Spring MVC获取请求体的json

淩亂°似流年 2022-11-05 08:43 183阅读 0赞

# Spring MVC获取请求体的json #

> 作者：[Bright Xu][]

### 前端ajax部分 ###

前端发送ajax请求

let data = { 
        id:2,
        serial: "万物简史"
    }
    
    $.ajax({ 
        url: "/payment/create",
        type: "POST",
        data: JSON.stringify(data),
        contentType: "application/json",
        success: function(result) { 
            console.log(result)
        }
    })

### 后端控制层部分 ###

后端控制层使用`@RequestBody`获取请求体的数据

@PostMapping("/create")
    public CommonResult<Object> create(@RequestBody Payment payment) { 
        log.info("" + payment);
        int result = paymentService.create(payment);
        log.info("插入结果" + result);
    
        if (result > 0) { 
            return new CommonResult<>(200, "插入数据库成功", result);
        }
        return new CommonResult<>(444, "插入失败");
    }

相关实体类

@Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Payment implements Serializable { 
        private Long id;
        private String serial;
    }

@Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class CommonResult<T> { 
        private Integer code;
        private String message;
        private T data;
    
        public CommonResult(Integer code, String message) { 
            this(code, message, null);
        }
    }

### 最终HTTP报文 ###

HTTP请求报文数据

POST http://[::1]:8001/payment/create HTTP/1.1
    Host: [::1]:8001
    Connection: keep-alive
    Content-Length: 32
    Accept: */*
    X-Requested-With: XMLHttpRequest
    User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36 Edg/88.0.705.74
    Content-Type: application/json
    Origin: http://[::1]:8001
    Sec-Fetch-Site: same-origin
    Sec-Fetch-Mode: cors
    Sec-Fetch-Dest: empty
    Referer: http://[::1]:8001/
    Accept-Encoding: gzip, deflate, br
    Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6,pt;q=0.5
    
    {"id":2,"serial":"万物简史"}

HTTP服务响应报文数据

HTTP/1.1 200
    Content-Type: application/json
    Date: Thu, 04 Mar 2021 08:17:50 GMT
    Keep-Alive: timeout=60
    Connection: keep-alive
    Content-Length: 55
    
    {"code":200,"message":"插入数据库成功","data":1}

[Bright Xu]: https://blog.csdn.net/weixin_44129085