帮我编写一个mysql使用jdbc获取当前库所有表名的工具类

好的，下面是一个获取当前库所有表名的工具类代码示例：

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class MysqlJdbcUtil {
    // 数据库连接配置
    private static final String URL = "jdbc:mysql://localhost:3306/test";
    private static final String USERNAME = "root";
    private static final String PASSWORD = "123456";

    // 获取数据库连接
    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection(URL, USERNAME, PASSWORD);
    }

    // 获取当前库所有表名
    public static List<String> getTableNames() throws SQLException {
        List<String> tableNames = new ArrayList<>();
        Connection conn = null;
        ResultSet rs = null;
        try {
            conn = getConnection();
            DatabaseMetaData metaData = conn.getMetaData();
            rs = metaData.getTables(null, null, null, new String[] { "TABLE" });
            while (rs.next()) {
                tableNames.add(rs.getString("TABLE_NAME"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (rs != null) {
                rs.close();
            }
            if (conn != null) {
                conn.close();
            }
        }
        return tableNames;
    }
}

使用方法：

try {
    List<String> tableNames = MysqlJdbcUtil.getTableNames();
    System.out.println(tableNames);
} catch (SQLException e) {
    e.printStackTrace();
}