MySQL8连接JDBC

资源参考

第一步：先在mysql里新建数据库与表

CREATE DATABASE jdbc_demo CHARACTER SET utf8 COLLATE utf8_general_ci;

USE jdbc_demo;

CREATE TABLE `users`(
	id INT PRIMARY KEY,
	NAME VARCHAR(40),
	PASSWORD VARCHAR(40),
	email VARCHAR(60),
	birthday DATE
);

INSERT INTO `users`(id,NAME,PASSWORD,email,birthday)
VALUES(1,'zhansan','123456','zs@sina.com','1980-12-04'),
(2,'lisi','123456','lisi@sina.com','1981-12-04'),
(3,'wangwu','123456','wangwu@sina.com','1979-12-04')

第二步：在idea里新建一个java工程，并添加mysql依赖
(推荐用maven)

	<dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.23</version>
    </dependency>

第三步：输入代码
注意：mysql8的语法与之前版本的有所不同

package org.example;

import java.sql.*;

/**
 * @author Riter
 */
public class Test {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        //1.加载驱动
        Class.forName("com.mysql.cj.jdbc.Driver");

        //2.用户信息和url
        String url = "jdbc:mysql://localhost:3306/jdbc_demo?useSSL = false & serverTimezone=Asia/Shanghai ";
        String username = "root";
        String password = "root";

        //3.连接成功，数据库对象
        Connection connection = DriverManager.getConnection(url, username, password);

        //4.执行SQL的对象
        Statement statement = connection.createStatement();

        //5.执行SQL对象去执行SQL，可能存在结果，查看返回结果
        String sql = "Select * From users";
        ResultSet resultSet = statement.executeQuery(sql);
        while(resultSet.next()){
            System.out.println("id = "+resultSet.getObject("id"));
            System.out.println("name = "+resultSet.getObject("name"));
            System.out.println("pwd = "+resultSet.getObject("password"));
            System.out.println("email = "+resultSet.getObject("email"));
            System.out.println("birth = "+resultSet.getObject("birthday"));
        }

        //6.释放连接
        resultSet.close();
        statement.close();
        connection.close();
    }
}