+------+-------+------+------+------+
| Sno  | Sname | Ssex | Sage | Dno  |
+------+-------+------+------+------+
| Sno1 | Smith | m    |   21 | D01  |
| Sno2 | Marry | f    |   21 | D01  |
| Sno3 | Tom   | m    |   21 | D01  |
+------+-------+------+------+------+
 

執行程式之後，它是這樣的

+-----+-------+------+------+------+
| Sno | Sname | Ssex | Sage | Dno  |
+-----+-------+------+------+------+
| S1  | Smith | m    |   21 | D01  |
| S2  | Marry | f    |   21 | D01  |
| S3  | Tom   | m    |   21 | D01  |
+-----+-------+------+------+------+

import java.io.FileInputStream;
import java.sql.*;
import java.util.Properties;

public class ResultSetTest {
//    常規操作，不解釋
    private String driver;
    private String url;
    private String user;
    private String pass;

    public void initParam(String paramFile) throws  Exception{
        Properties properties = new Properties();
        properties.load(new FileInputStream(paramFile));
        driver = properties.getProperty("driver");
        url =  properties.getProperty("url");
        user =  properties.getProperty("user");
        pass = properties.getProperty("pass");
    }

    public void query(String sql)throws Exception{
        Class.forName(driver);
        try(
                Connection connection = DriverManager.getConnection(url, user, pass);
                
                PreparedStatement preparedStatement = connection.prepareStatement(
                        sql,
                        ResultSet.TYPE_SCROLL_INSENSITIVE,
                        ResultSet.CONCUR_UPDATABLE);
//                當需要結果集可更新表的內容的時候，就需要在這裡傳入相應的引數
//                 ResultSet.TYPE_SCROLL_INSENSITIVE：指標可以自由移動 
//                 ResultSet.CONCUR_UPDATABLE：可以更新表的內容
                
                
                ResultSet rs = preparedStatement.executeQuery())
        {
            
            rs.last();
//            將指標移動到最後一行
            
            int rowCount = rs.getRow();
//            得到行數
            
            for(int i=rowCount; i>0; i--){
//                將指標在最後一行往前挪
                
                rs.absolute(i);
//                將指標在最後一行往前挪
                
                
                System.out.println(rs.getString(1) + "\t" +
                                    rs.getString(2) + "\t" +
                                      rs.getString(3) + "\t" +
                                       rs.getInt(4) + "\t" +
                                        rs.getString(5));
//                打印出對應列的資訊
                
                rs.updateString(1, "S" + i);
//                更新第幾列
                
                rs.updateRow();
//                執行更新
            }
        }
    }

    public static void main(String args[]) throws  Exception{
        ResultSetTest rt = new ResultSetTest();
        rt.initParam("mysql.ini");
        rt.query("select * from students;");
    }
}
//執行程式，看到以下輸出
//  S3	    Tom	m	21	D01
//  S2	    Marry	f	21	D01
//  S1	    Smith	m	21	D01