安装完mysql,远程工具连接显示serverTimezone问题

连接出现The server time zone value '?й???????' is unrecogni异常。

方案：

打开mysql *** 作窗口，连接上mysql，设置timezone：

输入以下mysql指令：show variables like ‘%time_zone%'

命令： show variables like '%time_zone%'

默认的 time_zone = “SYSTEM”我们修改time_zone的值：set global time_zone = “+8:00”

命令：set global time_zone = "+8:00"

然后在重新试一下客户端就可以连接成功了！

当我用JDBC连接MySql数据库时，编译报了如下错误：错误1：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.这要求我们注册驱动时，把Class.forName("com.mysql.jdbc.Driver")改成 Class.forName("com.mysql.cj.jdbc.Driver")当我信息满满的修改之后重新编译时，再次出现了错误：错误2：Fri Feb 22 08:55:38 CST 2019 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.这要求我们在设置url参数时，将useSSL=false，修改后 jdbc:mysql://localhost:3306/ds3?useSSL=false当我修改后，本以为这下应该没问题了，没想到，再一次出现了问题错误3：Exception in thread "main" java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.这要求我们修改时区，修改成jdbc:mysql://localhost:3306/ds3?useSSL=false&serverTimezone=UTC终于，不在报错误了。错误4：当我们配置xml文件时，要把&转为其本身的转义字符配置properties文件的urlurl=jdbc:mysql:///ds3?useSSL=false&serverTimezone=UTC配置xml文件的url<property name="url">jdbc:mysql://localhost:3306/ds3?useSSL=false&serverTimezone=UTC</property>

package com.hu.demoimport java.sql.Connectionimport java.sql.DriverManagerimport java.sql.PreparedStatementimport java.sql.SQLExceptionpublic class DBHelper {public static final String url = "jdbc:mysql://127.0.0.1/student"public static final String name = "com.mysql.jdbc.Driver"public static final String user = "root"public static final String password = "root"public Connection conn = nullpublic PreparedStatement pst = nullpublic DBHelper(String sql) {try {Class.forName(name)//指定连接类型conn = DriverManager.getConnection(url, user, password)//获取连接pst = conn.prepareStatement(sql)//准备执行语句} catch (Exception e) {e.printStackTrace()}}public void close() {try {this.conn.close()this.pst.close()} catch (SQLException e) {e.printStackTrace()}}}你好：你的mysql驱动类加载的不对，你把localhost换成127.0.0.0；

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