<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!--
springmvc的核心servlet
第一种：[servlet-name]-servlet.xml ,比如：springmvc-servlet.xml
第二种是：改变命名空间 namespace
必须配置文件在放入在web-inf目录下。
第三种是通过:contextConfigLocation
-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>namespace</param-name>
<param-value>imoocmvc</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app><?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- 配置自定义扫描包 -->
<context:component-scan base-package="com.imooc.web"></context:component-scan>
<!-- 拦截器的注册 -->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/user/**"/>
<bean class="com.imooc.core.LogInterceptor"></bean>
</mvc:interceptor>
<mvc:interceptor>
<!--<mvc:mapping path="/user/search"/>
<mvc:mapping path="/user/updatepwd"/>
<mvc:mapping path="/user/updateheaderPic"/>-->
<!--<mvc:mapping path="/user/*"></mvc:mapping>-->
<mvc:mapping path="/user/**"></mvc:mapping>
<!--exclude-mapping在所有拦截中进行排除，一般在通配符会有意义。-->
<mvc:exclude-mapping path="/user/updatepwd"></mvc:exclude-mapping>
<mvc:exclude-mapping path="/user/updatebackground/*"></mvc:exclude-mapping>
<bean class="com.imooc.core.LoginInterceptor"></bean>
</mvc:interceptor>
</mvc:interceptors>
<!-- 映射物理路径 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>Ps1：Spring配置文件，如果没有用到该标签，则该标签在头文件中是变成灰色的。
Ps2：
user/* 子集
user/** 所有集
Ps3：多个拦截器配置按照顺序依次拦截（递归执行顺序）。
package com.imooc.bean;
public class User {
private String account;
private String password;
// 省略 getter setter
}package com.imooc.web;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class IndexController {
@RequestMapping("/index")
public String index(){
return "index";
}
}package com.imooc.web;
import com.imooc.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import javax.servlet.http.HttpSession;
@Controller
public class LoginController {
@RequestMapping("/login")
public String login(){
return "login";
}
@RequestMapping("/logined")
public String logined(@RequestParam("account")String account,
@RequestParam("password")String password,
HttpSession session){
if(account.equals("xuke") && password.equals("123456")) {
User user = new User();
user.setAccount(account);
user.setPassword(password);
session.setAttribute("session_user",user);
return "redirect:user/search";
}else{
return "redirect:login";
}
}
}package com.imooc.web;
import com.imooc.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpSession;
@Controller
@RequestMapping("/user")
public class UserController {
//查询用户
@RequestMapping("/search")
public String search(HttpSession session){
System.out.println("2:----keketip====---search---");
return "user/search";
}
//修改密码
@RequestMapping("/updatepwd")
public String updatepwd(HttpSession session){
System.out.println("2:keketip====---updatepwd---");
return "user/updatepwd";
}
//修改头像
@RequestMapping("/updateheaderPic")
public String updateheaderPic(HttpSession session){
System.out.println("2:keketip====---updateheaderPic");
return "user/updateheaderPic";
}
//修改背景图片
@RequestMapping("/updatebackground/{id}")
public String updatebackground(HttpSession session){
System.out.println("2:keketip====---updatebackground");
return "user/test";
}
}拦截器：
package com.imooc.core;
import com.imooc.bean.User;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginInterceptor implements HandlerInterceptor {
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
User user = (User)request.getSession().getAttribute("session_user");
if(user==null) {
System.out.println("LOGIN-1:keketip--preHandle===>");
response.sendRedirect(request.getContextPath()+"/login");
return false;
}
return true; // 是否会终止所有的请求
}
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("LOGIN-3:-----keketip--login==postHandle===>");
}
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("LOGIN-4:--->keketip=--afterCompletion===>");
}
}package com.imooc.core;
import com.imooc.bean.User;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LogInterceptor implements HandlerInterceptor {
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("LOG------>1:-----keketip====preHandle===>");
System.out.println("keketip====当前执行的类是:"+handler.getClass());
return true; // 是否会终止所有的请求
}
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("LOG------>3:-----keketip====postHandle===>");
}
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("LOG------>4:--->keketip====afterCompletion===>");
}
}Ps：如果preHandle返回为false，则业务方法、postHandle、afterCompletion都不会再执行了。