SpringMVC用户登录Demo

package com.example.controller; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.AbstractController; import com.example.entity.User; public class LoginController extends AbstractController { //成功与失败字段 private String successView; private String failView; public String getSuccessView() { return successView; } public void setSuccessView(String successView) { this.successView = successView; } public String getFailView() { return failView; } public void setFailView(String failView) { this.failView = failView; } @Override protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception { //不应该是这样写，但是这样看起来比较容易理解 String username = request.getParameter("username"); String password = request.getParameter("password"); User user = getUser(username, password); //保存相应的参数，通过ModelAndView返回 Map<String ,Object> model=new HashMap<String,Object>(); if(user !=null){ model.put("user", user); return new ModelAndView(getSuccessView(),model); }else{ model.put("error", "用户名或密码输入错误！！！"); return new ModelAndView(getFailView(),model); } } //为了方便直接写的验证方法 public User getUser(String username,String password){ if(username.equals("test") && password.equals("test")){ return new User(username,password); }else{ return null; } } }