Maven + Spring mvc：前端向后端传递数据

作者: 张中华 | 来源:发表于2018-11-26 22:08 被阅读14次

Maven + Spring mvc：后端向前端传递数据
Maven + Spring mvc：前端向后端传递数据
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根据前一篇文章，Maven + Spring mvc： Hello World, 已经介绍了spring mvc的简单使用，此片文章介绍一下，如何利用前端将数据传递到后端。
添加依赖引用：

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.7</version>
</dependency>

前端代码：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script type="text/javascript">
    $(function(){
        $("button").click(function(){
            $.ajax({
                type:"POST",
                url:"helloworld",
                contentType:"application/json;charset=utf-8",
                dataType:"json",
                data:JSON.stringify({
                        "Name": "test", 
                        "Password": "123456", 
                        "Address": "SD"                     
                }),
                success:function(){
                    console.log("success");
                }
            });
        });
    })
</script>
</head>
<body>
    <h1>hello world.</h1>
    <button>Click</button>
</body>

</html>

后端代码，实体类：

package com.iotzzh.entity;

import com.fasterxml.jackson.annotation.JsonProperty;

public class User {
     @JsonProperty(value="Name")
        private String Name;

        @JsonProperty(value="Password")
        private String Password;

        @JsonProperty(value="Address")
        private String Address;

        public String getName() {
            return Name;
        }
        public void setName(String name) {
            Name = name;
        }
        public String getPassword() {
            return Password;
        }
        public void setPassword(String password) {
            Password = password;
        }
        public String getAddress() {
            return Address;
        }
        public void setAddress(String address) {
            Address = address;
        }


        @Override
        public String toString() {
            // TODO Auto-generated method stub
            return "User:" + Name + "\n" + "Password:" + Password + 
                    "\n" + "Address:" + Address;
        }

}

后端代码，controller 代码：

package com.iotzzh.controller;

import org.springframework.stereotype.Controller;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.iotzzh.entity.User;


@Controller
@RequestMapping("/hello")

public class HelloWorldController {

    @RequestMapping(value="/helloworld", method=RequestMethod.POST, produces="application/json;charset=utf-8")
    @ResponseBody
    public void helloworld(@RequestBody User user) {
        System.out.println("success");
        System.out.println(user);
    }
    
     @RequestMapping("/helloworld")
        public String helloworld(){
            System.out.println("nihao");
            return "hello";
        }

}

测试：