eclipse查询mysql数据库

import java.sql.*;

public class MySQLQueryExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/database_name";
        String username = "your_username";
        String password = "your_password";

        try {
            // 加载MySQL JDBC驱动程序
            Class.forName("com.mysql.jdbc.Driver");

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

            // 创建查询语句
            String query = "SELECT * FROM table_name";

            // 执行查询
            Statement statement = conn.createStatement();
            ResultSet resultSet = statement.executeQuery(query);

            // 处理查询结果
            while (resultSet.next()) {
                // 获取结果集中的数据
                String column1 = resultSet.getString("column1");
                int column2 = resultSet.getInt("column2");

                // 处理数据...
            }

            // 关闭连接
            resultSet.close();
            statement.close();
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}