tomcat怎么连接mysql数据库表

import java.sql.*;

public class Main {
  public static void main(String[] args) {
    Connection connection = null;
    try {
      // 连接数据库
      connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/your_database_name", "username", "password");
      
      // 执行SQL查询或更新
      Statement statement = connection.createStatement();
      ResultSet resultSet = statement.executeQuery("SELECT * FROM your_table_name");
      while (resultSet.next()) {
        // 处理查询结果
      }
      
      // 关闭连接
      resultSet.close();
      statement.close();
      connection.close();
    } catch (SQLException e) {
      e.printStackTrace();
    }
  }
}