MySql数据库连接失败--org.apache.tomcat.dbcp.dbcp.SQLNestedException
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今天再做手机连接服务器测试的时候,tomcat突然抛出:
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Could not create connection to database server. Attempted reconnect 3 times. Giving up.)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
at com.safe.database.DBConnection.getConnection(DBConnection.java:20)
at com.safe.dao.impl.UserDaoImpl.validatorByNameAndPwd(UserDaoImpl.java:29)
异常,查看异常信息,发现是连接数据库时候出错。就想到,前段时间打开mysql的时候输完密码,mysql的小窗口就消失了,还以为是数据库出问题,卸载了重装。后来每次开电脑都会出现这个问题,就到网上搜了原因:是因为mysql服务没启动。然后立马看了服务,还真没启动,启动之后再输密码就连上数据库了。想到这我看了一眼服务,又没开。感慨我的无知( ⊙ o ⊙ )啊!
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