jdbc.properties文件：

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3366/bjpowernode
user=root
password=123

package 连接数据库的信息配置到配置文件;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ResourceBundle;

public class JDBCTest05 {
    public static void main(String[] args) {
        //使用资源绑定器绑定配置文件
        ResourceBundle bundle = ResourceBundle.getBundle("jdbc");
        String driver = bundle.getString("driver");
        String url = bundle.getString("url");
        String user = bundle.getString("user");
        String password = bundle.getString("password");

        Connection conn = null;
        Statement stmt = null;
        try {
            //注册驱动
            Class.forName(driver);
            //获取连接
            conn = DriverManager.getConnection(url,user,password);
            //获取操作数据库对象
            stmt = conn.createStatement();
            //执行sql
            String sql = "insert into dept(deptno,dname,loc) values(80,'人事部','北京')";
            int count = stmt.executeUpdate(sql);
            System.out.println(count);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            if(stmt!=null){
                try {
                    stmt.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
            if(conn!=null){
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}