eclipse 小技巧 小设置

使用java开发的同学们，eclipse应该是都熟悉不过了吧，其中有一些小技巧，小设置记录一下，以防不备之需，都是用到时遇到的问题，一下内容也会不停地补充更新：

 

1）在eclipse安装目录下configuration\.settings目录下的 org.eclipse.ui.ide文件，这个文件保存了一些用户的小设置，其中SHOW_WORKSPACE_SELECTION_DIALOG参数决定了在启动时0是否显示workspace。

 

2）ctr + shift + R 或者 ctr + shift + H

查找文件

 

4) Syntax error,annotations are only available if source level is 5.0
解决办法：Project->Properties->Java Compiler->Compiler Compliance Level选择5.0或者以上的jdk版本

 

5) working set管理工作区域

Eclipse鼓励将不同的功能模块划分为独立的项目存在，这样不但结构清晰，组织起来还非常灵活，因为我们可以用feature对这些项目进行不同的组合，输出后得到具有不同功能的产品。

不过这样一来Package Explorer里的项目会以更快的速度增加，当你面对几十上百个项目时，工作效率必然大打折扣。幸好Eclipse提供了工作集（Working Set）的功能，它可以用来划分这些项目。

在Package Explorer视图的下拉菜单里选择Show->Working Sets，然后还是在它的菜单里选择Select Working Sets，在对话框里定义你的工作集，每个工作集要对应至少一个项目，按OK后你的项目就分好类了，没有归类的项目都放在名为Other Projects的工作集里。

6) "Initializing Java Tooling" or "Repository registry initialization" hang out when loading project

From http://tedvinke.wordpress.com/2010/06/21/eclipse-initializing-java-tooling-hangs/

Sometimes using SpringSource Tool Suite (STS) e.g. version 2.3.2- which is based on Eclipse – startup hangs on various operations:

• Initializing Java Tooling

• Repository registry initialization

STS/Eclipse does not seem to respond to anything – the UI freezes and that’s it! I’ve had this on several occassions with no apparent cause on my part. Usually it has something to do with fiddling with (adding libraries to) the classpath and/or cleaning the project. Some users report Eclipse hangs at “Initializing Java Tooling” at 30% for 20-30 secs after which everything continues normally, but I don’t have that much luck

I’ve tried the most suggested actions in forum posts, such a starting STS/Eclipse with the -clean parameter which most of the times doesn’t work in my configuration. If you inspect the .log files under the workspace’s .metadata folder you might find something of interest, but quite often STS/Eclipse just hangs without anything written to the log in my case. The largeness of your project or the amount of projects quite often seem to be one of the causes. Here are a few workarounds and/or solutions that might prove succesful:

• Start a new workspace and import the project back in – which is just plain tedious and annoying although it quite often works
• Close all projects before you exit Eclipse after which Eclipse normally restarts.
• Some users have reported it does seem related to a configured Tomcat server instance. If you have this configured a possible workaround instead of reimporting your projects in a new workspace, is to rename the .project file in workspace/Servers, restarting, removing and adding the Server configuration again.
• The solution I found – which seems to work most of the times – is to remove or rename the .projects folder in .metadata/.plugins/org.eclipse.core.resources in the workspace folder. This doesn’t seem to affect any project and the .project folder will be recreated when Eclipse restarts.

Hopefully someone with this problem saves some time because of this. Ofcourse the real problem needs to be addressed by the guys and girls over at Eclipse.

 

7)  Eclipse中Team subclipse在提交或更新时遇到文件被锁的信息

在eclipse里提交和更新文件是抱错。

Attempted to lock an already-locked dir
svn: Working copy 'F:\workspace\WebFrame\WebRoot\attach\prodrelation' locked

执行“清除”操作后，问题解决了。
很多操作，例如中断提交，都会进入这种工作拷贝的锁定状态。

 

8) 在Eclipse中servers中遇到web项目有关无法同步的问题时

请查看如下项目是否都是"Synchronized"状态

如果不是同步状态的话，对应项目使用maven重新maven install编译。

 

9) 调试过程中的临时结果 快捷键

选中代码区 ctr+shift+D