springboot异常处理

public class JsonResult {
    private T data;
    private String code;
    private String msg;

    
    public JsonResult() {
        this.code = "0";
        this.msg = "操作成功！";
    }

    
    public JsonResult(String code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    
    public JsonResult(T data) {
        this.data = data;
        this.code = "0";
        this.msg = "操作成功！";
    }

    
    public JsonResult(T data, String msg) {
        this.data = data;
        this.code = "0";
        this.msg = msg;
    }
    // 省略get和set方法
}

处理异常（以空指针异常为例）

@ControllerAdvice
@ResponseBody
public class GlobalExceptionHandler {
    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    
    @ExceptionHandler(NullPointerException.class)
    @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
    public JsonResult handleTypeMismatchException(NullPointerException ex) {
        logger.error("空指针异常，{}", ex.getMessage());
        return new JsonResult("500", "空指针异常了");
    }
}

//拦截自定义异常
1.定义异常信息

public enum BusinessMsgEnum {
    
    PARMETER_EXCEPTION("102", "参数异常!"),
    
    SERVICE_TIME_OUT("103", "服务调用超时！"),
    
    PARMETER_BIG_EXCEPTION("102", "输入的图片数量不能超过50张!"),
    
    UNEXPECTED_EXCEPTION("500", "系统发生异常，请联系管理员！");
    // 还可以定义更多的业务异常

    
    private String code;
    
    private String msg;

    private BusinessMsgEnum(String code, String msg) {
        this.code = code;
        this.msg = msg;
    }
	// set get方法
}

拦截自定义异常

public class BusinessErrorException extends RuntimeException {
    
    private static final long serialVersionUID = -7480022450501760611L;

    
    private String code;
    
    private String message;

    public BusinessErrorException(BusinessMsgEnum businessMsgEnum) {
        this.code = businessMsgEnum.code();
        this.message = businessMsgEnum.msg();
    }
	// get set方法
}

处理异常

@ControllerAdvice
@ResponseBody
public class GlobalExceptionHandler {

    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);
    
    @ExceptionHandler(BusinessErrorException.class)
    @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
    public JsonResult handleBusinessError(BusinessErrorException ex) {
        String code = ex.getCode();
        String message = ex.getMessage();
        return new JsonResult(code, message);
    }
}

原文链接: link.