读取properties实现数据库连接

读取类
public class ReadProperties {
	
	//读取配置文件
	public String readProperties(String filename,String propertiesname) throws IOException{
		InputStream in=this.getClass().getClassLoader().getResourceAsStream(filename);
		Properties prop=new Properties();
		try{
		prop.load(in);
		}catch (IOException e) {
			   e.printStackTrace();
		  }
		return prop.getProperty(propertiesname);
	}

}

properties文件
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=test
jdbc.password=123456

数据库连接代码

public Connection getConnection()throws Exception{
		
		ReadProperties rp=new ReadProperties();
		String filename="database.properties";
		String driver=rp.readProperties(filename, "jdbc.driverClassName");
		String url=rp.readProperties(filename, "jdbc.url");
		String username=rp.readProperties(filename,"jdbc.username");
		String password=rp.readProperties(filename,"jdbc.password");
		
		
		
		
		Connection conn=null;
		//加载驱动
		System.out.println(driver);
		Class.forName(driver);
		
		conn=DriverManager.getConnection(url,username,password);
		//
		return conn;
		
	}


你可能感兴趣的:(mysql,oracle)