返回对象Result

@Data
public class Result<T> implements Serializable {
    private int code;
    private String msg;
    private T data;

    private Result(int code, String msg, T data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }

    /**
     * 成功返回
     * @param data
     * @param <T>
     * @return
     */
    public static <T> Result<T> success(T data){
        return  new Result<T>(0,"success",data);
    }
    /**
     * 成功返回
     * @param <T>
     * @return
     */
    public static <T> Result<T> success(){
        return success(null);
    }

    /**
     * 失败返回
     * @param cm
     * @param <T>
     * @return
     */
    public static <T> Result<T> error(CodeMsg cm){
        return  new Result<T>(cm.getCode(),cm.getMsg(),null);
    }
    /**
     * 失败返回
     * @param msg
     * @param <T>
     * @return
     */
    public static <T> Result<T> validationError(String msg){
        CodeMsg validationError = CodeMsg.VALIDATION_ERROR;
        String format = String.format(validationError.getMsg(), msg);
        return  new Result<T>(validationError.getCode(),format,null);
    }
    /**
     * 失败返回
     * @param msg
     * @param <T>
     * @return
     */
    public static <T> Result<T> commError(String msg){
        CodeMsg validationError = CodeMsg.COMM_ERROR;
        String format = String.format(validationError.getMsg(), msg);
        return  new Result<T>(validationError.getCode(),format,null);
    }
}

错误提示封装

@Data
public class CodeMsg {
    private int code;
    private String msg;

    /**
     * 私有构造器
     * @param code
     * @param msg
     */
    private CodeMsg(int code, String msg) {
        this.code = code;
        this.msg = msg;
    }
    /**
     * 通用错误返回
     */
    public static final CodeMsg SERVER_ERROR = new CodeMsg(60000,"服务器异常！");
    public static final CodeMsg VALIDATION_ERROR = new CodeMsg(60001,"参数效验错误：%s！");
    public static final CodeMsg BIZ_ERROR = new CodeMsg(60002,"业务异常：%s！");
}

使用

• 正常返回

   @GetMapping("/applyNo")
    public Result applyNo(@RequestParam("applyType") Integer applyType) {
        String no = orgApplyService.createNo(applyType);
        return Result.success(MapUtil.builder("applyNo", no).map());
    }

  @PostMapping("save")
    public Result save(String applyNo,String commitment) {
        service.save(applyNo, commitment);
        return Result.success();
    }

• 错误提示返回

  @PostMapping("save")
    public Result save(Param param) {
        if(param== null || StringUtils.isBlank(param.getName())){
            // 仅仅是举例说明返回哈
            return Result.error(CodeMsg.SERVER_ERROR);
        }
        servicesave(param);
        return Result.success();
    }