如何在ResponseEntity中不返回null值？

Question

{
    "id": null,
    "name": "who",
    "newid": "A8C90A53-78F6-4BD6-9628-CBA8FC349C08"
}

{
    "name": "who",
    "newid": "A8C90A53-78F6-4BD6-9628-CBA8FC349C08"
}

...
Map<String, String> responseBody = new HashMap<>();
responseBody.put("name", nameModel.getName());
responseBody.put("newid", nameModel.getNewId());

return new ResponseEntity<>(responseBody, HttpStatus.OK);

====下面是完整的存储库，如果您希望查看更新后的存储库:https://github.com/kidfrom/g2java/tree/main/etc/mssqlserver

控制器/nameController.java

package com.example.mssqlserver.controller;

import com.example.mssqlserver.mapper.NameMapper;
import com.example.mssqlserver.model.NameModel;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

@RestController
public class NameController {

  @Autowired
  private NameMapper nameMapper;

  @GetMapping("api/v1/name")
  public ResponseEntity<?> selectAll() {
    return new ResponseEntity<>(nameMapper.selectAll(), HttpStatus.OK);
  }

  @PostMapping("api/v1/name")
  public ResponseEntity<?> insert(@RequestBody NameModel nameModel) {

    // validator
    if (!nameModel.requestIsValid()) {
      return ResponseEntity.badRequest().build();
    }

    if (nameMapper.insert(nameModel) == 1) {
      return new ResponseEntity<>(nameModel, HttpStatus.OK);
    } else {
      return ResponseEntity.badRequest().build();
    }
  }
}

mapper/namemapper.java

package com.example.mssqlserver.mapper;

import com.example.mssqlserver.model.NameModel;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface NameMapper {

  @Select("SELECT * FROM name")
  public List<NameModel> selectAll();

  @SelectKey(statement = "SELECT NEWID()", keyProperty = "newid", resultType = String.class, before = true)
  @Insert("INSERT INTO name (name, newid) VALUES (#{name}, #{newid})")
//  @Options(useGeneratedKeys = true, keyProperty = "id")
  int insert(NameModel nameModel);
}

model/namemodel.java

package com.example.mssqlserver.model;

public class NameModel {
  private Integer id;
  private String name;
  private String newid;

  public NameModel(Integer id, String name, String newid) {
    this.id = id;
    this.name = name;
    this.newid = newid;
  }

  public Integer getId() {
    return id;
  }

  public void setId(Integer id) {
    this.id = id;
  }

  public String getName() {
    return name;
  }

  public String getNewid() {
    return newid;
  }

  public void setNewid(String newid) {
    this.newid = newid;
  }

  public boolean requestIsValid() {
    if (this.name.isEmpty()) return false;

    return true;
  }
}

Answer 1

我想这个简单的解决办法可以帮助你

https://stackoverflow.com/a/36515285/5108695

由于正在使用Jackson，您必须将其配置为Jackson属性。对于Spring Boot REST服务，您必须在application.properties或application.yml中配置它：

spring.jackson.default-property-inclusion = NON_NULL