通过例子介绍几种自动绑定方式：
SpringmvcServletAPI .java
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| package com.yi.controller;
import com.yi.entity.User;
import com.yi.entity.Users;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
/**
* 数据自动绑定
* Created by Administrator on 2017/4/17.
*/
@Controller
public class SpringmvcServletAPI {
/**
* 将字段与表单字段一一对应就能自动绑定
* @param session
* @return
*/
@RequestMapping(value = "login")
public String login(HttpSession session, String username){
System.out.println("用户名：" + username);
session.setAttribute("username",username);
return "index.jsp";
}
/**
* 将pojo(Javabean)的字段与前端字段一一对应就能自动绑定
* @param request
* @param user
* @return
*/
@RequestMapping(value = "getup")
public String login(HttpServletRequest request, User user){
System.out.println("账号：" + user.getUsername());
System.out.println("密码：" + user.getPassword());
request.setAttribute("user",user);
return "index.jsp";
}
/**
* 将list集合中元素的字段与前端字段一一对应就能自动绑定
* @param request
* @param users
* @return
*/
@RequestMapping(value = "batchinput")
public String login(HttpServletRequest request,Users users){
System.out.println("长度：" + users.getUsers().size());
for (User user:users.getUsers()
) {
System.out.println("账号：" + user.getUsername());
System.out.println("密码：" + user.getPassword());
}
request.setAttribute("list",users.getUsers());
return "index.jsp";
}
/**
* 将数组的字段与前端字段对应就能自动绑定
* @param request
* @param username
* @return
*/
@RequestMapping(value = "arrayinput")
public String login(HttpServletRequest request,String[] username){
for (String name:username
) {
System.out.println("姓名：" + name);
}
request.setAttribute("nameArr",username);
return "index.jsp";
}
}
|
User.java
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| package com.yi.entity;
/**
* 用户信息pojo
* Created by Administrator on 2017/4/18.
*/
public class User {
private Integer uid;
private String username;
private String password;
public User() {
super();
}
public User(Integer uid, String username, String password) {
this.uid = uid;
this.username = username;
this.password = password;
}
public User(String username, String password) {
this.username = username;
this.password = password;
}
public Integer getUid() {
return uid;
}
public void setUid(Integer uid) {
this.uid = uid;
}
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;
}
@Override
public String toString() {
return "User{" +
"uid=" + uid +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
}
|
Users.java
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| package com.yi.entity;
import java.util.ArrayList;
import java.util.List;
/**
* 封装User到集合中，用户数据绑定
* Created by Administrator on 2017/4/18.
*/
public class Users {
List<User> users = new ArrayList<>();
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
}
|
index.jsp
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| <%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2017/4/17
Time: 20:28
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<h3>SpringMVC自动绑定字段</h3><hr>
${username},欢迎回来...<br>
<h3>SpringMVC自动绑定javabean</h3><hr>
${requestScope.user.username},欢迎回来...<br>
${requestScope.user.password},这是密码<br>
<h3>SpringMVC自动绑定集合</h3><hr>
<c:forEach items="${list}" var="user">
${user.username},欢迎回来...<br>
${user.password},这是密码<br>
</c:forEach>
<h3>SpringMVC自动绑定数组</h3><hr>
<c:forEach items="${nameArr}" var="name">
${name},欢迎回来...<br>
</c:forEach>
</body>
</html>
|
login.jsp
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| <%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2017/4/17
Time: 21:45
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>登录</title>
</head>
<body>
<h3>SpringMVC自动绑定字段</h3><hr>
<form action="${pageContext.request.contextPath}/login.mvc" method="post">
账号：<input type="text" name="username"><br><br>
<input type="submit">
</form>
<h3>SpringMVC自动绑定javabean</h3><hr>
<form action="${pageContext.request.contextPath}/getup.mvc" method="post">
账号：<input type="text" name="username"><br><br>
密码：<input type="text" name="password"><br><br>
<input type="submit">
</form>
<h3>SpringMVC自动绑定集合</h3><hr>
<form action="${pageContext.request.contextPath}/batchinput.mvc" method="post">
账号：<input type="text" name="users[0].username"><br><br>
密码：<input type="text" name="users[0].password"><br><br>
账号：<input type="text" name="users[1].username"><br><br>
密码：<input type="text" name="users[1].password"><br><br>
账号：<input type="text" name="users[2].username"><br><br>
密码：<input type="text" name="users[2].password"><br><br>
<input type="submit">
</form>
<h3>SpringMVC自动绑定数组</h3><hr>
<form action="${pageContext.request.contextPath}/arrayinput.mvc" method="post">
账号：<input type="text" name="username"><br><br>
账号：<input type="text" name="username"><br><br>
<input type="submit">
</form>
</body>
</html>
|
结果：
