daoexception.java

来自「基于WEB的学生选课系统」· Java 代码 · 共 29 行

package com.student.dao;
import java.io.PrintStream;
public class DAOException extends Exception
{

    public DAOException()
    {
        System.err.println("数据库访问失败！");
    }

    public DAOException(String message)
    {
        super(message);
        System.err.println("数据库访问失败！");
    }

    public DAOException(String message, Throwable cause)
    {
        super(message, cause);
        System.err.println("数据库访问失败！");
    }

    public DAOException(Throwable cause)
    {
        super(cause);
        System.err.println("数据库访问失败！");
    }
}