MYSQL 1045 Access denied for user 'root'@'localhost' 解决方案

最近数据库集体异常？今天又一个服务器出问题，看 log

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919)
	at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694)
	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1244)
	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2397)
	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215)
	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	at sun.reflect.GeneratedConstructorAccessor273.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:148)
	at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:211)
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:142)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1377)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1431)
	at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1844)

Navicat 报错信息如下：

好吧，MYSQL 大爷又闹脾气了，能咋办，整呗。

解决方案（Linux）

1.停 mysql 服务

/etc/init.d/mysqld stop
或
service mysqld stop

2.进入 mysql 安装目录 bin/ 使用 safe 模式，进行重启(后面这一段 --skip-grant-tables 不是注释哦，执行完毕ctrl+z跳出)

./mysqld_safe --skip-grant-tables  

3.进入 mysql，此时已经不会验证密码了，随便输入一个就能进

mysql -uroot -p

4.修改密码(为了方便，我后面又改回原密码了 QAQ)

use mysql
update user set password=PASSWORD("你的密码") where User ='root';

好啦，再试一下 MYSQL 是不是已经好了呢

分享使我快乐！！！