使用JDK动态代理方式实现自己的数据源

package com.lwh.datasource;

import java.sql.Connection;
import java.sql.SQLException;

import javax.sql.DataSource;

import com.mysql.jdbc.PreparedStatement;

public class MyDataSourceClient {

private static DataSource ds = new MyDataSource1();

public static void main(String[] args) {
Connection conn = null;
PreparedStatement pst = null;
try{
conn = ds.getConnection();
System.out.println(conn);
}catch(Exception e){
e.printStackTrace();
}finally{
if(pst != null){
try {
pst.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(conn != null){
try {
conn.close();//该方法应做到，不要关闭连接，而应该还回池中
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}