_Spring_mvc.zip_spring mvc

package com; import java.util.HashMap; import java.util.Map; import com.UserInfo; import org.springframework.validation.BindException; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.SimpleFormController; public class LoginAction extends SimpleFormController{ private String fail_view; private String success_view; protected ModelAndView onSubmit(Object cmd,BindException ex)throws Exception{ LoginInfo loginInfo=(LoginInfo)cmd; String message=null; Map<String, String> model = new HashMap<String, String>(); if(login(loginInfo)==0){ message="用户名或密码为空"; model.put("msg", loginInfo.getUsername()+message); return new ModelAndView(this.getFail_view(),model); }else if(login(loginInfo)==1){ message="用户名不存在"; model.put("msg", message); return new ModelAndView(this.getFail_view(),model); }else if(login(loginInfo)==2){ message="密码错误"; model.put("msg", message); return new ModelAndView(this.getFail_view(),model); } else{ message="恭喜你，成功登录"; model.put("msg", message); return new ModelAndView(this.getSuccess_view(),model); } } private int login(LoginInfo loginInfo){ if(loginInfo.getUsername()==null||loginInfo.getPassword()==null||loginInfo.getUsername().equals("")){ return 0; } if (!UserInfo.exisitUser(loginInfo.getUsername())) { return 1; } if (!UserInfo.confirmPassword(loginInfo.getUsername(), loginInfo.getPassword())){ return 2; } else{ return 3; } } public String getFail_view(){ return fail_view; } public void setFail_view(String fail_view){ this.fail_view = fail_view; } public String getSuccess_view(){ return success_view; } public void setSuccess_view(String success_view){ this.success_view = success_view; } }