标签:org spring boolean script app log 通过 利用 拦截器
package com.utils;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
/**
* @description 利用spring框架提供的HandlerInterceptorAdapter,实现自定义拦截器
*/
public class UserLoginInterceptorBySpring extends HandlerInterceptorAdapter {
// 在业务处理器处理请求之前被调用
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//把登录的用户名放到Session会话里,用户登录时通过获取会话username对象判断用户之前有没有登录系统
String username = (String) request.getSession().getAttribute("username");
if (null == username) {
// 跳转到登录页面
request.getRequestDispatcher("/login").forward(request, response);
return false;
} else {
return true;
}
}
// 在业务处理器处理请求完成之后,生成视图之前执行
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("postHandle...");
}
// 在DispatcherServlet完全处理完请求之后被调用,可用于清理资源
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("afterCompletion...");
}
}
**********************
xml配置文件
<mvc:interceptors>
<mvc:interceptor>
<!-- 定义拦截的路由,com.controller包下的所有Controller -->
<mvc:mapping path="/**" />
<mvc:exclude-mapping path="/login" />
<mvc:exclude-mapping path="/reg" />
<mvc:exclude-mapping path="/register" />
<!-- 拦截方法 -->
<bean class="com.utils.UserLoginInterceptorBySpring"/>
</mvc:interceptor>
</mvc:interceptors>
************************
//登录时的控制器
package com.controller;
import com.dao.Sys_userDAO;
import com.model.Sys_user;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
/**
* Create with IntelliJ iDEA.
*
* @Auther:哈
* @Date:2020/9/23 9:30
* 接收前端的用户名和密码,并进行判断,然后把用户名放到Session会话里
*/
@Controller
public class Login_checkController {
@RequestMapping("/login")
public String login(String userName, String nuse, HttpServletRequest req){
String username = userName;//接收用户名
String password = nuse;//接收密码
Sys_user result = dao.loginCheck(username,password);//调用方法,校验用户名密码是否正确
if (result!=null){
req.getSession().setAttribute("username",username);//把用户名放到Session会话作用域中
return "main";
}else {
return "redirect:/index.jsp";
}
}
}
利用spring框架提供的HandlerInterceptorAdapter,实现自定义拦截器
标签:org spring boolean script app log 通过 利用 拦截器
原文地址:https://www.cnblogs.com/beliveme/p/13906014.html