【Tips】这是一份多年来的异常catch经验

package com.hb.merchant.controller;

import com.hb.merchant.constant.MerchantConstant;
import com.hb.merchant.exception.AccountException;
import com.hb.util.enums.ResponseCode;
import com.hb.util.exception.BusinessException;
import com.hb.util.exception.ParamException;
import com.hb.util.utils.ResponseData;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.validation.BindException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;
import org.springframework.web.multipart.MaxUploadSizeExceededException;

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

/**
 * @author qucheng
 */
@RestControllerAdvice
@Slf4j
public class ErrorController {


    private final static String SPLIT = "  <_>";

    @ExceptionHandler(MissingServletRequestParameterException.class)
    public ResponseData<Object> paramErrorHandler(Exception e, HttpServletRequest request) {
        log.error("url:{} -> Account参数异常:{}", request == null ? null : request.getRequestURL(), e);
        return ResponseData.fail(ResponseCode.PARAM_INVALIDATE.getCode(), e.getMessage());
    }

    @ExceptionHandler(MethodArgumentTypeMismatchException.class)
    public ResponseData<Object> mismatchErrorHandler(MethodArgumentTypeMismatchException e) {
        log.error("参数转换失败，方法：" + Objects.requireNonNull(e.getParameter().getMethod()).getName() + ",参数：" +
                e.getName() + "，信息：" + e.getLocalizedMessage());
        return ResponseData.fail(ResponseCode.PARAM_INVALIDATE.getCode(), e.getMessage());
    }

    @ExceptionHandler(BusinessException.class)
    public ResponseData<Object> handler(BusinessException e, HttpServletRequest request) {
        log.error("url:{} -> 业务异常:{}", request == null ? null : request.getRequestURL(), e);
        return ResponseData.fail(e.getCode() == null ? ResponseCode.INTERNAL_ERROR.getCode() : e.getCode(), e.getMsg());
    }

    @ExceptionHandler(ParamException.class)
    public ResponseData<Object> handler(ParamException e, HttpServletRequest request) {
        log.error("url:{} -> 参数异常:{}", request == null ? null : request.getRequestURL(), e);
        return ResponseData.fail(ResponseCode.PARAM_INVALIDATE.getCode(), e.getMsg());
    }

    /**
     * 配合Assert使用，香
     *
     * @param e       e
     * @param request request
     * @return heiheihei
     */
    @ExceptionHandler({IllegalStateException.class, IllegalArgumentException.class})
    public ResponseData<Object> handler(RuntimeException e, HttpServletRequest request) {
        log.error("url:{} -> 业务异常:{}", request == null ? null : request.getRequestURL(), e);
        return ResponseData.fail(ResponseCode.PARAM_INVALIDATE.getCode(), e.getMessage());
    }

    @ExceptionHandler
    public ResponseData<Object> handler(Exception e, HttpServletRequest request) {
        log.error("url:{} -> 错误:{}", request == null ? null : request.getRequestURL(), e);
        return ResponseData.fail(ResponseCode.INTERNAL_ERROR.getCode(), MerchantConstant.ERROR_MSG_EXCEPTION);
    }

    /**
     * body参数
     *
     * @param e BindException
     */
    @ExceptionHandler(BindException.class)
    public ResponseData<Object> handlerBindException(BindException e) {
        StringBuilder msg = new StringBuilder();
        e.getBindingResult().getFieldErrors().forEach(c ->
                msg.append(c.getDefaultMessage()).append(":").append(c.getRejectedValue()).append(SPLIT));
        return ResponseData.fail(ResponseCode.PARAM_INVALIDATE.getCode(), msg.substring(0, msg.lastIndexOf(SPLIT)));
    }

    /**
     * 方法参数
     *
     * @param e ConstraintViolationException
     */
    @ExceptionHandler(ConstraintViolationException.class)
    public ResponseData<Object> handlerConstraintViolationException(ConstraintViolationException e) {
        StringBuilder msg = new StringBuilder();
        e.getConstraintViolations().forEach(c ->
                msg.append(c.getMessage()).append(":").append(c.getInvalidValue()).append(SPLIT));
        return ResponseData.fail(ResponseCode.PARAM_INVALIDATE.getCode(), msg.substring(0, msg.lastIndexOf(SPLIT)));
    }

}