如何通过java脚本在sql developer中提取表中某列的值

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class ExtractColumnValues {
    public static void main(String[] args) {
        // 设置数据库连接信息
        String url = "jdbc:oracle:thin:@localhost:1521:XE";
        String username = "your_username";
        String password = "your_password";

        // 声明连接、预编译语句和结果集
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;

        try {
            // 加载数据库驱动程序
            Class.forName("oracle.jdbc.driver.OracleDriver");

            // 建立数据库连接
            conn = DriverManager.getConnection(url, username, password);

            // 编写SQL查询语句
            String sql = "SELECT column_name FROM table_name";

            // 预编译SQL语句
            pstmt = conn.prepareStatement(sql);

            // 执行查询操作
            rs = pstmt.executeQuery();

            // 遍历结果集，输出每一行的值
            while (rs.next()) {
                String value = rs.getString("column_name");
                System.out.println(value);
            }

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭结果集、预编译语句和连接
            try {
                if (rs != null) rs.close();
                if (pstmt != null) pstmt.close();
                if (conn != null) conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}

javac ExtractColumnValues.java
java ExtractColumnValues