JdbcUtil类的编写

package dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class JdbcUtil {

public static final String url = "jdbc:mysql://localhost:3306/mydatabase";  
    public static final String name = "com.mysql.jdbc.Driver";  
    public static final String user = "root";  
    public static final String password = "12344";  
 
    public Connection conn = null;  
    public PreparedStatement pst = null;  
 
 
    public  JdbcUtil(String sql) {  
        try {  
            Class.forName(name);//注册驱动
            conn = DriverManager.getConnection(url, user, password);//获取连接  
            pst = conn.prepareStatement(sql);//准备执行语句  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
 
    public void close() {  
        try {  
            this.conn.close();  
            this.pst.close();  
        } catch (SQLException e) {  
            e.printStackTrace();  
        }  
    }  
    
}