JDBC學習筆記（6）之數據庫連接池實現

package DatabaseConnectionPool;

import java.beans.PropertyVetoException;
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

import com.mchange.v2.c3p0.ComboPooledDataSource;

public class DatabaseConnectionPool {
	private static Properties pro=new Properties();
	private static ComboPooledDataSource databasesource=new ComboPooledDataSource();
/*************初始化數據庫連接池*************/
	private static void initPool()
	{
			try {
				pro.load(new FileInputStream("jdbc.properties"));
				databasesource.setDriverClass(pro.getProperty("jdbc.driver"));
				databasesource.setJdbcUrl(pro.getProperty("jdbc.url"));
				databasesource.setUser(pro.getProperty("jdbc.usrName"));
				databasesource.setPassword(pro.getProperty("jdbc.passwd"));
				databasesource.setInitialPoolSize(15);
				databasesource.setMinPoolSize(5);
				databasesource.setMaxPoolSize(30);
				databasesource.setMaxIdleTime(60);
				databasesource.setIdleConnectionTestPeriod(60);
			} catch (PropertyVetoException | IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
	}
/*************建立連接、創建Statement*************/
	public static Statement getConnction()
	{
		initPool();
		Connection conn=null;
		Statement st=null;
		try {
			 conn=databasesource.getConnection();
			 st=conn.createStatement();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return st;
		
	}

}