JDBC的ResultSet使用说明

package com.jun.jdbc.resultset;
 
import java.io.FileInputStream;
import java.sql.*;
import java.util.Properties;
 
/**
 * select语句返回ResultSet，取出结果
 */
public class ResultSet01 {
    public static void main(String[] args) throws Exception {
        //通过Properties对象获取配置文件信息
        Properties properties = new Properties();
        properties.load(new FileInputStream("src\\mysql.properties"));
        //获取到相关值
        String user = properties.getProperty("user");
        String password = properties.getProperty("password");
        String driver = properties.getProperty("driver");
        String url = properties.getProperty("url");
        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, user, password);
        //得到Statement
        Statement statement = connection.createStatement();
        //sql语句
        String sql ="select id,name,sex,borndate from actor";
        //执行sql语句，该语句返回单个，ResultSet对象
        /*
        +----+------+-----+---------------------+
        | id | name | sex | borndate            |
       +----+------+-----+---------------------+
       |  1 | tom  | 男  | 1945-05-06 00:00:00 |
       |  2 | jack | 男  | 1986-06-07 00:00:00 |
       +----+------+-----+---------------------+
         */
        ResultSet resultSet = statement.executeQuery(sql);
        //使用while取出数据
        while (resultSet.next()){//让光标向后移动，没有更多就返回false
            int id = resultSet.getInt(1);//得到第一行
            String name = resultSet.getString(2);//得到第二行
            String sex = resultSet.getString(3);
            Date date = resultSet.getDate(4);
            System.out.println(id+"\t"+name+"\t"+sex+"\t"+date);
        }
        //关闭连接
        resultSet.close();
        statement.close();
        connection.close();
    }
}