[](()3. 添加Knife4j配置类
@EnableKnife4j
@Configuration
public class Knife4jConfig {
@Bean
public Docket createRestApi() {
return new Docket(DocumentationType.OAS_30)
.apiInfo(apiInfo())
.select()
.apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title(“Knife4j-API接口文档”)
.description(“API接口文档”)
.contact(new Contact(“JourWon”, “https://thinkwon.blog.csdn.net/”, “JourWon@163.com”))
.version(“1.0.0”)
.build();
}
}
[](()4. 添加枚举与实体类
[](()4.1 响应编码枚举
@Getter
@AllArgsConstructor
public enum CommonResponseCodeEnum {
SUCCESS(“00000”, “成功”),
REQUEST_PARAMETER_ILLEGAL(“A0400”, “用户请求参数错误”),
UNAUTHORIZED_ACCESS(“A0301”, “访问未授权”),
NONSUPPORT_REQUEST_TYPE(“A0444”, “不支持当前请求类型”),
USER_ID_NOT_EXIST(“A0445”, “用户id不存在”),
DATABSE_FIELD_DUPLICATE(“A0446”, “数据库字段重复”),
SYSTEM_EXCEPTION(“B0001”, “系统执行出错”),
SYSTEM_EXECUTION_TIMEOUT(“B0100”, “系统执行超时”),
;
private final String code;
private final String message;
}
[](()4.2 上传文件信息@Data
@NoArgsConstructor
@AllArgsConstructor
public class UploadFile {
private String fileName;
private String url;
}
[](()4.3 统一返回前端的响应对象@Data
@NoArgsConstructor
@AllArgsConstructor
@ApiModel(value = “CommonResponse-统一返回前端的响应对象”)
public class CommonResponse implements Serializable {
private static final long serialVersionUID = -1338376281028943181L;
public static final String MDC_KEY = “traceId”;
@ApiModelProperty(value = “响应编码”)
private String code;
@ApiModelProperty(value = “响应信息”)
private String message;
@ApiModelProperty(value = “业务数据”)
private T data;
@ApiModelProperty(value = “traceId”)
private String traceId = MDC.get(MDC_KEY);
@ApiModelProperty(value = “响应日期时间”)
@JsonFormat(timezone = “GMT+8”, pattern = “yyyy-MM-dd HH:mm:ss.SSS”)
private LocalDateTime localDateTime = LocalDateTime.now();
public CommonResponse(String code, String message) {
this.code = code;
this.message = message;
}
public CommonResponse(CommonResponseCodeEnum commonResponseCodeEnum) {
this.code = commonResponseCodeEnum.getCode();
this.message = commonResponseCodeEnum.getMessage();
}
public CommonResponse(T data) {
this.code = CommonResponseCodeEnum.SUCCESS.getCode();
this.message = CommonResponseCodeEnum.SUCCESS.getMessage();
this.data = data;
}
public CommonResponse(CommonResponseCodeEnum commonResponseCodeEnum, T data) {
this.code = commonResponseCodeEnum.getCode();
this.message = commonResponseCodeEnum.getMessage();
this.data = data;
}
public static CommonResponse success() {
return new CommonResponse<>(CommonResponseCodeEnum.SUCCESS);
}
public static CommonResponse success(String message) {
return new CommonResponse<>(CommonResponseCodeEnum.SUCCESS.getCode(), message);
}
public static CommonResponse success(T data) {
return new CommonResponse<>(CommonResponseCodeEnum.SUCCESS, data);
}
public static CommonResponse success(CommonRespon 《一线大厂Java面试题解析+后端开发学习笔记+最新架构讲解视频+实战项目源码讲义》无偿开源 威信搜索公众号【编程进阶路】 seCodeEnum commonResponseCodeEnum, T data) {
return new CommonResponse<>(commonResponseCodeEnum, data);
}
public static CommonResponse failure(CommonResponseCodeEnum commonResponseCodeEnum) {
return new CommonResponse<>(commonResponseCodeEnum);
}
public static CommonResponse failure(CommonResponseCodeEnum commonResponseCodeEnum, T data) {
return new CommonResponse<>(commonResponseCodeEnum, data);
}
}
[](()5. 文件上传接口与实现类
[](()5.1 文件上传接口
public interface FileStorageService {
void init();
void save(MultipartFile multipartFile);
Resource load(String filename);
Stream
void clear();
}
[](()5.2 文件上传接口实现类@Service
public class FileStorageServiceImpl implements FileStorageService {
private final Path path = Paths.get(“fileStorage”);
@Override
public void init() {
try {
if (!Files.exists(path)) {
Files.createDirectory(path);
}
} catch (IOException e) {
throw new RuntimeException(“Could not initialize folder for upload!”);
}
}
@Override
public void save(MultipartFile multipartFile) {
try {
Files.copy(multipartFile.getInputStream(), this.path.resolve(multipartFile.getOriginalFilename()));
} catch (IOException e) {
throw new RuntimeException(“Could not store the file. Error:” + e.getMessage());
}
}
@Override
public Resource load(String filename) {
Path file = path.resolve(filename);
try {
Resource resource = new UrlResource(file.toUri());
if (resource.exists() || resource.isReadable()) {
return resource;
} else {
throw new RuntimeException(“Could not read the file.”);
}
} catch (MalformedURLException e) {
