jdbc连接docker安装的mysql的步骤

1. 安装 mysql 服务

2. 安装 jdk1.8

3. 安装 idea

4. 下载 jar 包 mysql-connector-java-8.0.28.jar

[下载地址]

创建数据库、数据表

CREATE DATABASE `jdbc` CHARACTER SET utf8 COLLATE utf8_general_ci;

CREATE TABLE `users` (`id` int(11) NOT NULL,
  `NAME` varchar(40) DEFAULT NULL,
  `PASSWORD` varchar(40) DEFAULT NULL,
  `email` varchar(60) DEFAULT NULL,
  `birthday` date DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

创建 Project->Maven->jdbc(name)

下载 jar 包. mac 选择 Platform Independent

导入 jar 包

1. 下载目录解压 mysql-connector-java-8.0.28.zip，复制 mysql-connector-java-8.0.28.jar
2. 打开 idea，新建 lib 目录, 将复制的 jar 包，粘贴到 lib 目录下
   
3. 右键点击 mysql-connector-java-8.0.28.jar，选择 Add as Library

连接数据库, 创建 Demo.java

import java.sql.*;

public class Demo {
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://127.0.0.1:3306/jdbc?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";

    static final String USER = "root";
    static final String PASS = "root";

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

        try {Class.forName(JDBC_DRIVER);

            System.out.println(" 连接数据库...");
            connection = DriverManager.getConnection(DB_URL, USER, PASS);

            System.out.println(" 实例化 Statement 对象 ");
            statement = connection.createStatement();
            String sql;
            sql = "select * from users";
            ResultSet rs = statement.executeQuery(sql);
            while (rs.next()) {int id = rs.getInt("id");
                String name = rs.getString("name");
                String password = rs.getString("password");
                String email = rs.getString("email");
                String bidthday = rs.getString("birthday");
                System.out.println("ID: " + id);
                System.out.println(", 名字: " + name);
                System.out.println(", 密码: " + password);
                System.out.println(", 邮箱: " + email);
                System.out.println(", 生日: " + bidthday);
            }
            rs.close();
            statement.close();
            connection.close();} catch (SQLException e){e.printStackTrace();
        } catch (Exception e) {e.printStackTrace();
        } finally {
            try {if (statement != null) statement.close();} catch (SQLException e2) { }

            try {if (connection != null) connection.close();} catch (SQLException e) {e.printStackTrace();
            }
        }
        System.out.println("Goodbye");
    }
}

点击运行，结果如下