spring boot中全局异常的定义

全局异常

import com.alibaba.fastjson.JSON;
import com.ziku.msp.common_enum.ErrorCodeEnum;
import com.ziku.msp.exception.BizException;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.springframework.core.Ordered;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.stereotype.Component;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.NoHandlerFoundException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;
@Slf4j
@Component
public class GlobalExceptionHandler implements HandlerExceptionResolver, Ordered {
    private int order = Ordered.HIGHEST_PRECEDENCE;
    @Override
    public int getOrder() {
        return 0;
    }

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object o, Exception ex) {
        Map map = new HashMap();

        if (ex instanceof BizException) {
            log.info("GlobalExceptionHandler>>>>>异常信息：{}", ExceptionUtils.getStackTrace(ex));

            BizException runtimeException = (BizException) ex;

            map.put("errorCode", runtimeException.getErrorCode());
            map.put("errorMsg", runtimeException.getErrorMsg());

        }else if (ex instanceof HttpRequestMethodNotSupportedException) {
            log.error("-------controller exception-------", ex);

            map.put("errorCode", ErrorCodeEnum.REQUEST_METHOD_ERROR.getErrorCode());
            map.put("errorMsg", ErrorCodeEnum.REQUEST_METHOD_ERROR.getErrorMsg());

        }else if (ex instanceof NoHandlerFoundException) {
            log.error("-------controller exception-------", ex);
            map.put("errorCode", ErrorCodeEnum.REQUESTED_URL_DOESNT_EXIST.getErrorCode());
            map.put("errorMsg", ErrorCodeEnum.REQUESTED_URL_DOESNT_EXIST.getErrorMsg());

        } else if (ex instanceof ServletRequestBindingException) {
            log.error("-------controller exception-------", ex);

            map.put("errorCode", ErrorCodeEnum.REQUEST_PARAMETER_IS_INCORRECT.getErrorCode());
            map.put("errorMsg", ErrorCodeEnum.REQUEST_PARAMETER_IS_INCORRECT.getErrorMsg());

        } else if (ex instanceof HttpMessageNotReadableException) {
            log.error("-------controller exception-------", ex);

            map.put("errorCode", ErrorCodeEnum.REQUEST_PARAMETER_IS_INCORRECT.getErrorCode());
            map.put("errorMsg", ErrorCodeEnum.REQUEST_PARAMETER_IS_INCORRECT.getErrorMsg());

        }else if (ex instanceof ConstraintViolationException) {
            log.error("-------controller exception-------", ex);

            final String msg = ((ConstraintViolationException) ex).getConstraintViolations().stream()
                    .map(ConstraintViolation::getMessage)
                    .collect(Collectors.joining(","));
            map.put("errorCode", "400");
            map.put("errorMsg", msg);

        }
        else {
            log.error("-------controller exception-------", ex);

            map.put("errorCode", ErrorCodeEnum.INTERNAL_SERVER_ERROR.getErrorCode());
            map.put("errorMsg", ErrorCodeEnum.INTERNAL_SERVER_ERROR.getErrorMsg());
        }
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json;charset=utf-8");
        String method = request.getMethod();
        String origin = request.getHeader("Origin");
        response.setHeader("Access-Control-Allow-Origin", origin);
        response.setHeader("Access-Control-Allow-Credentials", "true");
        //response.setHeader("Access-Control-Allow-Origin", "*");//解决跨域问题
        response.setHeader("Access-Control-Allow-Headers", "*"); // 特殊的header需要定义,Content-Type等常用请求头不需要设置加入
        response.setHeader("Access-Control-Allow-Methods","*");
        response.setStatus(200);
        try {
            response.getWriter().print(JSON.toJSONString(map));
        } catch (IOException e) {

            e.printStackTrace();
        }


        return new ModelAndView();
    }
}

运行时异常的统一封装

public class BizException extends RuntimeException {
    /**
     *
     */
    private static final long serialVersionUID = -5110371239340231002L;

    private String errorCode;

    private String errorMsg;

    public BizException(Throwable cause) {
        super(cause);
    }

    public BizException(String message) {
        super(message);
    }

    public BizException(String message, Throwable cause) {
        super(message, cause);
    }

    public BizException(Exception exception) {
        super(exception);
    }

    public BizException(ErrorCodeEnum errorCode, Throwable cause) {
        super(cause);
        this.errorCode = errorCode.getErrorCode();
        this.errorMsg = errorCode.getErrorMsg();
    }

    public BizException(String errorCode, String errorMsg) {
        super();
        this.errorCode = errorCode;
        this.errorMsg = errorMsg;
    }

    public BizException(ErrorCodeEnum errorCode) {
        super();
        this.errorCode = errorCode.getErrorCode();
        this.errorMsg = errorCode.getErrorMsg();
    }

    public String getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(String errorCode) {
        this.errorCode = errorCode;
    }

    public String getErrorMsg() {
        return errorMsg;
    }

    public void setErrorMsg(String errorMsg) {
        this.errorMsg = errorMsg;
    }
}

定义异常枚举

public enum ErrorCodeEnum {
    REQUEST_METHOD_ERROR("-3", "接口请求方法类型错误"),

    REQUEST_PARAMETER_IS_INCORRECT("-2", "请求参数有误"),

    INTERNAL_SERVER_ERROR("-1", "服务繁忙"),

    REQUESTED_URL_DOESNT_EXIST("-4", "请求的资源不存在"),

    OPERATION_FREQUENTLY("-5", "请求频繁，请勿重复请求"),

    REQUEST_COUNT_LIMIT("10000", "访问次数超出限制"),

    SUCCESS("0", "请求成功"),

    MISSING_SYSTEM_PARAMETERS("6", "缺少系统参数"),

    APP_KEY_NOT_EXIST("7", "app_key不存在或合作方不合作"),

    API_VERSION_NOT_SUPPORT("8", "api版本号不支持"),

    PARAM_SIGN_FAILED("9", "参数验证失败")；




    private ErrorCodeEnum(String errorCode, String errorMsg) {
        this.errorCode = errorCode;
        this.errorMsg = errorMsg;
    }

    private String errorCode;
    private String errorMsg;

    public String getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(String errorCode) {
        this.errorCode = errorCode;
    }

    public String getErrorMsg() {
        return errorMsg;
    }

    public void setErrorMsg(String errorMsg) {
        this.errorMsg = errorMsg;
    }
}