yb课堂之自定义异常和配置 《五》

开发自定义异常和配置

• 自定义异常 继承RuntimeException
• 开发异常处理器ExceptionHandle

YBException.java

package net.ybclass.online_ybclass.exception;

/**
 * 自定义异常类
 */
public class YBException extends RuntimeException {
    private Integer code;
    private String msg;

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

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

CustomExceptionHandle.java

package net.ybclass.online_ybclass.exception;

import net.ybclass.online_ybclass.utils.JsonData;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * 异常处理类
 */
@ControllerAdvice
public class CustomExceptionHandle {
    private final static Logger logger = LoggerFactory.getLogger(CustomExceptionHandle.class);
    //监听这个异常
    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public JsonData handle(Exception ex){
        logger.error("[ 系统异常 ]{}",ex);
        if (ex instanceof YBException){
            YBException ybException=(YBException)ex;
            return JsonData.buildError(ybException.getCode(),ybException.getMsg());
        }else {
            return JsonData.buildError("全局异常，未知从错误");
        }
    }
}

JsonData.java

package net.ybclass.online_ybclass.utils;

public class JsonData {
    /**
     * 状态码，0表示成功过，1表示处理中，-1表示失败
     */
    private Integer code;
    /**
     * 业务数据
     */
    private Object data;
    /**
     * 信息描述
     */
    private String msg;

    public JsonData() {
    }

    public JsonData(Integer code, Object data, String msg) {
        this.code = code;
        this.data = data;
        this.msg = msg;
    }

    /**
     * 成功，不用返回数据
     * @return
     */
    public static JsonData buildSuccess() {
        return new JsonData(0, null, null);
    }

    /**
     * 成功，返回数据
     * @param data 返回数据
     * @return
     */
    public static JsonData buildSuccess(Object data) {
        return new JsonData(0, data, null);
    }

    /**
     * 失败，返回信息
     * @param msg 返回信息
     * @return
     */
    public static JsonData buildError(String msg) {
        return new JsonData(-1, null, msg);
    }

    /**
     * 失败，返回信息和状态码
     * @param code 状态码
     * @param msg 返回信息
     * @return
     */
    public static JsonData buildError(Integer code, String msg) {
        return new JsonData(code, null, msg);
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}