自用自定义RuntimeException异常类

//自定义异常类
public class MyException extends RuntimeException {
    //异常信息
    private String errMessage;

    public MyException() {
        super();
    }
    //有参构造，参数赋值
    public MyException(String message) {
        super(message);
        this.errMessage = message;
    }
    //获取异常信息
    public String getErrMessage(){
        return errMessage;
    }
    //抛异常
    public static void cast(String errMessage){
        throw new MyException(errMessage);
    }
    
    //自定义一个CommonError类封装了异常信息
    public static void cast(CommonError commonError){
        throw new MyException(commonError.getErrMessage());
    }

//CommonError 异常信息工具类
public enum CommonError {

	UNKOWN_ERROR("执行过程异常，请重试。"),
	PARAMS_ERROR("非法参数"),
	OBJECT_NULL("对象为空"),
	QUERY_NULL("查询结果为空"),
	REQUEST_NULL("请求参数为空");

	private String errMessage;

	public String getErrMessage() {
		return errMessage;
	}

	private CommonError( String errMessage) {
		this.errMessage = errMessage;
	}

}