JDBC

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.47</version>
</dependency>

代码：

public class TestJdbc {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        //配置信息
        //?useUnicode=true&characterEncoding=utf-8 解决中文乱码

        String url ="jdbc:mysql://localhost:3306/jdbc?useUnicode=true&characterEncoding=utf-8";
        String username="root";
        String password="123456";

        //1.加载驱动
        Class.forName("com.mysql.jdbc.Driver");
        //2.连接数据库
        Connection connection = DriverManager.getConnection(url, username, password);

        //3.向数据库发送SQL的对象 PreparedStatement(安全的),Statement

        Statement statement = connection.createStatement();
        //4.编写SQL
        String sql="select * from users";
        //5.执行查询SQL，返回一个RasultSet : 结果集
        ResultSet rs = statement.executeQuery(sql);

        while (rs.next()){
            System.out.println("id="+rs.getObject("id"));
            System.out.println("name="+rs.getObject("name"));
            System.out.println("password="+rs.getObject("password"));
            System.out.println("email="+rs.getObject("email"));
            System.out.println("birthday="+rs.getObject("birthday"));
        }

        //关闭连接释放资源（一定要做！）先开后关
        rs.close();
        statement.close();
        connection.close();
    }
}