SpringMVC 登陆判断

struts2：extends ActionSupport

@Override
	public String execute() throws Exception {
		User user = userService.getUser(loginName);
		if (user==null) {
			addFieldError("loginName",getText("invalid.loginname"));   用户名错误
			return INPUT;
		}
		else if (!user.getPassword().equals(password)) {
			addFieldError("password", getText("invalid.password"));     密码错误
			return INPUT;
		}
		else {
			sessionMap.put("user",user);
			return SUCCESS;
		}

 SpringMVC:啥都没继承

　　　　　　把对象写在方法的参数列表中，spring会自动创建这个对象

//建议不用实体类接受请求，建议单独定义一个表单类
	@RequestMapping(value="login",method=RequestMethod.POST)
	public String doLogin2(
			@ModelAttribute("form")LoginForm loginForm,//这样转发回表单页面的时候会自动回填数据
			BindingResult result
			){
		if(!loginForm.getLoginName().equals("admin")){
			result.rejectValue("loginName","form", "用户名输入错误");  //reject是驳回的意思
		}else if (!loginForm.getPassword().equals("123456")) {
			result.rejectValue("password","form", "密码输入错误");
		}
		//如果添加了错误信息，则转发回登陆表单页面
		if(result.hasErrors()){
			return "login";
		}
		
		
		System.out.println("登录名："+loginForm.getLoginName());
		System.out.println("密码："+loginForm.getPassword());
		return "hello";
	}

 

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>SpringMVC</title>
<link href="style/style.css" rel="stylesheet" type="text/css"/>

</head>
<body>
										<!-- 对象要和表单绑定，把对象传递过来 -->
	 <form:form action="" method="post" commandName="form">
	 <tr>
	 	<td>登录名：</td>
	 	<td>
	 		<form:input path="loginName" />
	 	</td>
	 </tr>
	 <tr>
	 	<td></td>
	 	<td>
	 		<form:errors path="loginName"/>
	 	</td>
	 </tr>
	 <tr>
	 	<td>密码：</td>
	 	<td>
	 		<form:password path="password" />
	 	</td>
	 </tr>
	  <tr>
	 	<td></td>
	 	<td>
	 		<form:errors path="password"/>
	 	</td>
	 </tr>
	 <tr>
	 	<td></td>
	 	<td>
	 		<input type="submit" value="登陆"/>
	 	</td>
	 </tr>
	 
	 </form:form>
</body>
</html>

 

posted @ 2016-10-09 10:49  Angelinas  阅读(428)  评论(0)  编辑  收藏  举报