gae eclipse plugin 配置及jsp编译错误解决

1.禁用updatecheck

在路径： System.getProperty("user.home")

出创建一个文件名称为：".appcfg_no_nag" 

可以禁止在启动Appserver时访问ttps://appengine.google.com/api/updatecheck

2.解决jsp编译错误

在使用Eclipse gwt plugin时如果有jsp文件在发布时可能会出现编译无法通过的错误，此时需要在环境变量中加入 CLASSPATH 值中需要添加当前路径 和JDK的lib路径

错误信息：

Unable to update:
java.lang.RuntimeException: Cannot get the System Java Compiler. Please use a JDK, not a JRE.
    at com.google.appengine.tools.admin.Application.compileJavaFiles(Application.java:763)
    at com.google.appengine.tools.admin.Application.compileJsps(Application.java:750)
    at com.google.appengine.tools.admin.Application.createStagingDirectory(Application.java:582)
    at com.google.appengine.tools.admin.AppAdminImpl.doUpdate(AppAdminImpl.java:370)
    at com.google.appengine.tools.admin.AppAdminImpl.update(AppAdminImpl.java:53)
    at com.google.appengine.eclipse.core.proxy.AppEngineBridgeImpl.deploy(AppEngineBridgeImpl.java:433)
    at com.google.appengine.eclipse.core.deploy.DeployProjectJob.runInWorkspace(DeployProjectJob.java:148)
    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
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