eclipse 4.4 tomcat plugin 安装注意点

版本：

eclipse 4.4.1

apache-tomcat-7.0.57

插件下载地址：

http://www.eclipsetotale.com/tomcatPlugin.html#A3

安装方法：

• Download tomcatPluginVxxx.zip

• Unzip it in :
  - Eclipse_Home/dropins for Eclipse 3.4, 3.5 and 3.6
  - Eclipse_Home/plugins for Eclipse 2.1, 3.0, 3.1, 3.2 and 3.3

注意点：

 Installing Eclipse plugins on Windows Vista & 7 with User Access Control (UAC) on, fails if Eclipse is installed in the Program Files folder.

虽然eclipse能正常打开，且无任何错误信息，但实际未安装成功，Plugin未复制读取。

 It is a frustrating issue because the plugin installation appears to be complete: it will not issue any error message and, after restarting the platform, it will even show up properly in the Installation Details box. However, the plugins and features JARs are not copies, hence the plugin in not installed. 

解决方法：

There are several possible work arounds for this issue: (starting from the easiest)

• Before the installation, start Eclipse with "Run as Administrator" option.
• Turn off the pesky UAC (for the installation or, better yet, altogether). 
• Install Eclipse in a different folder. Eclipse doesn't have to be in the Program Files folder. 
• Switch to Linux or Mac.

出处：http://eclipse.dzone.com/articles/eclipse-plugin-installation