【SpringBoot】处理全局异常(附源码)

源码

• https://github.com/HelloSummer5/exception-demo.git

自定义一个业务异常

@Data
public class DemoException extends RuntimeException{

    private static final long serialVersionUID = 1L;

    /** 错误码 **/
    private Integer code;  

    public DemoException() {}

    public DemoException(ResultEnum resultEnum){
        super(resultEnum.getMsg());
        this.code = resultEnum.getCode();
    }
}

错误码枚举

public enum ResultEnum {

    UNKONW_ERROR(-1,"未知错误"),
    SUCCESS(0,"成功"),

    ERROR(10001,"自定义业务异常信息"),
    ;

    private Integer code;
    private String msg;

    ResultEnum(Integer code,String msg) {
        this.code = code;
        this.msg = msg;
    }

    public Integer getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }

    public static String getMsg(int code) {
        for (ResultEnum ele : values()) {
            if(ele.getCode().equals(code)) return ele.getMsg();
        }
        return null;
    }
}

统一返回格式的Result

@Data
public class Result {

    private int code;

    private int count = 0;

    private String msg;

    private Object data;

}

全局异常处理器

@Slf4j
@ControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(value = DemoException.class)
    public ResponseEntity<?> handlerException(HttpServletRequest request, CustomerException e) {
        Result error = new Result();
        // 业务异常
        if(e instanceof DemoException) {
            log.info(this.getClass() + "业务异常：{}", e.getMessage());
            error.setCode(e.getCode());
            error.setMsg(e.getMessage());
//            error.setData(new JsonObject());
            return new ResponseEntity<>(error, HttpStatus.OK);
        }
        // 未知错误
        error.setCode(ResultEnum.UNKONW_ERROR.getCode());
        error.setMsg(ResultEnum.UNKONW_ERROR.getMsg());
        return new ResponseEntity<>(error, HttpStatus.OK);
    }
}

测试一下

@RestController
@RequestMapping("test")
public class TestContrller {
    @GetMapping("/testError")
    public Result testError() throws DemoException {
        throw new DemoException(ResultEnum.ERROR);
    }
}

• 测试结果