SpringMVC基础-10-拦截器

2021-05-08 13:33

阅读：711

标签：映射 post请求 tpm def www back bool str char

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代码示例：

InterceptorTestController:

 1 package com.atguigu.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 
 6 /**
 7  * @Title: InterceptorTestController
 8  * @Description:
 9  * @Author:
10  * @Version: 1.0
11  * @create 2020/6/22 11:08
12  */
13 @Controller
14 public class InterceptorTestController {
15 
16     @RequestMapping("/test01")
17     public String test01(){
18         System.out.println("test01...");
19         //int i =  10/0;
20         return "success";
21     }
22 }

MyFirstInterceptor:

 1 package com.atguigu.controller;
 2 
 3 import org.springframework.web.servlet.HandlerInterceptor;
 4 import org.springframework.web.servlet.ModelAndView;
 5 
 6 import javax.servlet.http.HttpServletRequest;
 7 import javax.servlet.http.HttpServletResponse;
 8 
 9 /**
10  * 1.实现 HandlerInterceptor接口
11  * 2.在SpringMVC配置文件中注册注册这个拦截器
12  *      配置这个拦截器拦截哪些请求的目标方法
13  */
14 public class MyFirstInterceptor implements HandlerInterceptor {
15 
16     /**
17      * 目标方法之前运行
18      */
19     @Override
20     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
21         System.out.println("MyFirstInterceptor...preHandle...");
22         return true;
23     }
24 
25     @Override
26     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
27         System.out.println("MyFirstInterceptor...postHandle...");
28     }
29 
30     @Override
31     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
32         System.out.println("MyFirstInterceptor...afterCompletion...");
33     }
34 }

MySecondInterceptor:

 1 package com.atguigu.controller;
 2 
 3 import org.springframework.web.servlet.HandlerInterceptor;
 4 import org.springframework.web.servlet.ModelAndView;
 5 
 6 import javax.servlet.http.HttpServletRequest;
 7 import javax.servlet.http.HttpServletResponse;
 8 
 9 /**
10  * @Title: MySecondInterceptor
11  * @Description:
12  * @Author:
13  * @Version: 1.0
14  * @create 2020/6/22 12:58
15  */
16 public class MySecondInterceptor implements HandlerInterceptor {
17 
18     /**
19      * 目标方法之前运行
20      */
21     @Override
22     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
23         System.out.println("MySecondInterceptor...preHandle...");
24         return true;
25     }
26 
27     @Override
28     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
29         System.out.println("MySecondInterceptor...postHandle...");
30     }
31 
32     @Override
33     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
34         System.out.println("MySecondInterceptor...afterCompletion...");
35     }
36 }

springmvc.xml:

 1 xml version="1.0" encoding="UTF-8"?>
 2 beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
 7         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 8         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
 9 
10     context:component-scan base-package="com.atguigu">context:component-scan>
11     
12     bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
13         property name="prefix" value="/WEB-INF/pages/">property>
14         property name="suffix" value=".jsp">property>
15     bean>
16 
17     
18     mvc:default-servlet-handler/>
19     
20     mvc:annotation-driven/>
21 
22     
23     mvc:interceptors>
24         
25         bean class="com.atguigu.controller.MyFirstInterceptor">bean>
26 
27         
28         mvc:interceptor>
29             
30             mvc:mapping path="/test01"/>
31             bean class="com.atguigu.controller.MySecondInterceptor">bean>
32         mvc:interceptor>
33     mvc:interceptors>
34 
35 beans>

web.xml:

 1 DOCTYPE web-app PUBLIC
 2         "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 3         "http://java.sun.com/dtd/web-app_2_3.dtd" >
 4 
 5 web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
 6          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 7          id="WebApp_ID" version="3.0">
 8     display-name>10.SpringMVC_interceptordisplay-name>
 9     welcome-file-list>
10         welcome-file>index.jspwelcome-file>
11     welcome-file-list>
12 
13     
15     servlet>
16         servlet-name>springDispatcherServletservlet-name>
17         servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
18         init-param>
19             
20             param-name>contextConfigLocationparam-name>
21             param-value>classpath:springmvc.xmlparam-value>
22         init-param>
23         load-on-startup>1load-on-startup>
24     servlet>
25 
26     
27     servlet-mapping>
28         servlet-name>springDispatcherServletservlet-name>
29         url-pattern>/url-pattern>
30     servlet-mapping>
31 
32     
33     
34     filter>
35         filter-name>CharacterEncodingFilterfilter-name>
36         filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
37         
38         init-param>
39             param-name>encodingparam-name>
40             
41             param-value>utf-8param-value>
42         init-param>
43         init-param>
44             
45             param-name>forceEncodingparam-name>
46             param-value>trueparam-value>
47         init-param>
48     filter>
49     filter-mapping>
50         filter-name>CharacterEncodingFilterfilter-name>
51         url-pattern>/*url-pattern>
52     filter-mapping>
53 
54     
55     filter>
56         filter-name>HiddenHttpMethodFilterfilter-name>
57         filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilter-class>
58     filter>
59     filter-mapping>
60         filter-name>HiddenHttpMethodFilterfilter-name>
61         url-pattern>/*url-pattern>
62     filter-mapping>
63     
66 
67 web-app>

index.jsp:

 1 @ page language="java" contentType="text/html; charset=UTF-8"
 2          pageEncoding="UTF-8"%>
 3 DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 html>
 5 head>
 6     meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7     title>Insert title heretitle>
 8     
 9         pageContext.setAttribute("ctp", request.getContextPath());
10     %>
11 head>
12 body>
13     a href="${ctp}/test01">test01a>
14 body>
15 html>

success.jsp:

 1 @ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 html>
 5 head>
 6 meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 title>Insert title heretitle>
 8 head>
 9 body>
10 
11 System.out.println("success.jsp....");
12 %>
13 h1>成功！h1>
14 body>
15 html>

SpringMVC基础-10-拦截器

标签：映射 post请求 tpm def www back bool str char

原文地址：https://www.cnblogs.com/116970u/p/13178137.html

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SpringMVC基础-10-拦截器

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