Spring boot post rest調用“缺少所需的請求正文”

Question

我有一個帶有 Spring Boot 后端的簡單的有角度的學校項目。 每當我嘗試通過休息調用從前端向后端發送內容時，我都會收到“缺少所需的請求正文”

前端代碼

export class TestController {

  private usersUrl: string;
  private authorizationMessage: AuthorizationMessage;

  constructor(
    private httpClient: HttpClient
  ) {
    this.usersUrl = 'http://localhost:8080/fraud/';
  }

  public testDatabase() {
    this.authorizationMessage = new AuthorizationMessage();
    this.authorizationMessage.bitMap = 1;
    this.authorizationMessage.carAcceptorName = 'mitchel';
    this.authorizationMessage.cardAcceptorId = 'cardAcceptorId';
    this.authorizationMessage.cardAcceptorTerminalId = 8762344;
    this.authorizationMessage.cardSequenceNumber = 12;
    this.authorizationMessage.checkInformation = 'check info test';
    this.authorizationMessage.messageTypeIdentifier = 3;
    this.authorizationMessage.posDataCode = 'posDataCode';
    this.authorizationMessage.primaryAccountNumber = 29485819;
    this.authorizationMessage.processingCode = 90;
    this.authorizationMessage.responseCode = 0;
    this.authorizationMessage.systemTraceAuditNumber = 65;
    this.authorizationMessage.transactionAmount = 45;
    this.authorizationMessage.transmissionDateAndTime = new Date();

    console.log(this.authorizationMessage);

    return this.httpClient.post(this.usersUrl + 'authorizeTransaction', this.authorizationMessage).subscribe();
  }
}

前端的 AuthorizationMessage 類

export class AuthorizationMessage {
  messageTypeIdentifier: number;
  bitMap: number;
  processingCode: number;
  transactionAmount: number;
  transmissionDateAndTime: Date;
  systemTraceAuditNumber: number;
  responseCode: number;
  cardAcceptorId: string;
  posDataCode: string;
  cardAcceptorTerminalId: number;
  carAcceptorName: string;
  primaryAccountNumber: number;
  checkInformation: string;
  cardSequenceNumber: number;
}

后端代碼

@RestController
@RequestMapping(value= "/fraud", produces = MediaType.APPLICATION_JSON_VALUE)
@Slf4j
public class FraudController {

    private RuleEngine ruleEngine;

    @Autowired
    public FraudController(RuleEngine ruleEngine){
        this.ruleEngine = ruleEngine;
    }

    @PostMapping(value = "/authorizeTransaction", consumes = MediaType.APPLICATION_JSON_VALUE)
    public void authorizeTransaction(@RequestBody @Valid AuthorizationMessage authorizationMessage){
        TransactionContext transactionContext = getTransactionContext(authorizationMessage);
        transactionContext = ruleEngine.evaluateTransaction(transactionContext);
        updateTransactionHistory(authorizationMessage);
    }
}

后台授權消息

@Data
@NoArgsConstructor
@AllArgsConstructor
public class AuthorizationMessage implements Serializable {
    private Integer messageTypeIdentifier;
    private Integer bitMap;
    private Integer processingCode;
    private Long transactionAmount;
    private LocalDateTime transmissionDateAndTime;
    private Integer systemTraceAuditNumber;
    private Integer responseCode;
    private String cardAcceptorId;
    private String posDataCode;
    private Integer cardAcceptorTerminalId;
    private String carAcceptorName;
    private Long primaryAccountNumber;
    private String checkInformation;
    private Integer cardSequenceNumber;
}

確切的輸出是

2019-12-30 15:09:18.341  WARN 89353 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public void nl.han.ica.oose.s1920.g9.frauddetection.controllers.FraudController.authorizeTransaction(nl.han.ica.oose.s1920.g9.frauddetection.core.authorizationmessage.AuthorizationMessage)]

我不知道為什么找不到請求正文。 也許我忘記了某些東西，某處的某種設置或配置，或者序列化沒有像我期望的那樣工作......希望有人可以提供幫助。

Answer 1

解決了：

模塊缺少用於驗證 cors 的 WebConfig。 將其添加到項目中並按預期工作。