Java如何知道光标的当前位置？
在结果集中移动时，您可能想知道当前光标位于哪一行。要获取此信息，可以调用ResultSet的getRow()方法。
package org.nhooo.example.jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ScrollableGetRowExample {
private static final String URL = "jdbc:mysql://localhost/nhooo";
private static final String USERNAME = "root";
private static final String PASSWORD = "";
public static void main(String[] args) {
try (Connection connection =
DriverManager.getConnection(URL, USERNAME, PASSWORD)) {
Statement statement = connection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
String sql = "SELECT code, name, price FROM products";
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()) {
String code = resultSet.getString("code");
//通过调用结果集的getRow()方法，我们
//知道结果集中的当前行是什么
//我们正在从中读取数据。
int row = resultSet.getRow();
System.out.println(row + ". " + code);
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}上面的代码片段的结果：
1. P0000001 2. P0000002 3. P0000003 4. P0000004 5. P0000005
Maven依赖
<!-- https://search.maven.org/remotecontent?filepath=mysql/mysql-connector-java/8.0.17/mysql-connector-java-8.0.17.jar -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.17</version>
</dependency>