SpringMVC獲取頁面表單參數的幾種方式

本文轉載自查看原文 2017-10-29 21:26 24504

以下幾種方式只有在已搭好的SpringMVC環境中，才能執行成功！

首先，寫一個登陸頁面和一個Bean類

<%@ 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博客后台登錄</title>
</head>
<body>
    <form action="${pageContext.request.contextPath}/user/login.do"
        method="post">
        <table>
            <tr>
                <td>用戶名:</td>
                <td><input type="text"  name="userName"></td>
            </tr>
            <tr>
                <td>密碼:</td>
                <td><input type="password"  name="userPwd"></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" value="登陸"></td>
            </tr>
        </table>
    </form>
</body>
</html>

package com.yyx.model;

public class User {
    private String userName;
    private String userPwd;

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserPwd() {
        return userPwd;
    }

    public void setUserPwd(String userPwd) {
        this.userPwd = userPwd;
    }

}

1、直接把表單的參數寫在Controller相應的方法的形參中

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";
    }
}

View Code

控制器中方法的形參String userName，String userPwd名稱必須和登陸頁面的name="userName"，name="userPwd"相同

2.通過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";
    }
}

View Code

控制器中String userName=request.getParameter("userName");String userPwd=request.getParameter("userPwd");的參數名稱必須和登陸頁面的name="userName"，name="userPwd"相同

3.通過一個bean來接收

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";
    }
}

登陸頁面的name="userName"，name="userPwd"必須和Bean類的屬性名稱相同

4.通過json數據接收

<%@ 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博客后台登錄</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
            };//拼裝成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("出錯：" + e);
                }
            });
        });
    });
</script>
</head>
<body>
    <form>
        <table>
            <tr>
                <td>用戶名:</td>
                <td><input type="text" id="userName"></td>
            </tr>
            <tr>
                <td>密碼:</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";
    }
}

View Code

var user={userName:name,userPwd:pwd};//拼裝成json格式語句中userName,userPwd必須和Bean類中屬性名稱相同

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