spring mvc: 密码框

以user为例，包含username, password字段.

user.java

public class User {

   private String username;

   private String password;

   public String getUsername() {

      return username;

   }

   public void setUsername(String username) {

      this.username = username;

   }

   public String getPassword() {

      return password;

   }

   public void setPassword(String password) {

      this.password = password;

   }

}

UserController.java代码

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.ModelAttribute;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.ui.ModelMap;

@Controller

public class UserController {

   @RequestMapping(value = "/user", method = RequestMethod.GET)

   public ModelAndView user() {

      return new ModelAndView("user_index", "command", new User());

   }

   @RequestMapping(value = "/addUser", method = RequestMethod.POST)

   public String addUser(@ModelAttribute("SpringWeb")User user,

      ModelMap model) {

      model.addAttribute("username", user.getUsername());

      model.addAttribute("password", user.getPassword());

      return "user_add";

   }

}

这里的第一个服务方法user()，我们已经在ModelAndView对象中传递了一个名称为“command”的空User对象，因为如果在JSP文件中使用<form:form>标签，spring框架需要一个名称为“command”的对象。所以当调用user()方法时，它返回user.jsp视图。

第二个服务方法addUser()将根据URL => HelloWeb/addUser 上的POST方法请求时调用。根据提交的信息准备模型对象。最后从服务方法返回“userlist”视图，这将呈现userlist.jsp视图。

user_index.jsp 的代码如下所示

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%>

<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>添加user信息</title>

</head>

<body>

<form:form method="post" action="/hello/addUser">

<table>

	<tr>

		<td><form:label path="username">姓名:</form:label></td>

		<td><form:input path="username" /></td>

	</tr>

	<tr>

		<td><form:label path="password">密码</form:label></td>

		<td><form:password path="password"/></td>

	</tr>

	<tr>

		<td colspan="2">

			<input type="submit" value="提交表单"/>

		</td>

	</tr>

</table>

</form:form>

</body>

</html>

　　user_add.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%>

<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<%@ page isELIgnored="false" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>用户信息显示</title>

</head>

<body>

<table>

	<tr>

		<td>用户名</td>

		<td>${username}</td>

	</tr>

	<tr>

		<td>密码</td>

		<td>${password}</td>

	</tr>

</table>

</body>

</html>

如图：

巴特西

spring mvc: 密码框

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