标签：local 查询 this sele 分享 res 技术 http connector
java环境是：
jdk1.8 java version "1.8.0_171"
1.安装mysql的jar
下载地址：http://dev.mysql.com/downloads/connector/j/
我下载的时候，一直打不开，开了蓝灯很快就打开了。蓝灯有时候不可以用
jar支持的版本：
下载完成后，需要eclipse加入jar包：即可把jar包放进项目里
2.创建数据库：
CREATE TABLE `student` ( `id` int(11) NOT NULL, `name` varchar(255) DEFAULT NULL, `age` int(11) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
3.编写java代码
package test; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class MysqlDemo { final static String JDBC_DRIVER = "com.mysql.cj.jdbc.Driver"; final static String DB_URL = "jdbc:mysql://localhost:3306/mv?serverTimezone=UTC"; final static String USER = "root"; final static String PASS = "root"; public static void main(String[] args) throws ClassNotFoundException, SQLException { Connection conn = null; Statement stmt = null; Class.forName(JDBC_DRIVER); System.out.println("连接数据库..."); conn = DriverManager.getConnection(DB_URL, USER, PASS); // 执行查询 stmt = conn.createStatement(); String sql = "select * from student"; ResultSet rs = stmt.executeQuery(sql); // 展开结果集 while (rs.next()) { int id = rs.getInt("id"); String name = rs.getString("name"); int age = rs.getInt("age"); System.out.println("ID:" + id); System.out.println("name:" + name); System.out.println("age:" + age); } } }
执行结果：成功
4.遇到的问题：
4.1 The server time zone value ‘?й???????‘ is unrecognized or represents more than one time zone
解决：
jdbc:mysql://localhost:3306/mv?serverTimezone=UTC
4.2 Loading class `com.mysql.jdbc.Driver‘. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver‘. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary
解决：原来的driver有修改
final static String JDBC_DRIVER = "com.mysql.cj.jdbc.Driver";
标签：local 查询 this sele 分享 res 技术 http connector
原文地址：https://www.cnblogs.com/myvic/p/9052214.html
