无法到MySQL通过本地主机

我的Java程序prog编制，并与无法到MySQL通过本地主机

mysqlCon = (Connection) DriverManager.getConnection("jdbc:mysql://10.129.70.44:3306/test", "root", "root");

执行罚款，但是当我键入

mysqlCon = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");

它faling

给予以下错误连接：

Exception in thread "main" 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:57) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:532) 
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) 
    at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121) 
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:355) 
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2479) 
    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:57) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:532) 
    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:620) 
    at java.sql.DriverManager.getConnection(DriverManager.java:222) 
    at just.main(just.java:17) 
Caused by: java.net.ConnectException: Connection refused 
    at java.net.PlainSocketImpl.socketConnect(Native Method) 
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327) 
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193) 
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180) 
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384) 
    at java.net.Socket.connect(Socket.java:546) 
    at java.net.Socket.connect(Socket.java:495) 
    at java.net.Socket.<init>(Socket.java:392) 
    at java.net.Socket.<init>(Socket.java:235) 
    at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259) 
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:305) 
    ... 15 more

同样，当我做$的mysql -u -hlocalhost根-p在Ubuntu 12.04终端及其连接到MySQL>

，但是当我打字$远程登录本地主机3306我收到以下错误：

Trying 127.0.0.1... 
telnet: Unable to connect to remote host: Connection refused

来源

2013-04-22 user1709815

10.129.70.44不是本地主机。但仍然，远程登录的东西应该工作。 – 2013-04-22 20:07:00

您需要将全部授予root从本地主机。

GRANT ALL ON *.* TO 'root'@'localhost'

来源

2013-04-22 20:08:16

我已经尝试过这个选项... – user1709815 2013-04-22 20:25:04

你尝试127.0.0.1而不是本地主机？

附注：如果您有任何mysql客户端，请先在那里尝试。可能您可以尝试先从命令提示符进行连接。如果它有效，那么你可以使用它。

来源

2013-04-22 22:14:04

我也试过了...，会不会安装mysql客户端服务器？ – user1709815 2013-04-23 05:52:52

安装客户端使您可以轻松使用mysql。您可能会发现连接方面的问题。 – 2013-04-23 12:14:56

无法到MySQL通过本地主机

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