• 定义全局返回result
public class Result {    /**     * 状态响应码     */    private int code;    /**     * 响应结果 成功/失败     */    private boolean success;    /**     * 响应信息     */    private String message;    /**     * 响应数据     */    @JsonInclude(JsonInclude.Include.NON_NULL)    private Object data;    /**     * 数据总数     */    @JsonInclude(JsonInclude.Include.NON_NULL)    private Long totalCount;    public Result setCode(ResultCode resultCode) {        this.code = resultCode.code();        return this;    }    public int getCode() {        return code;    }    public boolean isSuccess() {        return success;    }    public Result setSuccess(boolean success) {        this.success = success;        return this;    }    public String getMessage() {        return message;    }    public Result setMessage(String message) {        this.message = message;        return this;    }    public Object getData() {        return data;    }    public Result setData(Object data) {        this.data = data;        return this;    }    public Long getTotalCount() { return totalCount;}    public Result setTotalCount(Long totalCount) {        this.totalCount = totalCount;        return this;    }}
  • 定义全局resultCode
public enum ResultCode {    SUCCESS(200),//成功    FAIL(400),//失败    UNAUTHORIZED(401),//未认证（签名错误） 未登录    NOT_FOUND(404),//接口不存在    INTERNAL_SERVER_ERROR(500);//服务器内部错误    private final int code;    ResultCode(int code) {        this.code = code;    }    public int code() {        return code;    }}
  • 定义返回工具类
@Slf4jpublic class ReturnUtils {    private static final String DEFAULT_SUCCESS_MESSAGE = "SUCCESS";    public static Result success() {        return new Result().setCode(ResultCode.SUCCESS)                .setSuccess(true)                .setMessage(DEFAULT_SUCCESS_MESSAGE);    }    public static Result success(String msg) {        return new Result().setCode(ResultCode.SUCCESS)                .setSuccess(true)                .setMessage(msg);    }    public static Result success(String msg, Object data, long totalCount) {        return new Result().setCode(ResultCode.SUCCESS)                .setMessage(msg)                .setData(data)                .setSuccess(true)                .setTotalCount(totalCount);    }    public static Result fail(String msg) {        log.error(msg);        return new Result().setCode(ResultCode.FAIL)                .setSuccess(false)                .setMessage(msg);    }    public static Result fail(ResultCode code, String msg) {        log.error(msg);        return new Result().setCode(code)                .setSuccess(false)                .setMessage(msg);    }}
  • 定义全局异常处理类
@Slf4j@RestControllerAdvicepublic class ExceptionAdvice {    @ExceptionHandler(Exception.class)    public Result exceptionHandler(HttpServletResponse resp, Exception e) {        log.error(e.getMessage());        return ReturnUtils.fail(ResultCode.INTERNAL_SERVER_ERROR, e.getMessage());    }}
  • 测试
@RequestMapping("test-exception")    public void testException() {        try {            int i = 1 / 0;        } catch (Exception e) {            throw new RuntimeException("服务器发生错误，请联系管理员");        }    }
  • 结果
{    "code":500,    "success":false,    "message":"服务器发生错误，请联系管理员"}