API返回對象ResponseDTO
- result:調用是否成功
- code:狀態碼
- msg:結果消息
- data:響應數據,泛型
,可以接收任何數據類型
ResponseDTO源碼如下:
package com.study.web.dto;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class ResponseDTO{
/**
* 調用是否成功
*/
@Builder.Default
private boolean result = true;
/**
* 狀態碼
*/
@Builder.Default
private String code = "200";
/**
* 結果消息
*/
@Builder.Default
private String msg = "";
/**
* 響應數據
*/
private T data;
/**
*返回成功結果,無返回結果集
*
* @return ResponseDTO
*/
public staticResponseDTO success() {
return success(null);
}
/**
*返回成功結果,有返回結果集
*
* @return ResponseDTO
*/
@SuppressWarnings("unchecked")
public staticResponseDTO success(T data) {
return ((ResponseDTO) ResponseDTO.builder().result(true).code("200").msg("").data(data).build());
}
/**
*返回失敗結果,無返回結果集
*
* @return ResponseDTO
*/
public staticResponseDTO error() {
return error(null);
}
/**
*返回失敗結果,有返回結果集
*
* @return ResponseDTO
*/
@SuppressWarnings("unchecked")
public staticResponseDTO error(T data) {
return ((ResponseDTO) ResponseDTO.builder().result(false).data(data).build());
}
}
示例代碼:
1、無返回Data
/**
* 無返回Data
*/
@PostMapping("/testVoid")
public ResponseDTO<void> testVoid(){
ResponseDTO<void> result = ResponseDTO.success();
try {
//業務代碼
studyService.testVoid();
} catch (Exception e) {
log.error("處理異常", e);
result.setResult(false);
result.setCode("500");
result.setMsg("異常");
}
return result;
}
/<void>/<void>
2、返回對象
/**
* 返回對象
*/
@PostMapping("/testString")
public ResponseDTO<string> testString(){
ResponseDTO<string> result = ResponseDTO.success();
try {
//業務代碼
String data = studyService.testString();
result.setData(data);
} catch (Exception e) {
log.error("處理異常", e);
result.setResult(false);
result.setCode("500");
result.setMsg("異常");
}
return result;
}
/<string>/<string>
3、返回對象列表
/**
* 返回對象列表
*/
@PostMapping("/testList")
public ResponseDTO<list>> testList(){
ResponseDTO<list>> result = ResponseDTO.success();
try {
//業務代碼
List<string> data = studyService.testList();
result.setData(data);
} catch (Exception e) {
log.error("處理異常", e);
result.setResult(false);
result.setCode("500");
result.setMsg("異常");
}
return result;
}
/<string>/<list>/<list>
在這裡我以String型來代表任何類型的對象。
建議:controller層,接口級代碼,不要涉及過多業務代碼,業務代碼都放在service層處理並返回。
controller層源碼:
package com.study.web.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.study.service.StudyService;
import com.study.web.dto.ResponseDTO;
import lombok.extern.slf4j.Slf4j;
@RestController
@Slf4j
@RequestMapping("/study")
public class StudyController {
@Autowired
StudyService studyService;
/**
* 無返回Data
*/
@PostMapping("/testVoid")
public ResponseDTO<void> testVoid(){
ResponseDTO<void> result = ResponseDTO.success();
try {
//業務代碼
studyService.testVoid();
} catch (Exception e) {
log.error("處理異常", e);
result.setResult(false);
result.setCode("500");
result.setMsg("異常");
}
return result;
}
/**
* 返回對象
*/
@PostMapping("/testString")
public ResponseDTO<string> testString(){
ResponseDTO<string> result = ResponseDTO.success();
try {
//業務代碼
String data = studyService.testString();
result.setData(data);
} catch (Exception e) {
log.error("處理異常", e);
result.setResult(false);
result.setCode("500");
result.setMsg("異常");
}
return result;
}
/**
* 返回對象列表
*/
@PostMapping("/testList")
public ResponseDTO<list>> testList(){
ResponseDTO<list>> result = ResponseDTO.success();
try {
//業務代碼
List<string> data = studyService.testList();
result.setData(data);
} catch (Exception e) {
log.error("處理異常", e);
result.setResult(false);
result.setCode("500");
result.setMsg("異常");
}
return result;
}
}
/<string>/<list>/<list>/<string>/<string>/<void>/<void>
service層源碼:
package com.study.service;
import java.util.List;
import org.springframework.stereotype.Service;
@Service
public class StudyService {
public void testVoid(){
}
public String testString(){
return null;
}
public List<string> testList(){
return null;
}
}
/<string>
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