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eson15eson15
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springmvc中的拦截器
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9 files changed

+261
-2
lines changed

9 files changed

+261
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lines changed

‎WebRoot/WEB-INF/jsp/items/editItems.jsp

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@@ -10,7 +10,6 @@
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</head>
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<body>
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<form id="itemForm"
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action="${pageContext.request.contextPath }/editItemsSubmit.action"
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method="post" enctype="multipart/form-data">

‎WebRoot/WEB-INF/jsp/items/itemsList.jsp

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@@ -19,6 +19,9 @@ function deleteItems() {
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</script>
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</head>
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<body>
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<c:if test="${username != null }">
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${username } <a href="${pageContext.request.contextPath }/logout.action">退出</a>
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</c:if>
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<form name="itemsForm"
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action="${pageContext.request.contextPath }/editItemsAllSubmit.action"
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method="post">

‎WebRoot/WEB-INF/jsp/login.jsp

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<%@ page language="java" contentType="text/html; charset=UTF-8"
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pageEncoding="UTF-8"%>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>登陆页面</title>
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</head>
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<body>
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<form action="${pageContext.request.contextPath }/login.action" method="post">
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用户名：<input type="text" name="username" /><br>
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密码：<input type="password" name="password" /><br>
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<input type="submit" name="提交" />
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</form>
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</body>
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</html>

‎config/spring/springmvc.xml

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<!-- 静态资源解析，包括js,css,img... -->
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<mvc:resources location="/js/" mapping="/js/**"></mvc:resources>
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<mvc:resources location="/img/" mapping="/img/**"></mvc:resources>
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<!-- 配置拦截器 -->
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<mvc:interceptors>
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<!-- 多个拦截器，按顺序执行 -->
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<mvc:interceptor>
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<mvc:mapping path="/**"/> <!-- 拦截所有的url包括子url路径 -->
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<bean class="ssm.interceptor.LoginInterceptor"/>
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</mvc:interceptor>
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<mvc:interceptor>
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<mvc:mapping path="/**"/> <!-- 拦截所有的url包括子url路径 -->
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<bean class="ssm.interceptor.HandlerInterceptor1"/>
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</mvc:interceptor>
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<mvc:interceptor>
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<mvc:mapping path="/**"/>
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<bean class="ssm.interceptor.HandlerInterceptor2"/>
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</mvc:interceptor>
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<mvc:interceptor>
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<mvc:mapping path="/**"/>
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<bean class="ssm.interceptor.HandlerInterceptor3"/>
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</mvc:interceptor>
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</mvc:interceptors>
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</beans>

‎src/ssm/controller/ItemsController.java

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@@ -5,6 +5,7 @@
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import java.util.UUID;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpSession;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
@@ -205,5 +206,24 @@ public String editItemsQueryResult(ItemsQueryVo itemsQueryVo)
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return itemsCustom;
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}
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//登陆
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@RequestMapping("/login")
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public String login(HttpServletRequest request, String username, String password) throws Exception {
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//实际中要去和数据库匹配的
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//....
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HttpSession session = request.getSession();
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session.setAttribute("username", username);
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return "redirect:queryItems.action";
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}
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//退出
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@RequestMapping("/logout")
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public String logout(HttpServletRequest request) throws Exception {
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HttpSession session = request.getSession();
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session.invalidate();
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return "redirect:queryItems.action";
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}
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}

‎src/ssm/interceptor/HandlerInterceptor1.java

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package ssm.interceptor;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.springframework.web.servlet.HandlerInterceptor;
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import org.springframework.web.servlet.ModelAndView;
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//测试拦截器1
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public class HandlerInterceptor1 implements HandlerInterceptor{
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//进入Handler方法之前执行
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//可以用于身份认证、身份授权。如果认证没有通过表示用户没有登陆，需要此方法拦截不再往下执行，否则就放行
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@Override
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public boolean preHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler) throws Exception {
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System.out.println("HandlerInterceptor1....preHandle");
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//false表示拦截，不向下执行；true表示放行
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return true;
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}
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//进入Handler方法之后，返回ModelAndView之前执行
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//应用场景从modelAndView出发：将公用的模型数据（比如菜单导航之类的）在这里传到视图，也可以在这里同一指定视图
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@Override
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public void postHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler,
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ModelAndView modelAndView) throws Exception {
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System.out.println("HandlerInterceptor1....postHandle");
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}
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//执行Handler完成之后执行
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//应用场景：统一异常处理，统一日志处理
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@Override
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public void afterCompletion(HttpServletRequest request,
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HttpServletResponse response, Object handler, Exception ex)
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throws Exception {
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System.out.println("HandlerInterceptor1....afterCompletion");
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}
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}

‎src/ssm/interceptor/HandlerInterceptor2.java

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package ssm.interceptor;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.springframework.web.servlet.HandlerInterceptor;
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import org.springframework.web.servlet.ModelAndView;
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//测试拦截器1
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public class HandlerInterceptor2 implements HandlerInterceptor{
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//进入Handler方法之前执行
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//可以用于身份认证、身份授权。如果认证没有通过表示用户没有登陆，需要此方法拦截不再往下执行，否则就放行
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@Override
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public boolean preHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler) throws Exception {
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System.out.println("HandlerInterceptor2....preHandle");
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//false表示拦截，不向下执行；true表示放行
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return true;
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}
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//进入Handler方法之后，返回ModelAndView之前执行
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//应用场景从modelAndView出发：将公用的模型数据（比如菜单导航之类的）在这里传到视图，也可以在这里同一指定视图
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@Override
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public void postHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler,
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ModelAndView modelAndView) throws Exception {
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System.out.println("HandlerInterceptor2....postHandle");
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}
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//执行Handler完成之后执行
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//应用场景：统一异常处理，统一日志处理
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@Override
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public void afterCompletion(HttpServletRequest request,
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HttpServletResponse response, Object handler, Exception ex)
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throws Exception {
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System.out.println("HandlerInterceptor2....afterCompletion");
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}
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}

‎src/ssm/interceptor/HandlerInterceptor3.java

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package ssm.interceptor;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.springframework.web.servlet.HandlerInterceptor;
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import org.springframework.web.servlet.ModelAndView;
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//测试拦截器1
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public class HandlerInterceptor3 implements HandlerInterceptor{
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//进入Handler方法之前执行
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//可以用于身份认证、身份授权。如果认证没有通过表示用户没有登陆，需要此方法拦截不再往下执行，否则就放行
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@Override
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public boolean preHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler) throws Exception {
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System.out.println("HandlerInterceptor3....preHandle");
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//false表示拦截，不向下执行；true表示放行
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return true;
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}
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//进入Handler方法之后，返回ModelAndView之前执行
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//应用场景从modelAndView出发：将公用的模型数据（比如菜单导航之类的）在这里传到视图，也可以在这里同一指定视图
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@Override
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public void postHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler,
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ModelAndView modelAndView) throws Exception {
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System.out.println("HandlerInterceptor3....postHandle");
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}
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//执行Handler完成之后执行
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//应用场景：统一异常处理，统一日志处理
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@Override
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public void afterCompletion(HttpServletRequest request,
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HttpServletResponse response, Object handler, Exception ex)
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throws Exception {
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System.out.println("HandlerInterceptor3....afterCompletion");
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}
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}

‎src/ssm/interceptor/LoginInterceptor.java

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package ssm.interceptor;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import org.springframework.web.servlet.HandlerInterceptor;
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import org.springframework.web.servlet.ModelAndView;
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//测试拦截器1
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public class LoginInterceptor implements HandlerInterceptor{
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//进入Handler方法之前执行
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//可以用于身份认证、身份授权。如果认证没有通过表示用户没有登陆，需要此方法拦截不再往下执行，否则就放行
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@Override
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public boolean preHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler) throws Exception {
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//获取请求的url
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String url = request.getRequestURI();
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//判断url是否公开地址（实际使用时将公开地址配置到配置文件中）
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//这里公开地址是否登陆提交的地址
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if(url.indexOf("login.action") > 0) {
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//如果进行登陆提交，放行
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return true;
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}
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//判断session
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HttpSession session = request.getSession();
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//从session中取出用户身份信息
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String username = (String) session.getAttribute("username");
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if(username != null) {
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return true;
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}
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//执行到这里表示用户身份需要验证，跳转到登陆页面
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request.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(request, response);
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return false;
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}
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//进入Handler方法之后，返回ModelAndView之前执行
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//应用场景从modelAndView出发：将公用的模型数据（比如菜单导航之类的）在这里传到视图，也可以在这里同一指定视图
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@Override
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public void postHandle(HttpServletRequest request,
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HttpServletResponse response, Object handler,
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ModelAndView modelAndView) throws Exception {
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System.out.println("HandlerInterceptor1....postHandle");
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}
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//执行Handler完成之后执行
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//应用场景：统一异常处理，统一日志处理
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@Override
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public void afterCompletion(HttpServletRequest request,
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HttpServletResponse response, Object handler, Exception ex)
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throws Exception {
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System.out.println("HandlerInterceptor1....afterCompletion");
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}
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}

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