如何解决 Java resttemplate post having map instead of valid json bad request Error 400

Question

我正在编写一个 Spring 引导应用程序，它应该通过 POST-Request 向我的 REST-API.

发送一个 JSON

我的控制器 class 看起来像：

package com.example.workflow;

import jdk.jfr.ContentType;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class CallController {

    @Autowired
    private CallService callService;

    @GetMapping("/calls")
    public List<Call> getAllCalls(){
        return callService.getAllCallList();
    }

    @PostMapping(value = "/calls")
    public void addCall(@RequestBody Call call){
        callService.addCall(call);
    }
}

我的服务 Class 看起来像：

package com.example.workflow;

import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

@Service
public class CallService {
    private List<Call> callList = new ArrayList<>(Arrays.asList(new Call("33333301","61","Test",
            "Test","Test","Test","Test","Test","Test","Test",
            "Test","Test","Test","Test","Test","Test","Test",
            "Test","Test","Test","Test","Test","Test",
            "Test","Test","Test","Test","Test","Test",
            "Test","Test","Test"),new Call("33333302","61","Test",
            "Test","Test","Test","Test","Test","Test","Test",
            "Test","Test","Test","Test","Test","Test","Test",
            "Test","Test","Test","Test","Test","Test",
            "Test","Test","Test","Test","Test","Test",
            "Test","Test","Test")));

    public List<Call> getAllCallList() {
        return callList;
    }

    public void addCall(Call call) {
        callList.add(call);
    }
}

我的模型 Class Call.java 就像：

package com.example.workflow;

public class Call {
    String tcpident, requestid, mclass, mno, errorstate, datalength, resourceid, ono, opos,
            wpno, opno, bufno, bufpos, carrierid, palletid, palletpos, pno, oposid, stepno,
            maxrecords, boxid, boxpos, mainopos, beltno, cno, boxpno, palletpno,aux1int,
            aux2int,aux1dint,aux2dint,mainpno;

    public Call() {
    }

    public Call(String tcpident, String requestid, String mclass, String mno, String errorstate, String datalength,
                String resourceid, String ono, String opos, String wpno, String opno, String bufno, String bufpos,
                String carrierid, String palletid, String palletpos, String pno, String oposid, String stepno,
                String maxrecords, String boxid, String boxpos, String mainopos, String beltno, String cno,
                String boxpno, String palletpno, String aux1int, String aux2int, String aux1dint,
                String aux2dint, String mainpno) {
        this.tcpident = tcpident;
        this.requestid = requestid;
        this.mclass = mclass;
        this.mno = mno;
....+getter and setter

现在我正在尝试通过 Java 对我的 API 执行 POST-Call。我正在使用 Resttemplate，但我只有一个地图，如果我尝试执行 POST-Call，那么我将得到一个 HTTP 400 状态代码错误请求无效 JSON.

我尝试这样做：

public void post() throws JsonProcessingException {
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        MultiValueMap<String, String> parameters = new LinkedMultiValueMap<>();
        parameters.add("tcpident","1");
        parameters.add("requestid","2");
        parameters.add("mclass","3");
        parameters.add("mno","4");
        parameters.add("errorstate","5");
        parameters.add("datalength","6");
        parameters.add("resourceid","1");
        parameters.add("ono","2");
        parameters.add("opos","3");
        parameters.add("wpno","23");
        parameters.add("opno","ddsds");
        parameters.add("bufno","d");
        parameters.add("bufpos","ds");
        parameters.add("carrierid","dsdd");
        parameters.add("palletid","dsd");
        parameters.add("palletpos","dsd");
        parameters.add("pno","dsd");
        parameters.add("oposid","ds");
        parameters.add("stepno","dsd");
        parameters.add("maxrecords","dsd");
        parameters.add("boxid","dsd");
        parameters.add("boxpos","dsd");
        parameters.add("mainopos","dsds");
        parameters.add("eltno","dsd");
        parameters.add("cno","dsd");
        parameters.add("boxpno","ds");
        parameters.add("palletpno","dsd");
        parameters.add("aux1int","ds");
        parameters.add("aux2int","ds");
        parameters.add("aux1dint","dsdsd");
        parameters.add("aux2dint","dsd");
        parameters.add("mainpno","dsod");
        HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<>(parameters,headers);
        System.out.println("Headers:  "+request.getHeaders());
        System.out.println("Body:    "+request.getBody());
        //Call call = mapper.convertValue(request, Call.class);
        //Call call = restTemplate.postForObject("http://localhost:8080/calls", request,Call.class);
        ResponseEntity<Call[]> response = restTemplate.postForEntity("http://localhost:8080/calls", request, Call[].class);
    }

请求和headers我打印的是：

Headers:  [Content-Type:"application/json"]
Body:    {tcpident=[1], requestid=[2], mclass=[3], mno=[4], errorstate=[5], datalength=[6], resourceid=[1], ono=[2], opos=[3], wpno=[23], opno=[ddsds], bufno=[d], bufpos=[ds], carrierid=[dsdd], palletid=[dsd], palletpos=[dsd], pno=[dsd], oposid=[ds], stepno=[dsd], maxrecords=[dsd], boxid=[dsd], boxpos=[dsd], mainopos=[dsds], eltno=[dsd], cno=[dsd], boxpno=[ds], palletpno=[dsd], aux1int=[ds], aux2int=[ds], aux1dint=[dsdsd], aux2dint=[dsd], mainpno=[dsod]}

如果我通过 POSTMAN 对我的 RESTAPI 执行 POST-Call 它有效，我使用的 JSON 是这样的：

{
  "tcpident": "00110011",
  "requestid": 47,
  "mclass": false,
  "mno": null,
  "errorstate": null,
  "datalength": null,
  "resourceid": null,
  "ono": null,
  "opos": null,
  "wpno": null,
  "opno": null,
  "bufno": null,
  "bufpos": null,
  "carrierid": null,
  "palletid": null,
  "palletpos": null,
  "pno": null,
  "oposid": null,
  "stepno": null,
  "maxrecords": null,
  "boxid": null,
  "boxpos": null,
  "mainopos": null,
  "beltno": null,
  "cno": null,
  "boxpno": null,
  "palletpno": null,
  "aux1int": null,
  "aux2int": null,
  "aux1dint": null,
  "aux2dint": null,
  "mainpno": null
}

Answer 1

尝试过： MultiValueMap parameters = new LinkedMultiValueMap<>(); ？

Answer 2

MultiValueMap 应与 media-type APPLICATION_FORM_URLENCODED 一起发送表单数据。你的情况是 JSON 请求，你可以尝试使用 JSONObject.

示例::

JSONObject jsonObject= new JSONObject();
jsonObject.put("tcpident", "00110011");
jsonObject.put("requestid", "47");
... more params

HttpEntity<String> request = 
  new HttpEntity<String>(jsonObject.toString(), headers);

 restTemplate.postForEntity("http://localhost:8080/calls", request, Call[].class);

如何解决 Java resttemplate post having map instead of valid json bad request Error 400

How to solve Java resttemplate post having map instead of valid json bad request Error 400

java

post

json

resttemplate

spring-boot