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ConnectionPool.java
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43 lines (34 loc) · 1.01 KB
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package javaDesignpattern.Flyweight;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Vector;
public class ConnectionPool {
public Vector<Connection> connections;
public String user="root";
public String password="cpproot";
public String url="jdbc:mysql://localhost:3306/test";
public String driver="com.mysql.jdbc.Driver";
//初始化线程池大小
public int connSize=10;
java.sql.Connection connection=null;
//初始化线程池
public ConnectionPool() throws ClassNotFoundException, SQLException{
connections=new Vector<Connection>(connSize);
for(int i=0;i<connSize;i++){
Class.forName(driver);
connection=DriverManager.getConnection(user,password,url);
connections.add(connection);
}
}
//从线程池中取出线程
public synchronized Connection getConnection(){
if(connections.size()>0){
Connection connection=connections.get(0);
connections.remove(connection);
return connection;
}else{
return null;
}
}
}