diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Autowired.java b/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Autowired.java deleted file mode 100644 index aabf012082b1261f7120672b84491cd02f816569..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Autowired.java +++ /dev/null @@ -1,11 +0,0 @@ -package com.lagou.edu.annotation; - -import java.lang.annotation.ElementType; -import java.lang.annotation.Retention; -import java.lang.annotation.RetentionPolicy; -import java.lang.annotation.Target; - -@Target({ElementType.FIELD}) -@Retention(RetentionPolicy.RUNTIME) -public @interface Autowired { -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Service.java b/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Service.java deleted file mode 100644 index 02303b51665ca3e0d40ab854c8b354a1ba0e9d8a..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Service.java +++ /dev/null @@ -1,12 +0,0 @@ -package com.lagou.edu.annotation; - -import java.lang.annotation.ElementType; -import java.lang.annotation.Retention; -import java.lang.annotation.RetentionPolicy; -import java.lang.annotation.Target; - -@Target({ElementType.TYPE}) -@Retention(RetentionPolicy.RUNTIME) -public @interface Service { - String value() default ""; -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Transactional.java b/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Transactional.java deleted file mode 100644 index 5c529119ec5f8af06d90c74393cb5319e31c84d1..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Transactional.java +++ /dev/null @@ -1,11 +0,0 @@ -package com.lagou.edu.annotation; - -import java.lang.annotation.ElementType; -import java.lang.annotation.Retention; -import java.lang.annotation.RetentionPolicy; -import java.lang.annotation.Target; - -@Target({ElementType.TYPE}) -@Retention(RetentionPolicy.RUNTIME) -public @interface Transactional { -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/dao/AccountDao.java b/code/lagou-transfer/src/main/java/com/lagou/edu/dao/AccountDao.java deleted file mode 100755 index 462ad14477d321c9c0c6512d0dfcce25b7f8a9b4..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/dao/AccountDao.java +++ /dev/null @@ -1,13 +0,0 @@ -package com.lagou.edu.dao; - -import com.lagou.edu.pojo.Account; - -/** - * @author 应癫 - */ -public interface AccountDao { - - Account queryAccountByCardNo(String cardNo) throws Exception; - - int updateAccountByCardNo(Account account) throws Exception; -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/dao/impl/JdbcAccountDaoImpl.java b/code/lagou-transfer/src/main/java/com/lagou/edu/dao/impl/JdbcAccountDaoImpl.java deleted file mode 100755 index 5cd5f91c1a76d38028ae0dceb5ae0b6af84291ca..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/dao/impl/JdbcAccountDaoImpl.java +++ /dev/null @@ -1,77 +0,0 @@ -package com.lagou.edu.dao.impl; - -import com.lagou.edu.annotation.Autowired; -import com.lagou.edu.annotation.Repository; -import com.lagou.edu.pojo.Account; -import com.lagou.edu.dao.AccountDao; -import com.lagou.edu.utils.ConnectionUtils; -import com.lagou.edu.utils.DruidUtils; - -import java.sql.Connection; -import java.sql.PreparedStatement; -import java.sql.ResultSet; - -/** - * @author 应癫 - */ -@Repository(value = "accountDao") -public class JdbcAccountDaoImpl implements AccountDao { - - @Autowired - private ConnectionUtils connectionUtils; - - public void setConnectionUtils(ConnectionUtils connectionUtils) { - this.connectionUtils = connectionUtils; - } - - - public void init() { - System.out.println("初始化方法....."); - } - - public void destory() { - System.out.println("销毁方法......"); - } - - @Override - public Account queryAccountByCardNo(String cardNo) throws Exception { - //从连接池获取连接 - // Connection con = DruidUtils.getInstance().getConnection(); - Connection con = connectionUtils.getCurrentThreadConn(); - String sql = "select * from account where cardNo=?"; - PreparedStatement preparedStatement = con.prepareStatement(sql); - preparedStatement.setString(1,cardNo); - ResultSet resultSet = preparedStatement.executeQuery(); - - Account account = new Account(); - while(resultSet.next()) { - account.setCardNo(resultSet.getString("cardNo")); - account.setName(resultSet.getString("name")); - account.setMoney(resultSet.getInt("money")); - } - - resultSet.close(); - preparedStatement.close(); - //con.close(); - - return account; - } - - @Override - public int updateAccountByCardNo(Account account) throws Exception { - - // 从连接池获取连接 - // 改造为：从当前线程当中获取绑定的connection连接 - //Connection con = DruidUtils.getInstance().getConnection(); - Connection con = connectionUtils.getCurrentThreadConn(); - String sql = "update account set money=? where cardNo=?"; - PreparedStatement preparedStatement = con.prepareStatement(sql); - preparedStatement.setInt(1,account.getMoney()); - preparedStatement.setString(2,account.getCardNo()); - int i = preparedStatement.executeUpdate(); - - preparedStatement.close(); - //con.close(); - return i; - } -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/factory/AnnotationBeanFactory.java b/code/lagou-transfer/src/main/java/com/lagou/edu/factory/AnnotationBeanFactory.java deleted file mode 100755 index d04d07c138bf4bb06d35bf00b06d9871034645bf..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/factory/AnnotationBeanFactory.java +++ /dev/null @@ -1,135 +0,0 @@ -package com.lagou.edu.factory; - -import com.alibaba.druid.util.StringUtils; -import com.lagou.edu.annotation.Autowired; -import com.lagou.edu.annotation.Repository; -import com.lagou.edu.annotation.Service; -import com.lagou.edu.annotation.Transactional; -import org.dom4j.Document; -import org.dom4j.DocumentException; -import org.dom4j.Element; -import org.dom4j.io.SAXReader; -import org.reflections.Reflections; - -import java.io.InputStream; -import java.lang.annotation.Annotation; -import java.lang.reflect.Field; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.util.*; - -/** - * - * 工厂类，生产对象（使用反射技术） 注解方式 - */ -public class AnnotationBeanFactory { - - // IOC容器 - private static Map map = new HashMap<>(); - - // 业务逻辑类 所在包 - private static final String reposityPackage = "com.lagou.edu"; - - /** - * 任务一： - * 扫描业务逻辑所在包的 @Repository 和 @Service注解标识的类，创建其实例 并 放入map集合； - * 扫描map集合中实例字段，有@Autowired修饰则进行依赖注入，若有@Transactional修饰则注入其代理类； - */ - static { - // 扫描业务包 reposityPackage 下所有@Repository 和 @Service注解标识的类 - Reflections reflections = new Reflections(reposityPackage); - Set> repositySet = new HashSet<>(); - repositySet.addAll( reflections.getTypesAnnotatedWith(Repository.class) ); - repositySet.addAll( reflections.getTypesAnnotatedWith(Service.class) ); - - // 创建单例对象放入容器(id为 注解的value 或者 类名小写首字母) - for (Class clazz : repositySet){ - try { - // 实例创建 - Object bean = clazz.newInstance(); - - // id确定 - Repository reposityAnnotation = (Repository) clazz.getAnnotation(Repository.class); - Service serviceAnnotation = (Service) clazz.getAnnotation(Service.class); - String clazzName = clazz.getName(); - String id = getBeanId(reposityAnnotation ,serviceAnnotation , clazzName); - - map.put(id , bean); - } catch (InstantiationException e) { - e.printStackTrace(); - } catch (IllegalAccessException e) { - e.printStackTrace(); - } - } - - // 依赖注入 - for (Map.Entry entry : map.entrySet()){ - String key = entry.getKey(); - Object value = entry.getValue(); - Class clazz = value.getClass(); - Field[] declaredFields = clazz.getDeclaredFields(); - for (Field f : declaredFields){ - if(f.isAnnotationPresent(Autowired.class)){ - // 获取容器中 字段名对应的对象 - String id = f.getName(); - Object o = map.get(id); - - f.setAccessible( true ); - try { - f.set(value , o); - } catch (IllegalAccessException e) { - e.printStackTrace(); - } - } - } - - // 代理对象替换 - if (clazz.isAnnotationPresent(Transactional.class)){ - ProxyFactory proxyFactory = (ProxyFactory)map.get("proxyFactory"); - Class[] interfaces = clazz.getInterfaces(); - if (interfaces != null && interfaces.length > 0){ - value = proxyFactory.getJdkProxy(value); - } else { - value = proxyFactory.getCglibProxy(value); - } - } - map.put(key , value); - } - } - - /** - * 优先取注解上的value值，若为空，则默认为 类名的首字母小写的字符串 - */ - private static String getBeanId(Repository reposityAnnotation, Service serviceAnnotation, String clazzName) { - if (reposityAnnotation != null && !StringUtils.isEmpty( reposityAnnotation.value() )){ - return reposityAnnotation.value(); - } - - if (serviceAnnotation != null && !StringUtils.isEmpty( serviceAnnotation.value() )){ - return serviceAnnotation.value(); - } - - int i = clazzName.lastIndexOf("."); - String value = clazzName.substring(i + 1, clazzName.length()); - value= toFirstOneLowerCase( value ); - return value; - } - - // 字符串首字母小写 - public static String toFirstOneLowerCase(String s){ - if(Character.isLowerCase( s.charAt( 0 ) )){ - return s; - } - - return new StringBuilder() - .append(Character.toLowerCase( s.charAt( 0 ) )) - .append(s.substring(1 , s.length())) - .toString(); - } - - // 任务二：对外提供获取实例对象的接口（根据id获取） - public static Object getBean(String id) { - return map.get(id); - } - -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/factory/BeanFactory.java b/code/lagou-transfer/src/main/java/com/lagou/edu/factory/BeanFactory.java deleted file mode 100755 index edb221cd48d4a4bccbfdd5c31d268b126a199354..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/factory/BeanFactory.java +++ /dev/null @@ -1,104 +0,0 @@ -package com.lagou.edu.factory; - -import org.dom4j.Document; -import org.dom4j.DocumentException; -import org.dom4j.Element; -import org.dom4j.io.SAXReader; - -import java.io.InputStream; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.util.HashMap; -import java.util.List; -import java.util.Map; - -/** - * @author 应癫 - * - * 工厂类，生产对象（使用反射技术） - */ -public class BeanFactory { - - /** - * 任务一：读取解析xml，通过反射技术实例化对象并且存储待用（map集合） - * 任务二：对外提供获取实例对象的接口（根据id获取） - */ - - private static Map map = new HashMap<>(); // 存储对象 - - - static { - // 任务一：读取解析xml，通过反射技术实例化对象并且存储待用（map集合） - // 加载xml - InputStream resourceAsStream = BeanFactory.class.getClassLoader().getResourceAsStream("beans.xml"); - // 解析xml - SAXReader saxReader = new SAXReader(); - try { - Document document = saxReader.read(resourceAsStream); - Element rootElement = document.getRootElement(); - List beanList = rootElement.selectNodes("//bean"); - for (int i = 0; i < beanList.size(); i++) { - Element element = beanList.get(i); - // 处理每个bean元素，获取到该元素的id 和 class 属性 - String id = element.attributeValue("id"); // accountDao - String clazz = element.attributeValue("class"); // com.lagou.edu.dao.impl.JdbcAccountDaoImpl - // 通过反射技术实例化对象 - Class aClass = Class.forName(clazz); - Object o = aClass.newInstance(); // 实例化之后的对象 - - // 存储到map中待用 - map.put(id,o); - - } - - // 实例化完成之后维护对象的依赖关系，检查哪些对象需要传值进入，根据它的配置，我们传入相应的值 - // 有property子元素的bean就有传值需求 - List propertyList = rootElement.selectNodes("//property"); - // 解析property，获取父元素 - for (int i = 0; i < propertyList.size(); i++) { - Element element = propertyList.get(i); // - String name = element.attributeValue("name"); - String ref = element.attributeValue("ref"); - - // 找到当前需要被处理依赖关系的bean - Element parent = element.getParent(); - - // 调用父元素对象的反射功能 - String parentId = parent.attributeValue("id"); - Object parentObject = map.get(parentId); - // 遍历父对象中的所有方法，找到"set" + name - Method[] methods = parentObject.getClass().getMethods(); - for (int j = 0; j < methods.length; j++) { - Method method = methods[j]; - if(method.getName().equalsIgnoreCase("set" + name)) { // 该方法就是 setAccountDao(AccountDao accountDao) - method.invoke(parentObject,map.get(ref)); - } - } - - // 把处理之后的parentObject重新放到map中 - map.put(parentId,parentObject); - - } - - - } catch (DocumentException e) { - e.printStackTrace(); - } catch (ClassNotFoundException e) { - e.printStackTrace(); - } catch (IllegalAccessException e) { - e.printStackTrace(); - } catch (InstantiationException e) { - e.printStackTrace(); - } catch (InvocationTargetException e) { - e.printStackTrace(); - } - - } - - - // 任务二：对外提供获取实例对象的接口（根据id获取） - public static Object getBean(String id) { - return map.get(id); - } - -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/factory/ProxyFactory.java b/code/lagou-transfer/src/main/java/com/lagou/edu/factory/ProxyFactory.java deleted file mode 100755 index b34e8282bacce459f5819b0ba16ed82f1dabd5a6..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/factory/ProxyFactory.java +++ /dev/null @@ -1,115 +0,0 @@ -package com.lagou.edu.factory; - -import com.lagou.edu.annotation.Autowired; -import com.lagou.edu.annotation.Repository; -import com.lagou.edu.pojo.Account; -import com.lagou.edu.utils.TransactionManager; -import net.sf.cglib.proxy.Enhancer; -import net.sf.cglib.proxy.MethodInterceptor; -import net.sf.cglib.proxy.MethodProxy; - -import java.lang.reflect.InvocationHandler; -import java.lang.reflect.Method; -import java.lang.reflect.Proxy; - -/** - * @author 应癫 - * - * - * 代理对象工厂：生成代理对象的 - */ -@Repository -public class ProxyFactory { - - @Autowired - private TransactionManager transactionManager; - - public void setTransactionManager(TransactionManager transactionManager) { - this.transactionManager = transactionManager; - } - - /*private ProxyFactory(){ - - } - - private static ProxyFactory proxyFactory = new ProxyFactory(); - - public static ProxyFactory getInstance() { - return proxyFactory; - }*/ - - - - /** - * Jdk动态代理 - * @param obj 委托对象 - * @return 代理对象 - */ - public Object getJdkProxy(Object obj) { - - // 获取代理对象 - return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces(), - new InvocationHandler() { - @Override - public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { - Object result = null; - - try{ - // 开启事务(关闭事务的自动提交) - transactionManager.beginTransaction(); - - result = method.invoke(obj,args); - - // 提交事务 - - transactionManager.commit(); - }catch (Exception e) { - e.printStackTrace(); - // 回滚事务 - transactionManager.rollback(); - - // 抛出异常便于上层servlet捕获 - throw e; - - } - - return result; - } - }); - - } - - - /** - * 使用cglib动态代理生成代理对象 - * @param obj 委托对象 - * @return - */ - public Object getCglibProxy(Object obj) { - return Enhancer.create(obj.getClass(), new MethodInterceptor() { - @Override - public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable { - Object result = null; - try{ - // 开启事务(关闭事务的自动提交) - transactionManager.beginTransaction(); - - result = method.invoke(obj,objects); - - // 提交事务 - - transactionManager.commit(); - }catch (Exception e) { - e.printStackTrace(); - // 回滚事务 - transactionManager.rollback(); - - // 抛出异常便于上层servlet捕获 - throw e; - - } - return result; - } - }); - } -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/pojo/Account.java b/code/lagou-transfer/src/main/java/com/lagou/edu/pojo/Account.java deleted file mode 100755 index 50125a01bc08bef869a4cc5e251958137e70a080..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/pojo/Account.java +++ /dev/null @@ -1,40 +0,0 @@ -package com.lagou.edu.pojo; - -/** - * @author 应癫 - */ -public class Account { - - private String cardNo; - private String name; - private int money; - - public String getName() { - return name; - } - - public void setName(String name) { - this.name = name; - } - - public int getMoney() { - return money; - } - - public void setMoney(int money) { - this.money = money; - } - - public String getCardNo() { return cardNo; } - - public void setCardNo(String cardNo) { this.cardNo = cardNo;} - - @Override - public String toString() { - return "Account{" + - "cardNo='" + cardNo + '\'' + - ", name='" + name + '\'' + - ", money=" + money + - '}'; - } -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/pojo/Result.java b/code/lagou-transfer/src/main/java/com/lagou/edu/pojo/Result.java deleted file mode 100755 index 3e3961da2c623b4c8d29cfd5698e23f097c7ea8a..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/pojo/Result.java +++ /dev/null @@ -1,34 +0,0 @@ -package com.lagou.edu.pojo; - -/** - * @author 应癫 - */ -public class Result { - - private String status; - private String message; - - public String getStatus() { - return status; - } - - public void setStatus(String status) { - this.status = status; - } - - public String getMessage() { - return message; - } - - public void setMessage(String message) { - this.message = message; - } - - @Override - public String toString() { - return "Result{" + - "status='" + status + '\'' + - ", message='" + message + '\'' + - '}'; - } -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/service/TransferService.java b/code/lagou-transfer/src/main/java/com/lagou/edu/service/TransferService.java deleted file mode 100755 index fc75bbf8621ad3997e2c0010546688974603837e..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/service/TransferService.java +++ /dev/null @@ -1,9 +0,0 @@ -package com.lagou.edu.service; - -/** - * @author 应癫 - */ -public interface TransferService { - - void transfer(String fromCardNo,String toCardNo,int money) throws Exception; -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/service/impl/TransferServiceImpl.java b/code/lagou-transfer/src/main/java/com/lagou/edu/service/impl/TransferServiceImpl.java deleted file mode 100755 index e670a3ced6161868e64479c06b9b9666395fefa9..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/service/impl/TransferServiceImpl.java +++ /dev/null @@ -1,67 +0,0 @@ -package com.lagou.edu.service.impl; - -import com.lagou.edu.annotation.Autowired; -import com.lagou.edu.annotation.Service; -import com.lagou.edu.dao.AccountDao; -import com.lagou.edu.pojo.Account; -import com.lagou.edu.service.TransferService; -import com.lagou.edu.utils.ConnectionUtils; -import com.lagou.edu.utils.TransactionManager; - -/** - * @author 应癫 - */ -@Service(value = "transferService") -public class TransferServiceImpl implements TransferService { - - //private AccountDao accountDao = new JdbcAccountDaoImpl(); - - // private AccountDao accountDao = (AccountDao) BeanFactory.getBean("accountDao"); - - // 最佳状态 - @Autowired - private AccountDao accountDao; - - // 构造函数传值/set方法传值 - - public void setAccountDao(AccountDao accountDao) { - this.accountDao = accountDao; - } - - - - @Override - public void transfer(String fromCardNo, String toCardNo, int money) throws Exception { - - /*try{ - // 开启事务(关闭事务的自动提交) - TransactionManager.getInstance().beginTransaction();*/ - - Account from = accountDao.queryAccountByCardNo(fromCardNo); - Account to = accountDao.queryAccountByCardNo(toCardNo); - - from.setMoney(from.getMoney()-money); - to.setMoney(to.getMoney()+money); - - accountDao.updateAccountByCardNo(to); - int c = 1/0; - accountDao.updateAccountByCardNo(from); - - /* // 提交事务 - - TransactionManager.getInstance().commit(); - }catch (Exception e) { - e.printStackTrace(); - // 回滚事务 - TransactionManager.getInstance().rollback(); - - // 抛出异常便于上层servlet捕获 - throw e; - - }*/ - - - - - } -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/servlet/TransferServlet.java b/code/lagou-transfer/src/main/java/com/lagou/edu/servlet/TransferServlet.java deleted file mode 100755 index d8d45d6a96b2265933bb1f018f256dc268c50953..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/servlet/TransferServlet.java +++ /dev/null @@ -1,65 +0,0 @@ -package com.lagou.edu.servlet; - -import com.lagou.edu.factory.AnnotationBeanFactory; -import com.lagou.edu.factory.ProxyFactory; -import com.lagou.edu.utils.JsonUtils; -import com.lagou.edu.pojo.Result; -import com.lagou.edu.service.TransferService; - -import javax.servlet.ServletException; -import javax.servlet.annotation.WebServlet; -import javax.servlet.http.HttpServlet; -import javax.servlet.http.HttpServletRequest; -import javax.servlet.http.HttpServletResponse; -import java.io.IOException; - -/** - * @author 应癫 - */ -@WebServlet(name="transferServlet",urlPatterns = "/transferServlet") -public class TransferServlet extends HttpServlet { - - // 1. 实例化service层对象 - //private TransferService transferService = new TransferServiceImpl(); - //private TransferService transferService = (TransferService) BeanFactory.getBean("transferService"); - - // 从工厂获取委托对象（委托对象是增强了事务控制的功能） - - // 首先从BeanFactory获取到proxyFactory代理工厂的实例化对象 - private ProxyFactory proxyFactory = (ProxyFactory) AnnotationBeanFactory.getBean("proxyFactory"); - private TransferService transferService = (TransferService) proxyFactory.getJdkProxy(AnnotationBeanFactory.getBean("transferService")) ; - - @Override - protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { - doPost(req,resp); - } - - @Override - protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { - - // 设置请求体的字符编码 - req.setCharacterEncoding("UTF-8"); - - String fromCardNo = req.getParameter("fromCardNo"); - String toCardNo = req.getParameter("toCardNo"); - String moneyStr = req.getParameter("money"); - int money = Integer.parseInt(moneyStr); - - Result result = new Result(); - - try { - - // 2. 调用service层方法 - transferService.transfer(fromCardNo,toCardNo,money); - result.setStatus("200"); - } catch (Exception e) { - e.printStackTrace(); - result.setStatus("201"); - result.setMessage(e.toString()); - } - - // 响应 - resp.setContentType("application/json;charset=utf-8"); - resp.getWriter().print(JsonUtils.object2Json(result)); - } -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/ConnectionUtils.java b/code/lagou-transfer/src/main/java/com/lagou/edu/utils/ConnectionUtils.java deleted file mode 100755 index 1f3a762f821aa9e39d378e3c5030da6d1938e0fc..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/ConnectionUtils.java +++ /dev/null @@ -1,44 +0,0 @@ -package com.lagou.edu.utils; - -import com.lagou.edu.annotation.Repository; - -import java.sql.Connection; -import java.sql.SQLException; - -/** - * @author 应癫 - */ -@Repository -public class ConnectionUtils { - - /*private ConnectionUtils() { - - } - - private static ConnectionUtils connectionUtils = new ConnectionUtils(); - - public static ConnectionUtils getInstance() { - return connectionUtils; - }*/ - - - private ThreadLocal threadLocal = new ThreadLocal<>(); // 存储当前线程的连接 - - /** - * 从当前线程获取连接 - */ - public Connection getCurrentThreadConn() throws SQLException { - /** - * 判断当前线程中是否已经绑定连接，如果没有绑定，需要从连接池获取一个连接绑定到当前线程 - */ - Connection connection = threadLocal.get(); - if(connection == null) { - // 从连接池拿连接并绑定到线程 - connection = DruidUtils.getInstance().getConnection(); - // 绑定到当前线程 - threadLocal.set(connection); - } - return connection; - - } -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/DruidUtils.java b/code/lagou-transfer/src/main/java/com/lagou/edu/utils/DruidUtils.java deleted file mode 100755 index f1657d93b0ca337da3925e554d29fcecb80d79b5..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/DruidUtils.java +++ /dev/null @@ -1,28 +0,0 @@ -package com.lagou.edu.utils; - -import com.alibaba.druid.pool.DruidDataSource; - -/** - * @author 应癫 - */ -public class DruidUtils { - - private DruidUtils(){ - } - - private static DruidDataSource druidDataSource = new DruidDataSource(); - - - static { - druidDataSource.setDriverClassName("com.mysql.jdbc.Driver"); - druidDataSource.setUrl("jdbc:mysql://localhost:3306/bank"); - druidDataSource.setUsername("root"); - druidDataSource.setPassword("7"); - - } - - public static DruidDataSource getInstance() { - return druidDataSource; - } - -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/JsonUtils.java b/code/lagou-transfer/src/main/java/com/lagou/edu/utils/JsonUtils.java deleted file mode 100755 index dd20b02247328dcbb2f9b81692690c3ecedb5a92..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/JsonUtils.java +++ /dev/null @@ -1,67 +0,0 @@ -package com.lagou.edu.utils; - -import java.util.List; - -import com.fasterxml.jackson.core.JsonProcessingException; -import com.fasterxml.jackson.databind.JavaType; -import com.fasterxml.jackson.databind.ObjectMapper; - -/** - * JSON工具类（使用的是jackson实现的） - * @author 应癫 - */ -public class JsonUtils { - - private static final ObjectMapper MAPPER = new ObjectMapper(); - - /** - * 将对象转换成json字符串。 - * @param data - * @return - */ - public static String object2Json(Object data) { - try { - String string = MAPPER.writeValueAsString(data); - return string; - } catch (JsonProcessingException e) { - e.printStackTrace(); - } - return null; - } - - /** - * 将json结果集转化为对象 - * - * @param jsonData json数据 - * @param beanType 对象中的object类型 - * @return - */ - public static T json2Pojo(String jsonData, Class beanType) { - try { - T t = MAPPER.readValue(jsonData, beanType); - return t; - } catch (Exception e) { - e.printStackTrace(); - } - return null; - } - - /** - * 将json数据转换成pojo对象list - * @param jsonData - * @param beanType - * @return - */ - public static List json2List(String jsonData, Class beanType) { - JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType); - try { - List list = MAPPER.readValue(jsonData, javaType); - return list; - } catch (Exception e) { - e.printStackTrace(); - } - - return null; - } - -} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/TransactionManager.java b/code/lagou-transfer/src/main/java/com/lagou/edu/utils/TransactionManager.java deleted file mode 100755 index 2508036facde42a15a30285d1ec35c99542f7326..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/utils/TransactionManager.java +++ /dev/null @@ -1,51 +0,0 @@ -package com.lagou.edu.utils; - -import com.lagou.edu.annotation.Autowired; -import com.lagou.edu.annotation.Repository; - -import java.sql.SQLException; - -/** - * @author 应癫 - * - * 事务管理器类：负责手动事务的开启、提交、回滚 - */ -@Repository -public class TransactionManager { - - @Autowired - private ConnectionUtils connectionUtils; - - public void setConnectionUtils(ConnectionUtils connectionUtils) { - this.connectionUtils = connectionUtils; - } - - /*private TransactionManager(){ - - } - - private static TransactionManager transactionManager = new TransactionManager(); - - public static TransactionManager getInstance() { - return transactionManager; - }*/ - - - - // 开启手动事务控制 - public void beginTransaction() throws SQLException { - connectionUtils.getCurrentThreadConn().setAutoCommit(false); - } - - - // 提交事务 - public void commit() throws SQLException { - connectionUtils.getCurrentThreadConn().commit(); - } - - - // 回滚事务 - public void rollback() throws SQLException { - connectionUtils.getCurrentThreadConn().rollback(); - } -} diff --git a/code/lagou-transfer/src/main/resources/beans.xml b/code/lagou-transfer/src/main/resources/beans.xml deleted file mode 100755 index 6ec0912e1bcc2f071cc6d45bee1081712b8df8fe..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/resources/beans.xml +++ /dev/null @@ -1,26 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - \ No newline at end of file diff --git a/code/lagou-transfer/src/main/webapp/index.html b/code/lagou-transfer/src/main/webapp/index.html deleted file mode 100755 index cfd63b0d5d1cf43e804f70d7a187fc43c1d171a8..0000000000000000000000000000000000000000 --- a/code/lagou-transfer/src/main/webapp/index.html +++ /dev/null @@ -1,146 +0,0 @@ - - - - - 转账汇款 - - - - - - - - - - -
- - - - - - - - - - - - - - - - - -
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+ +import com.lagou.demo.service.IDemoService; +import com.lagou.edu.mvcframework.annotations.LagouAutowired; +import com.lagou.edu.mvcframework.annotations.LagouController; +import com.lagou.edu.mvcframework.annotations.LagouRequestMapping; +import com.lagou.edu.mvcframework.annotations.Security; + +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +@LagouController +@LagouRequestMapping("/demo") +@Security(value = "admin") +public class DemoController { + + + @LagouAutowired + private IDemoService demoService; + + + /** + * URL: /demo/query?name=lisi + * @param request + * @param response + * @param name + * @return + */ + @LagouRequestMapping("/query") + public String query(HttpServletRequest request, HttpServletResponse response,String name) { + return demoService.get(name); + } + + @LagouRequestMapping("/getOnlyByUser1") + @Security(value = "user1") + public String getOnlyByUser1(HttpServletRequest request, HttpServletResponse response,String name) { + return demoService.getOnlyByUser1(name); + } + + @LagouRequestMapping("/getOnlyByUser2") + @Security(value = "user2") + public String getOnlyByUser2(HttpServletRequest request, HttpServletResponse response,String name) { + return demoService.getOnlyByUser2(name); + } +} diff --git a/code/mvc/src/main/java/com/lagou/demo/service/IDemoService.java b/code/mvc/src/main/java/com/lagou/demo/service/IDemoService.java new file mode 100644 index 0000000000000000000000000000000000000000..cdaa480f518121e9abd303ad9640ef85dce969c9 --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/demo/service/IDemoService.java @@ -0,0 +1,10 @@ +package com.lagou.demo.service; + +public interface IDemoService { + + String get(String name); + + String getOnlyByUser1(String name); + + String getOnlyByUser2(String name); +} diff --git a/code/mvc/src/main/java/com/lagou/demo/service/impl/DemoServiceImpl.java b/code/mvc/src/main/java/com/lagou/demo/service/impl/DemoServiceImpl.java new file mode 100644 index 0000000000000000000000000000000000000000..45aafddb171355f87930963b5e3402113a455194 --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/demo/service/impl/DemoServiceImpl.java @@ -0,0 +1,23 @@ +package com.lagou.demo.service.impl; + +import com.lagou.demo.service.IDemoService; +import com.lagou.edu.mvcframework.annotations.LagouService; + +@LagouService("demoService") +public class DemoServiceImpl implements IDemoService { + @Override + public String get(String name) { + System.out.println("service 实现类中的name参数：" + name) ; + return name; + } + + @Override + public String getOnlyByUser1(String name) { + return get(name); + } + + @Override + public String getOnlyByUser2(String name) { + return get(name); + } +} diff --git a/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouAutowired.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouAutowired.java new file mode 100644 index 0000000000000000000000000000000000000000..8e10a01777a18a48ff0902890b884f9b07db170d --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouAutowired.java @@ -0,0 +1,10 @@ +package com.lagou.edu.mvcframework.annotations; + +import java.lang.annotation.*; + +@Documented +@Target(ElementType.FIELD) +@Retention(RetentionPolicy.RUNTIME) +public @interface LagouAutowired { + String value() default ""; +} diff --git a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Repository.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouController.java similarity index 30% rename from code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Repository.java rename to code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouController.java index 01445a4fe3849055567904ad7eebf57510499ab2..5022b35e1e81fb3ad3a5d0e395f81c40eae6cf45 100644 --- a/code/lagou-transfer/src/main/java/com/lagou/edu/annotation/Repository.java +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouController.java @@ -1,12 +1,10 @@ -package com.lagou.edu.annotation; +package com.lagou.edu.mvcframework.annotations; -import java.lang.annotation.ElementType; -import java.lang.annotation.Retention; -import java.lang.annotation.RetentionPolicy; -import java.lang.annotation.Target; +import java.lang.annotation.*; +@Documented @Target(ElementType.TYPE) @Retention(RetentionPolicy.RUNTIME) -public @interface Repository { +public @interface LagouController { String value() default ""; } diff --git a/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouRequestMapping.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouRequestMapping.java new file mode 100644 index 0000000000000000000000000000000000000000..f075c513973f5f06b17e71b971173595e2e96eaf --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouRequestMapping.java @@ -0,0 +1,10 @@ +package com.lagou.edu.mvcframework.annotations; + +import java.lang.annotation.*; + +@Documented +@Target({ElementType.TYPE,ElementType.METHOD}) +@Retention(RetentionPolicy.RUNTIME) +public @interface LagouRequestMapping { + String value() default ""; +} diff --git a/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouService.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouService.java new file mode 100644 index 0000000000000000000000000000000000000000..c7214fc64214bfb4043d324f89c55faa1aa6f7c1 --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/LagouService.java @@ -0,0 +1,10 @@ +package com.lagou.edu.mvcframework.annotations; + +import java.lang.annotation.*; + +@Documented +@Target(ElementType.TYPE) +@Retention(RetentionPolicy.RUNTIME) +public @interface LagouService { + String value() default ""; +} diff --git a/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/Security.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/Security.java new file mode 100644 index 0000000000000000000000000000000000000000..32d2d7d65cacdfad90d23592ef0bf28208e4b59e --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/annotations/Security.java @@ -0,0 +1,10 @@ +package com.lagou.edu.mvcframework.annotations; + +import java.lang.annotation.*; + +@Documented +@Target(value = {ElementType.TYPE , ElementType.METHOD}) +@Retention(RetentionPolicy.RUNTIME) +public @interface Security { + String[] value(); +} diff --git a/code/mvc/src/main/java/com/lagou/edu/mvcframework/exception/SecurityException.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/exception/SecurityException.java new file mode 100644 index 0000000000000000000000000000000000000000..df0e6dc7b78dbf7a3277e0ac4cc74fc64874b9c9 --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/exception/SecurityException.java @@ -0,0 +1,31 @@ +package com.lagou.edu.mvcframework.exception; + +public class SecurityException extends Throwable { + private Integer code; + + private String msg; + + public SecurityException() { + } + + public SecurityException(Integer code, String msg) { + this.code = code; + this.msg = msg; + } + + public Integer getCode() { + return code; + } + + public void setCode(Integer code) { + this.code = code; + } + + public String getMsg() { + return msg; + } + + public void setMsg(String msg) { + this.msg = msg; + } +} diff --git a/code/mvc/src/main/java/com/lagou/edu/mvcframework/pojo/Handler.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/pojo/Handler.java new file mode 100644 index 0000000000000000000000000000000000000000..0b6d074d066c2543efe3b182ec230f400eb65583 --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/pojo/Handler.java @@ -0,0 +1,69 @@ +package com.lagou.edu.mvcframework.pojo; + +import javax.sound.midi.MetaEventListener; +import java.lang.reflect.Method; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; +import java.util.regex.Pattern; + + +/** + * 封装handler方法相关的信息 + */ +public class Handler { + + private Object controller; // method.invoke(obj,) + + private Method method; + + private Pattern pattern; // spring中url是支持正则的 + + private Map paramIndexMapping; // 参数顺序,是为了进行参数绑定，key是参数名，value代表是第几个参数 + + private Set allowedUserSet = new HashSet<>(); + + public Set getAllowedUserSet() { + return allowedUserSet; + } + + public Handler(Object controller, Method method, Pattern pattern) { + this.controller = controller; + this.method = method; + this.pattern = pattern; + this.paramIndexMapping = new HashMap<>(); + } + + public Object getController() { + return controller; + } + + public void setController(Object controller) { + this.controller = controller; + } + + public Method getMethod() { + return method; + } + + public void setMethod(Method method) { + this.method = method; + } + + public Pattern getPattern() { + return pattern; + } + + public void setPattern(Pattern pattern) { + this.pattern = pattern; + } + + public Map getParamIndexMapping() { + return paramIndexMapping; + } + + public void setParamIndexMapping(Map paramIndexMapping) { + this.paramIndexMapping = paramIndexMapping; + } +} diff --git a/code/mvc/src/main/java/com/lagou/edu/mvcframework/servlet/LgDispatcherServlet.java b/code/mvc/src/main/java/com/lagou/edu/mvcframework/servlet/LgDispatcherServlet.java new file mode 100644 index 0000000000000000000000000000000000000000..06cf76d4c32cc4d0647ed733258b84479a571df9 --- /dev/null +++ b/code/mvc/src/main/java/com/lagou/edu/mvcframework/servlet/LgDispatcherServlet.java @@ -0,0 +1,418 @@ +package com.lagou.edu.mvcframework.servlet; + +import com.lagou.edu.mvcframework.exception.SecurityException; +import com.lagou.edu.mvcframework.annotations.*; +import com.lagou.edu.mvcframework.pojo.Handler; +import org.apache.commons.lang3.StringUtils; + +import javax.servlet.ServletConfig; +import javax.servlet.ServletException; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import java.io.File; +import java.io.IOException; +import java.io.InputStream; +import java.lang.reflect.Field; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.lang.reflect.Parameter; +import java.util.*; +import java.util.regex.Matcher; +import java.util.regex.Pattern; + +public class LgDispatcherServlet extends HttpServlet { + + + private Properties properties = new Properties(); + + private List classNames = new ArrayList<>(); // 缓存扫描到的类的全限定类名 + + // ioc容器 + private Map ioc = new HashMap(); + + + // handlerMapping + //private Map handlerMapping = now HashMap<>(); // 存储url和Method之间的映射关系 + private List handlerMapping = new ArrayList<>(); + + @Override + public void init(ServletConfig config) throws ServletException { + // 1 加载配置文件 springmvc.properties + String contextConfigLocation = config.getInitParameter("contextConfigLocation"); + doLoadConfig(contextConfigLocation); + + // 2 扫描相关的类，扫描注解 + doScan(properties.getProperty("scanPackage")); + + + // 3 初始化bean对象（实现ioc容器，基于注解） + doInstance(); + + // 4 实现依赖注入 + doAutoWired(); + + // 5 构造一个HandlerMapping处理器映射器，将配置好的url和Method建立映射关系 + initHandlerMapping(); + + System.out.println("lagou mvc 初始化完成...."); + + // 等待请求进入，处理请求 + } + + /* + 构造一个HandlerMapping处理器映射器 + 最关键的环节 + 目的：将url和method建立关联 + */ + private void initHandlerMapping() { + if(ioc.isEmpty()) {return;} + + for(Map.Entry entry: ioc.entrySet()) { + // 获取ioc中当前遍历的对象的class类型 + Class aClass = entry.getValue().getClass(); + + + if(!aClass.isAnnotationPresent(LagouController.class)) {continue;} + + + String baseUrl = ""; + if(aClass.isAnnotationPresent(LagouRequestMapping.class)) { + LagouRequestMapping annotation = aClass.getAnnotation(LagouRequestMapping.class); + baseUrl = annotation.value(); // 等同于/demo + } + + String[] controllerAllowedUsers = new String[]{}; + if(aClass.isAnnotationPresent(Security.class)) { + Security annotation = aClass.getAnnotation(Security.class); + controllerAllowedUsers = annotation.value(); + } + + // 获取方法 + Method[] methods = aClass.getMethods(); + for (int i = 0; i < methods.length; i++) { + Method method = methods[i]; + + // 方法没有标识LagouRequestMapping，就不处理 + if(!method.isAnnotationPresent(LagouRequestMapping.class)) {continue;} + + // 如果标识，就处理 + LagouRequestMapping annotation = method.getAnnotation(LagouRequestMapping.class); + String methodUrl = annotation.value(); // /query + String url = baseUrl + methodUrl; // 计算出来的url /demo/query + + // 把method所有信息及url封装为一个Handler + Handler handler = new Handler(entry.getValue(),method, Pattern.compile(url)); + + + // 计算方法的参数位置信息 // query(HttpServletRequest request, HttpServletResponse response,String name) + Parameter[] parameters = method.getParameters(); + for (int j = 0; j < parameters.length; j++) { + Parameter parameter = parameters[j]; + + if(parameter.getType() == HttpServletRequest.class || parameter.getType() == HttpServletResponse.class) { + // 如果是request和response对象，那么参数名称写HttpServletRequest和HttpServletResponse + handler.getParamIndexMapping().put(parameter.getType().getSimpleName(),j); + }else{ + handler.getParamIndexMapping().put(parameter.getName(),j); // + } + + } + + addUser(handler.getAllowedUserSet() , controllerAllowedUsers); + if(method.isAnnotationPresent(Security.class)) { + Security annotationSecurity = method.getAnnotation(Security.class); + addUser(handler.getAllowedUserSet() , annotationSecurity.value()); + } + + // 建立url和method之间的映射关系（map缓存起来） + handlerMapping.add(handler); + + } + + + } + + } + + private void addSecurityUser(Set allowedUserSet, String[] controllerAllowedUsers, String[] value) { + if (controllerAllowedUsers.length > 0){ + addUser(allowedUserSet , controllerAllowedUsers); + } + + if (value.length > 0){ + addUser(allowedUserSet , value); + } + } + + private void addUser(Set allowedUserSet, String[] controllerAllowedUsers) { + if (controllerAllowedUsers == null || controllerAllowedUsers.length <1){ + return; + } + for (String user : controllerAllowedUsers){ + allowedUserSet.add( user ); + } + } + + // 实现依赖注入 + private void doAutoWired() { + if(ioc.isEmpty()) {return;} + + // 有对象，再进行依赖注入处理 + + // 遍历ioc中所有对象，查看对象中的字段，是否有@LagouAutowired注解，如果有需要维护依赖注入关系 + for(Map.Entry entry: ioc.entrySet()) { + // 获取bean对象中的字段信息 + Field[] declaredFields = entry.getValue().getClass().getDeclaredFields(); + // 遍历判断处理 + for (int i = 0; i < declaredFields.length; i++) { + Field declaredField = declaredFields[i]; // @LagouAutowired private IDemoService demoService; + if(!declaredField.isAnnotationPresent(LagouAutowired.class)) { + continue; + } + + + // 有该注解 + LagouAutowired annotation = declaredField.getAnnotation(LagouAutowired.class); + String beanName = annotation.value(); // 需要注入的bean的id + if("".equals(beanName.trim())) { + // 没有配置具体的bean id，那就需要根据当前字段类型注入（接口注入） IDemoService + beanName = declaredField.getType().getName(); + } + + // 开启赋值 + declaredField.setAccessible(true); + + try { + declaredField.set(entry.getValue(),ioc.get(beanName)); + } catch (IllegalAccessException e) { + e.printStackTrace(); + } + + } + + + } + + + + + } + + + // ioc容器 + // 基于classNames缓存的类的全限定类名，以及反射技术，完成对象创建和管理 + private void doInstance() { + + if(classNames.size() == 0) return; + + try{ + + for (int i = 0; i < classNames.size(); i++) { + String className = classNames.get(i); // com.lagou.demo.controller.DemoController + + // 反射 + Class aClass = Class.forName(className); + // 区分controller，区分service' + if(aClass.isAnnotationPresent(LagouController.class)) { + // controller的id此处不做过多处理，不取value了，就拿类的首字母小写作为id，保存到ioc中 + String simpleName = aClass.getSimpleName();// DemoController + String lowerFirstSimpleName = lowerFirst(simpleName); // demoController + Object o = aClass.newInstance(); + ioc.put(lowerFirstSimpleName,o); + }else if(aClass.isAnnotationPresent(LagouService.class)) { + LagouService annotation = aClass.getAnnotation(LagouService.class); + //获取注解value值 + String beanName = annotation.value(); + + // 如果指定了id，就以指定的为准 + if(!"".equals(beanName.trim())) { + ioc.put(beanName,aClass.newInstance()); + }else{ + // 如果没有指定，就以类名首字母小写 + beanName = lowerFirst(aClass.getSimpleName()); + ioc.put(beanName,aClass.newInstance()); + } + + + // service层往往是有接口的，面向接口开发，此时再以接口名为id，放入一份对象到ioc中，便于后期根据接口类型注入 + Class[] interfaces = aClass.getInterfaces(); + for (int j = 0; j < interfaces.length; j++) { + Class anInterface = interfaces[j]; + // 以接口的全限定类名作为id放入 + ioc.put(anInterface.getName(),aClass.newInstance()); + } + }else{ + continue; + } + + } + }catch (Exception e) { + e.printStackTrace(); + } + + + + + + + } + + + // 首字母小写方法 + public String lowerFirst(String str) { + char[] chars = str.toCharArray(); + if('A' <= chars[0] && chars[0] <= 'Z') { + chars[0] += 32; + } + return String.valueOf(chars); + } + + + + + // 扫描类 + // scanPackage: com.lagou.demo package----> 磁盘上的文件夹（File） com/lagou/demo + private void doScan(String scanPackage) { + String scanPackagePath = Thread.currentThread().getContextClassLoader().getResource("").getPath() + scanPackage.replaceAll("\\.", "/"); + File pack = new File(scanPackagePath); + + File[] files = pack.listFiles(); + + for(File file: files) { + if(file.isDirectory()) { // 子package + // 递归 + doScan(scanPackage + "." + file.getName()); // com.lagou.demo.controller + }else if(file.getName().endsWith(".class")) { + String className = scanPackage + "." + file.getName().replaceAll(".class", ""); + classNames.add(className); + } + + } + + + } + + // 加载配置文件 + private void doLoadConfig(String contextConfigLocation) { + + InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream(contextConfigLocation); + + try { + properties.load(resourceAsStream); + } catch (IOException e) { + e.printStackTrace(); + } + + } + + + @Override + protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { + doPost(req,resp); + } + + + @Override + protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { + // 处理请求：根据url，找到对应的Method方法，进行调用 + // 获取uri +// String requestURI = req.getRequestURI(); +// Method method = handlerMapping.get(requestURI);// 获取到一个反射的方法 + // 反射调用，需要传入对象，需要传入参数，此处无法完成调用，没有把对象缓存起来，也没有参数！！！！改造initHandlerMapping(); +// method.invoke() // + + + // 根据uri获取到能够处理当前请求的hanlder（从handlermapping中（list）） + Handler handler = getHandler(req); + + try { + ensureSecurity(handler , req); + } catch (SecurityException e) { + resp.getWriter().write(e.getMsg()); + return; + } + + if(handler == null) { + resp.getWriter().write("404 not found"); + return; + } + + // 参数绑定 + // 获取所有参数类型数组，这个数组的长度就是我们最后要传入的args数组的长度 + Class[] parameterTypes = handler.getMethod().getParameterTypes(); + + + // 根据上述数组长度创建一个新的数组（参数数组，是要传入反射调用的） + Object[] paraValues = new Object[parameterTypes.length]; + + // 以下就是为了向参数数组中塞值，而且还得保证参数的顺序和方法中形参顺序一致 + + Map parameterMap = req.getParameterMap(); + + // 遍历request中所有参数 （填充除了request，response之外的参数） + for(Map.Entry param: parameterMap.entrySet()) { + // name=1&name=2 name [1,2] + String value = StringUtils.join(param.getValue(), ","); // 如同 1,2 + + // 如果参数和方法中的参数匹配上了，填充数据 + if(!handler.getParamIndexMapping().containsKey(param.getKey())) {continue;} + + // 方法形参确实有该参数，找到它的索引位置，对应的把参数值放入paraValues + Integer index = handler.getParamIndexMapping().get(param.getKey());//name在第 2 个位置 + + paraValues[index] = value; // 把前台传递过来的参数值填充到对应的位置去 + + } + + + int requestIndex = handler.getParamIndexMapping().get(HttpServletRequest.class.getSimpleName()); // 0 + paraValues[requestIndex] = req; + + + int responseIndex = handler.getParamIndexMapping().get(HttpServletResponse.class.getSimpleName()); // 1 + paraValues[responseIndex] = resp; + + + + + // 最终调用handler的method属性 + try { + Object res = handler.getMethod().invoke(handler.getController(), paraValues); + resp.getWriter().write(res.toString()); + + } catch (IllegalAccessException e) { + e.printStackTrace(); + } catch (InvocationTargetException e) { + e.printStackTrace(); + } + + } + + private boolean ensureSecurity(Handler handler, HttpServletRequest req) throws SecurityException{ + String[] usernames = req.getParameterValues("username"); + if (usernames!=null && usernames.length > 0 && handler.getAllowedUserSet().contains( usernames[0] )){ + return true; + }else{ + throw new SecurityException(999 , "no ahth!"); + } + + } + + private Handler getHandler(HttpServletRequest req) { + if(handlerMapping.isEmpty()){return null;} + + String url = req.getRequestURI(); + + for(Handler handler: handlerMapping) { + Matcher matcher = handler.getPattern().matcher(url); + if(!matcher.matches()){continue;} + return handler; + } + + return null; + + } + + +} diff --git a/code/mvc/src/main/resources/springmvc.properties b/code/mvc/src/main/resources/springmvc.properties new file mode 100644 index 0000000000000000000000000000000000000000..28e2b4697da4d45c40b38bf90f9bfc6bbb05dfd9 --- /dev/null +++ b/code/mvc/src/main/resources/springmvc.properties @@ -0,0 +1 @@ +scanPackage=com.lagou.demo \ No newline at end of file diff --git a/code/lagou-transfer/src/main/webapp/WEB-INF/web.xml b/code/mvc/src/main/webapp/WEB-INF/web.xml old mode 100755 new mode 100644 similarity index 33% rename from code/lagou-transfer/src/main/webapp/WEB-INF/web.xml rename to code/mvc/src/main/webapp/WEB-INF/web.xml index 9f88c1f9632445500e3b3688fe477b860f77d8f2..b3de15423589bc64cd655b20ef49d2a5f038f774 --- a/code/lagou-transfer/src/main/webapp/WEB-INF/web.xml +++ b/code/mvc/src/main/webapp/WEB-INF/web.xml @@ -4,4 +4,19 @@ Archetype Created Web Application + + + + lgoumvc + com.lagou.edu.mvcframework.servlet.LgDispatcherServlet + + contextConfigLocation + springmvc.properties + + + + + lgoumvc + /* + diff --git a/code/mvc/src/main/webapp/index.jsp b/code/mvc/src/main/webapp/index.jsp new file mode 100644 index 0000000000000000000000000000000000000000..c38169bb958579c635a5c09ee2f379cc5956c0c2 --- /dev/null +++ b/code/mvc/src/main/webapp/index.jsp @@ -0,0 +1,5 @@ + + +

Hello World!

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