package com.abc.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class BaseDao {  public Connection getConn()  {   Connection conn=null;   try {    Class.forName("com.mysql.jdbc.Driver");   } catch (ClassNotFoundException e) {    // TODO Auto-generated catch block    e.printStackTrace();   }   String url="jdbc:mysql://127.0.0.1:3306/user";   try {    conn=DriverManager.getConnection(url, "root", "");   } catch (SQLException e) {    // TODO Auto-generated catch block    e.printStackTrace();   }    return conn;  }  public void closeAll(ResultSet rs,Statement stat,Connection conn)  {   if(rs!=null)    try {     rs.close();    } catch (SQLException e) {     // TODO Auto-generated catch block     e.printStackTrace();    }   if(stat!=null)    try {     stat.close();    } catch (SQLException e) {     // TODO Auto-generated catch block     e.printStackTrace();    }   if(conn!=null)    try {     conn.close();    } catch (SQLException e) {     // TODO Auto-generated catch block     e.printStackTrace();    }  } }