JDBC连接数据库的通用方法

package jdbc;

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

public class JDBCUtil {

    public Connection getConnection(){
        Connection connection = null;
        try {
            Properties properties = new Properties();
            InputStream in = this.getClass().getClassLoader().getResourceAsStream("jdbc.properties");
            properties.load(in);
            
            String user = properties.getProperty("user");
            String password = properties.getProperty("password");
            String jdbcUrl = properties.getProperty("jdbcUrl");
            String driver = properties.getProperty("driver");
            
            //加载驱动
            Class.forName(driver);
            
            //返回连接
            connection =  DriverManager.getConnection(jdbcUrl, user, password);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            if(connection != null){
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
        return connection;
        
    }
    
    public static void main(String[] args) {
        Connection connection = new JDBCUtil().getConnection();
        System.out.println(connection.toString());
    }
}