测试tomcat连接mysql数据库

<Resource name="jdbc/TestDB" auth="Container"
          type="javax.sql.DataSource" username="your_username"
          password="your_password" driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost:3306/your_database_name"/>

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

public class TestDatabaseConnection {
    public static void main(String[] args) {
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        try {
            // 获取数据库连接
            connection = DriverManager.getConnection("jdbc:tomcat:jdbc/TestDB");
            
            // 创建Statement对象
            statement = connection.createStatement();
            
            // 执行查询语句
            resultSet = statement.executeQuery("SELECT * FROM your_table_name");

            // 处理查询结果
            while (resultSet.next()) {
                String column1 = resultSet.getString("column1");
                String column2 = resultSet.getString("column2");
                
                // 输出查询结果
                System.out.println("column1: " + column1 + ", column2: " + column2);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (resultSet != null) {
                    resultSet.close();
                }
                if (statement != null) {
                    statement.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}