封装状态码实体数据给前端

/**
 * 接口统一返回包装类
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Result {
    private String code;
    private String msg;
    private Object data;
    public static Result success() {
        return new Result(Constants.CODE_200, "", null);
    }
    public static Result success(Object data) {
        return new Result(Constants.CODE_200, "", data);
    }
    public static Result error(String code, String msg) {
        return new Result(code, msg, null);
    }
    public static Result error() {
        return new Result(Constants.CODE_500, "系统错误", null);
    }
}

public interface Constants {
    String CODE_200 = "200"; //成功
    String CODE_401 = "401";  // 权限不足
    String CODE_400 = "400";  // 参数错误
    String CODE_500 = "500"; // 系统错误
    String CODE_600 = "600"; // 其他业务异常
    String DICT_TYPE_ICON = "icon";
}

control层使用案例

 @GetMapping("/example")
    public Result get() {
        Map<String, Object> map = new HashMap<>();
        map.put("x", CollUtil.newArrayList("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"));
        map.put("y", CollUtil.newArrayList(150, 230, 224, 218, 135, 147, 260));
        return Result.success(map);
    }