ResultSet: beforeFirst()
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class Main {
public static Connection getConnection() throws Exception {
String driver = "org.gjt.mm.mysql.Driver";
String url = "jdbc:mysql://localhost/octopus";
String username = "root";
String password = "root";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
conn = getConnection();
String query = "select id, name from employees";
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
rs = stmt.executeQuery(query);
while (rs.next()) {
String id = rs.getString(1);
String name = rs.getString(2);
System.out.println("id=" + id + " name=" + name);
}
rs.first();
rs.deleteRow();
rs.beforeFirst();
while (rs.next()) {
String id = rs.getString(1);
String name = rs.getString(2);
System.out.println("id=" + id + " name=" + name);
}
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
} finally {
try {
rs.close();
stmt.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
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