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$ docker network create my_network

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$ docker run -d --name web_container --network my_network web_image

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$ docker run -d --name db_container --network my_network db_image

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jdbc:mysql://db_container:3306/my_database

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webÈÝÆ÷µÄDockerfile£º

FROM ubuntu:latest
RUN apt-get update
RUN apt-get install -y apache2
EXPOSE 80
CMD ["apache2ctl", "-D", "FOREGROUND"]

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FROM ubuntu:latest
RUN apt-get update
RUN apt-get install -y mysql-server
EXPOSE 3306
CMD ["mysqld"]

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webÈÝÆ÷ÖеÄJava´úÂëʾÀý£º

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

public class Main {
    public static void main(String[] args) {
        String url = "jdbc:mysql://db_container:3306/my_database";
        String user = "root";
        String password = "password";
        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement()) {
            String query = "SELECT * FROM my_table";
            ResultSet rs = stmt.executeQuery(query);
            while (rs.next()) {
                System.out.println(rs.getString("column1"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

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