大神求解,Myeclipse链接Mysql出错了
这是我程序的bug还是系统bug?好像死循环在里面了...
求大神帮忙想想办法...
补充一下:经过10分钟的等待,跳出:
数据库连接失败 SQLException
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:673)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1084)
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.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
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:317)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at JDBCTest.main(JDBCTest.java:28)
Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3052)
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:597)
... 16 more
求帮忙... 1.可能是mysql的驱动jar包的版本问题,建议换不同版本的jar包试试
2.检查mysql服务器的数据库连接等待时间,如果时间过长,修改配置,重启mysql,再重试.
3.检查mysql的权限,检查root是否可以本地访问. 1、确定数据库是否开启
2、用户名、密码、端口号是否正确 ╰つ今生只为 发表于 2014-2-9 10:51 static/image/common/back.gif
1、确定数据库是否开启
2、用户名、密码、端口号是否正确
都开启的,使用dos是完全可以进去的,网页管理也是可以直接查看的 好像是驱动的问题。 沙粒 发表于 2014-2-21 12:45 static/image/common/back.gif
好像是驱动的问题。
有可能,不过重装了几次都没用,唉!后来果断换了SQL2008 楼主加油,鱼C加油!我们都看好你哦! {:1_1:}你改了mysql默认的3306端口吗?改成8090了?可以去这里看看java连接 sqlservermysql oracle 数据库源代码
http://bbs.fishc.com/thread-40071-1-1.html
yj269172025 发表于 2014-2-23 16:01 static/image/common/back.gif
有可能,不过重装了几次都没用,唉!后来果断换了SQL2008
{:1_1:}驱动有问题重装mysql解决不了问题的 插 这头像 好有个性 ,不愧奇葩,你是想证明你是抽象派的:mad: mysql的端口号不是3306吗? 改了mysql默认端口号??? 没完过mysql只会玩sql和oracle你也是学Java的? 3306
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