package com.itxdl.ums.util;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import org.apache.commons.dbcp.BasicDataSource;

//連線池版本
public class DBUtil2 {
private static BasicDataSource dataSource;
static{
dataSource = new BasicDataSource();
initParameter();
}

public static void initParameter(){
    //讀取屬性檔案
    Properties prop = new Properties();
    try {
        prop.load(DBUtil2.class.getClassLoader().getResourceAsStream("db.properties"));
        dataSource.setUsername(prop.getProperty("jdbc.user"));
        dataSource.setUrl(prop.getProperty("jdbc.url"));
        dataSource.setPassword(prop.getProperty("jdbc.password"));
        dataSource.setDriverClassName(prop.getProperty("jdbc.driverClass"));
        dataSource.setInitialSize(Integer.parseInt(prop.getProperty("jdbc.initSize")));
    } catch (IOException e) {
        e.printStackTrace();
    }
}

public static Connection getConnection() throws SQLException{
    return dataSource.getConnection();
}

public static void close(Connection conn){
    if(conn!=null){
        try {
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

public static void main(String[] args) throws SQLException {
    System.out.println(getConnection());
}
 

}

properites配置檔案

jdbc.url=jdbc:oracle:thin:@localhost:1521/xe
jdbc.user=system
jdbc.password=123456
jdbc.driverClass=oracle.jdbc.driver.OracleDriver
jdbc.initSize=20