用java代码实现,简易连接池

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

public class ConnectionPool {
  private static final String DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";          //驱动类
  private static final String URL = "jdbc:sqlserver://192.168.0.200:1433;databaseName=MIFUWEBDB";   //数据库url
  private static final String USER = "sa";                                     
  private static final String PASSWORD = "123456";

  private static final int MAXPOOL = 100; //最大连接数
  private static final int MINPOOL = 10; //最小连接数
  private static List pool = new LinkedList(); //连接池对象

  public ConnectionPool(){
    init();
  }

  private void init(){                                           //初始化
    try {
      Class.forName(DRIVER);
      for(int i=0; i<MINPOOL; i++){
        Connection con = DriverManager.getConnection(URL, USER, PASSWORD);
        pool.add(con);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public synchronized Connection getCon(){                               //获取连接
    while(pool.isEmpty()){
      try {
        this.wait();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    Connection con = (Connection) pool.remove(0);
    return con;
  }

  public synchronized void returnCon(Connection con){                          //释放连接
    if(con!=null){
      pool.add(con);
    }
    this.notifyAll();
  }

}

posted @ 2018-03-28 09:37  流去  阅读(1903)  评论(0编辑  收藏  举报