一直运行的很好的项目，突然今天不能运行，查看后台错误日志如下：
2019-10-29 21:07:01,631 [Druid-ConnectionPool-Create-632550973] ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection SQLException, url: jdbc:mysql://localhost:3306/website?characterEncoding=UTF-8&useUnicode=true&useSSL=false, errorCode 1862, state HY000
java.sql.SQLException: Your password has expired. To log in you must change it using a client that supports expired passwords.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4187)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4119)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:927)
at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1709)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1252)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2483)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2516)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2301)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.GeneratedConstructorAccessor37.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1558)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1623)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2468)
根据上面的错误日志，可以得知是创建 DruidDataSource 数据源失败，创建失败的原因是 MySQL 密码过期了，这就需要我们修改 MySQL 数据库密码。修改 MySQL 数据库密码如下：
SET PASSWORD FOR testuser = PASSWORD("123456");testuser 指 mysql 数据库用户名。
