求助！mysqL连接报Communications link failure

qq_32764015 2016-03-04 04:22:16

用jdbc连接：jdbc.driver.class=com.mysql.jdbc.Driver
jdbc.connection.url=jdbc:mysql://localhost:3306/smbms?useUnicode=true&characterEncoding=utf-8
jdbc.connection.user=root
jdbc.connection.password=bdqn
如上配置文件，然后通过java一些方法查出该数据库一些表的信息没有任何问题。
但是如果配置文件改成如下的：
jdbc.driver.class=com.mysql.jdbc.Driver
jdbc.connection.url=jdbc:mysql://localhost:3306/smbms?useUnicode=true&characterEncoding=utf-8
jdbc.connection.user=root
jdbc.connection.password=bdqn
然后调用java程序就会报如下错误：
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

Last packet sent to the server was 0 ms ago.
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:353)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2001)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
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:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at BaseDao.getConnection(BaseDao.java:24)
at SelectTab.selectTab(SelectTab.java:20)
at CreateXml2View.main(CreateXml2View.java:12)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

Last packet sent to the server was 0 ms ago.
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:353)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:615)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1014)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1930)
... 14 more
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:168)
at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:113)
at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:160)
at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:188)
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1955)
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:547)
... 16 more
上网搜了半天，仍然解决不了，求大神帮忙，在线等谢谢了

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