SpringMVC获取页面表单参数的几种方式
以下几种方式只有在已搭好的SpringMVC环境中，才能执行成功！
首先，写一个登陆页面和一个Bean类
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>yyx博客后台登录</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/user/login.do"
method="post">
<table>
<tr>
<td>用户名:</td>
<td><input type="text"
name="userName"></td>
</tr>
<tr>
<td>密码:</td>
<td><input type="password" name="userPwd"></td>
</tr>
<tr>
<td colspan="2"><input
type="submit" value="登陆"></td>
</tr>
</table>
</form>
</body>
</html>
package com.yyx.model;public class User {
private String userName;
private String userPwd;</span><span style="color: #0000ff">public</span><span style="color: #000000"> String getUserName() {</br> </span><span style="color: #0000ff">return</span><span style="color: #000000"> userName;</br> }</br></br> </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setUserName(String userName) {</br> </span><span style="color: #0000ff">this</span>.userName =<span style="color: #000000"> userName;</br> }</br></br> </span><span style="color: #0000ff">public</span><span style="color: #000000"> String getUserPwd() {</br> </span><span style="color: #0000ff">return</span><span style="color: #000000"> userPwd;</br> }</br></br> </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setUserPwd(String userPwd) {</br> </span><span style="color: #0000ff">this</span>.userPwd =<span style="color: #000000"> userPwd;</br> }</br>}
1、直接把表单的参数写在Controller相应的方法的形参中
package com.yyx.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/login")
public String loginByUser(String userName, String userPwd) {
System.out.println("userName is:" + userName);
System.out.println("userPwd is:" + userPwd);
return "success";
}
}
控制器中方法的形参String userName，String userPwd名称必须和登陆页面的name="userName"，name="userPwd"相同
2.通过HttpServletRequest接收
package com.yyx.controller;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/login")
public String loginByUser(HttpServletRequest request) {
String userName=request.getParameter("userName");
String userPwd=request.getParameter("userPwd");
System.out.println("userName is:" + userName);
System.out.println("userPwd is:" + userPwd);
return "success";
}
}
控制器中String userName=request.getParameter("userName");String userPwd=request.getParameter("userPwd");的参数名称必须和登陆页面的name="userName"，name="userPwd"相同
3.通过一个bean来接收
package com.yyx.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;import com.yyx.model.User;
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/login")
public String loginByUser(User user) {
System.out.println("userName is:" + user.getUserName());
System.out.println("userPwd is:" + user.getUserPwd());
return "success";
}
}
登陆页面的name="userName"，name="userPwd"必须和Bean类的属性名称相同
4.通过json数据接收
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript"
src="${pageContext.request.contextPath}/static/jquery-3.1.1.min.js"></script>
<title>yyx博客后台登录</title>
<script type="text/javascript">
$(document).ready(function() {
$("#button_submit").click(function() {
var name = $("#userName").val();
var pwd = $("#userPwd").val();
var user = {
userName : name,
userPwd : pwd
};//拼装成json格式
$.ajax({
type : "POST",
url : "${pageContext.request.contextPath}/user/login.do",
data : user,
success : function(data) {
alert("成功");
},
error : function(e) {
alert("出错：" + e);
}
});
});
});
</script>
</head>
<body>
<form>
<table>
<tr>
<td>用户名:</td>
<td><input type="text"
id="userName"></td>
</tr>
<tr>
<td>密码:</td>
<td><input type="password" id="userPwd"></td>
</tr>
<tr>
<td colspan="2"><input type="button" id="button_submit"
value="提交"></td>
</tr>
</table>
</form>
</body>
</html>
package com.yyx.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;import com.yyx.model.User;
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/login")
public String loginByUser(User user) {
System.out.println("userName is:" + user.getUserName());
System.out.println("userPwd is:" + user.getUserPwd());
return "success";
}
}
var user={userName:name,userPwd:pwd};//拼装成json格式 语句中userName,userPwd必须和Bean类中属性名称相同
