分布式系统工具类

package com.box.common.core.exception;

import com.box.common.core.enums.ErrorCodeEnum;
import com.box.common.core.rt.Result;
import com.box.common.core.utils.StringUtils;
import feign.FeignException;
import feign.RetryableException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.validation.BindingResult;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.NoHandlerFoundException;
import org.springframework.web.util.NestedServletException;

import javax.servlet.http.HttpServletRequest;
import javax.validation.ConstraintViolationException;
import java.util.Objects;

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


    @ExceptionHandler(value = OrderException.class)
    public Result orderExceptionHandler(HttpServletRequest req, OrderException e) {
        logger.info("订单异常！", e);
        return Result.fail(e.getCode(), e.getMsg());
    }

    /**
     * 处理自定义的业务异常
     *
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value = AuthException.class)
    public Result authExceptionHandler(HttpServletRequest req, AuthException e) {
        logger.info("用户登陆验证异常！", e);
        return Result.fail(e.getCode(), e.getMsg());
    }


    /**
     * 处理feign ok http 请求错误
     *
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value = RetryableException.class)
    public Result feignServiceExceptionHandler(HttpServletRequest req, RetryableException e) {
        logger.error("Feign 调用接口发生业务异常！", e);
        if(e.getCause() instanceof FeignServiceException){
            FeignServiceException feignServiceException = (FeignServiceException) e.getCause();
            return Result.fail(feignServiceException.getCode(), feignServiceException.getMsg());
        }
        return Result.fail(ErrorCodeEnum.SERVER.getCode(), ErrorCodeEnum.SERVER.getMessage());

    }


    /**
     * 处理自定义的业务异常
     *
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value = ServiceException.class)
    public Result mallServiceExceptionHandler(HttpServletRequest req, ServiceException e) {
        logger.error("服务端发生业务异常！", e);
        return Result.fail(e.getCode(), e.getMessage());
    }


    /**
     * 处理空指针的异常
     *
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value = NullPointerException.class)
    public Result exceptionHandler(HttpServletRequest req, NullPointerException e) {
        logger.error("发生空指针异常！", e);
        return Result.fail(e.getMessage());
    }

    /**
     * 处理其他异常
     *
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value = Exception.class)
    public Result exceptionHandler(HttpServletRequest req, Exception e) {
        logger.error("未知异常！", e);
        return Result.fail(ErrorCodeEnum.FAIL.getMessage());
    }

    /**
     * 参数验证
     *
     * @return
     */
    @ExceptionHandler(ConstraintViolationException.class)
    public Result constraintViolationExceptionHandle(ConstraintViolationException e) {
        //login.password: 请输入密码, login.account: 请输入账号
        String[] arrays = e.getMessage().split(",");
        StringBuffer msg = new StringBuffer();
        for (String array : arrays) {
            msg.append(array.split(":")[1]).append(",");
        }
        logger.info("请求参数验证错误1：{}", e.getMessage());
        return Result.fail(ErrorCodeEnum.CHECK_PARAM.getCode(), msg.deleteCharAt(msg.length()-1).toString());
    }




    /**
     * 参数验证
     *
     * @return
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public Result methodArgumentNotValidExceptionHandle(MethodArgumentNotValidException e) {
        logger.info("请求参数验证错误2：{}", e.getMessage());
        BindingResult bindingResult = e.getBindingResult();
        String msg = Objects.requireNonNull(bindingResult.getFieldError()).getDefaultMessage();
        return Result.fail(ErrorCodeEnum.CHECK_PARAM.getCode(), msg);
    }

    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    public Result httpRequestMethodNotSupportedExceptionHandle(HttpRequestMethodNotSupportedException e) {
        logger.error("请求方式错误", e);
        return Result.fail(ErrorCodeEnum.REQUEST_NOT_METHOD.getCode(),e.getMessage());
    }

    @ExceptionHandler(NoHandlerFoundException.class)
    public Result noHandlerFoundExceptionExceptionHandle(NoHandlerFoundException e) {
        logger.error("请求方式错误", e);
        return Result.fail(ErrorCodeEnum.REQUEST_NOT_METHOD.getCode(),e.getMessage());
    }

    @ExceptionHandler(HttpMessageNotReadableException.class)
    public Result httpMessageNotReadableExceptionHandle(HttpMessageNotReadableException e) {
        logger.error("数据格式转换错误", e);
        return Result.fail(ErrorCodeEnum.PARAM_CONVERSION_ERROR.getCode(),ErrorCodeEnum.PARAM_CONVERSION_ERROR.getMessage());
    }


}