Springboot中的json解析错误 [英] json parsing error in Springboot

问题描述

我有一个简单的 springboot 程序，它接受一个 json 并打印它.主要目的是做 json 验证器包的使用，但当前的上下文是在基本的请求解析上.问题是当我尝试将输入请求映射到类实体时，它给出了以下错误:org.springframework.http.converter.HttpMessageNotReadableException"，.

I have a simple springboot program which takes a json and prints it. The main intention was to do json validator package usage, but the current context is on the basic request parsing. The problem is when i tryy to map the input request into an class entity, it is giving the below error : "org.springframework.http.converter.HttpMessageNotReadableException",.

• 控制器(Hello.java):

    @RequestMapping(method = RequestMethod.POST , consumes = "application/json")
    public ResponseEntity<String> welcome(
            @RequestBody DemoEntity demoEntity )
    {
        System.out.println(demoEntity.getName());
        String response ="success";
        return new ResponseEntity<>(response, HttpStatus.CREATED);
    }
}

Java 类实体:

公共类DemoEntity实现Serializable {

public class DemoEntity implements Serializable {

    @JsonProperty("name")
    private String name;
    @JsonProperty("no")
    private int no;

    public int getNo() {
        return no;
    }

    public void setNo(int no) {
        this.no = no;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    DemoEntity(String name)
    {
        this.name = name;
    }
}

• 完全异常:

{时间戳":1497594485418，状态":400，"error": "错误的请求","异常": "org.springframework.http.converter.HttpMessageNotReadableException",消息":JSON 解析错误:数值中出现意外字符('-'(代码 45)):预期数字 (0-9) 跟随减号，对于有效数值；嵌套异常是 com.fasterxml.jackson.core.JsonParseException: 数值中的意外字符 ('-' (code 45)):预期数字 (0-9) 跟随减号，对于有效数值\n 在 [Source: java.io.PushbackInputStream@75be93a7; line: 1, 列: 3]",路径":/欢迎"}

{ "timestamp": 1497594485418, "status": 400, "error": "Bad Request", "exception": "org.springframework.http.converter.HttpMessageNotReadableException", "message": "JSON parse error: Unexpected character ('-' (code 45)) in numeric value: expected digit (0-9) to follow minus sign, for valid numeric value; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('-' (code 45)) in numeric value: expected digit (0-9) to follow minus sign, for valid numeric value\n at [Source: java.io.PushbackInputStream@75be93a7; line: 1, column: 3]", "path": "/welcome" }

示例输入请求正文:{"name":"Roopesh", "no":123123}

Sample input request in the body : {"name":"Roopesh", "no":123123}

推荐答案

您发送了错误的请求.使用 curl -X POST localhost:8090/one -H 'content-type: application/json;charset=UTF-8' -H 'name: test' -H 'postman-token: 8e87369d-e2e2-ab25-eadd-f40f0682e593' -d '{"name":"Roopesh", "no":"123123"}'

You send incorrect request. Use curl -X POST localhost:8090/one -H 'content-type: application/json;charset=UTF-8' -H 'name: test' -H 'postman-token: 8e87369d-e2e2-ab25-eadd-f40f0682e593' -d '{"name":"Roopesh", "no":"123123"}'

1. 不要发送demoEntity=.正文应仅包含 json 本身.
2. 使用 -d 键发送数据.-F 用于多部分主体.有点不同.
1. Don't sent demoEntity=. Body should contains just json itself.
2. Use -d key to send data. -F is for multipart body. It is a little bit different.

这篇关于Springboot中的json解析错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！