REST POST到Java应用程序返回JSON响应，其中一些字段为空

Question

我正在使用Postman进入一个JSON POST到本地主机，我有一个Springboot应用程序在运行。

POST是:

{"applicantName":"On Gaber","amount":"5000","asset":"Car","creditScore":"602"}

控制器

@RestController
public class LoanSubmissionController {
private LoanService loanService;
@Autowired
public LoanSubmissionController(LoanService loanService) {
    this.loanService = loanService;
}
@RequestMapping(method = RequestMethod.POST)
@ResponseStatus(HttpStatus.CREATED)
LoanApplicationDTO create(
        @RequestBody @Valid LoanApplicationDTO loanApplicationDTO) {
    return loanService.create(loanApplicationDTO);
}

服务类:

@Service
public class LoanSubmissionService implements LoanService {
@Autowired
private final LoanApplicationRepository repository;
@Autowired
public LoanSubmissionService(LoanApplicationRepository repository) {
    this.repository = repository;
}
// @Override
public LoanApplicationDTO create(LoanApplicationDTO loanApplicationDTO) {
    LoanApplication persisted = LoanApplication.getBuilder()
            .applicantName(loanApplicationDTO.getApplicantName())
            .amount(loanApplicationDTO.getAmount()).build();
    persisted = repository.save(persisted);
    return convertToDTO(persisted);
}

库类:

public interface LoanApplicationRepository extends
    MongoRepository<LoanApplication, String> {
@SuppressWarnings("unchecked")
LoanApplication save(LoanApplication saved);

DTO类:

package com.liquidlogic.loanprocessor.web;
public final class LoanApplicationDTO {
private String id;
private String applicantName;
private String amount;
private String asset;
private String creditScore;
public LoanApplicationDTO() {
}
public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getApplicantName() {
    return applicantName;
}
public void setApplicantName(String applicantName) {
    this.applicantName = applicantName;
}
public String getAmount() {
    return amount;
}
public void setAmount(String amount) {
    this.amount = amount;
}
public String getAsset() {
    return asset;
}
public void setAsset(String asset) {
    this.asset = asset;
}
public String getCreditScore() {
    return creditScore;
}
public void setCreditScore(String creditScore) {
    this.creditScore = creditScore;
}
}

域类:

import org.springframework.data.annotation.Id;
import org.springframework.util.Assert;
public class LoanApplication implements Application {
@Id
private String id;
private String applicantName;
private String amount;
private String asset;
private String creditScore;
public LoanApplication() {
}
private LoanApplication(ApplicationBuilder builder) {
    Assert.notNull(builder);
    this.applicantName = builder.applicantName;
    this.amount = builder.amount;
    this.asset = builder.asset;
    this.creditScore = builder.creditScore;
}
public static ApplicationBuilder getBuilder() {
    return new ApplicationBuilder();
}
public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getAmount() {
    return amount;
}
public void setAmount(String amount) {
    this.amount = amount;
}
public String getAsset() {
    return asset;
}
public void setAsset(String asset) {
    this.asset = asset;
}
public String getCreditScore() {
    return creditScore;
}
public void setCreditScore(String creditScore) {
    this.creditScore = creditScore;
}
public void setApplicantName(String applicantName) {
    this.applicantName = applicantName;
}
public String getApplicantName() {
    return applicantName;
}
@Override
public String toString() {
    return "LoanApplication [id=" + id + ", applicantName=" + applicantName
            + ", amount=" + amount + ", asset=" + asset + ", creditScore="
            + creditScore + "]";
}
public void update(String applicantName, String amount, String asset,
        String creditScore) {
    this.applicantName = applicantName;
    this.amount = amount;
    this.asset = asset;
    this.creditScore = creditScore;
}
public static class ApplicationBuilder {
    private String applicantName;
    private String amount;
    private String asset;
    private String creditScore;
    private ApplicationBuilder() {
    }
    public ApplicationBuilder applicantName(String applicantName) {
        this.applicantName = applicantName;
        return this;
    }
    public ApplicationBuilder amount(String amount) {
        this.amount = amount;
        return this;
    }
    public ApplicationBuilder asset(String asset) {
        this.asset = asset;
        return this;
    }
    public ApplicationBuilder creditScore(String creditScore) {
        this.creditScore = creditScore;
        return this;
    }
    public LoanApplication build() {
        LoanApplication build = new LoanApplication(this);
        return build;
    }
}
}

Springboot会自动连接并配置整个应用程序。不需要web.xml或Spring配置，Springboot会完成这一切。

application.properties:

logging.level.org.springframework.web=DEBUG
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017

JSON响应:

{
  "id": "55c39c23f04a07251bc598b0",
  "applicantName": "On Gaber",
  "amount": "5000",
  "asset": null,
  "creditScore": null
}

简略Eclipse控制台输出:

: Started LoanApplicationProcessor in 5.258 seconds (JVM running for 6.012)
: Successfully completed request

domain和DTO中的所有字段都是String类型。我不明白为什么"asset"one_answers"creditscore"字段是空的。什么好主意吗?

Answer 1

您没有将这些字段的值分配给public LoanApplicationDTO create(LoanApplicationDTO loanApplicationDTO)方法中的新实体，因此这些值不会被持久化。