无法使用eclipse在Web应用程序项目（谷歌应用程序引擎）中创建servlet

Question

I am following Google App Engine Guestbook sample to create a new servlet in src folder. When the create servlet dialog open, I found I can't choose or type "Web Project" and can't browse to select "source folder" either.

The eclipse is version 3.5, jdk I installed is 1.6.0_14-b08

I am working on Windows XP Pro with SP3.

Before I tried to create new servlet, I can compile and start the server, after visiting http://localhost:8080 , sample app works fine.

Please advise. Thanks.

Answer 1

This happens if none of your projects were created as "Dynamic Web Project". For example if you did :

New --> Maven Project --> maven-archetype-webapp --> etc.

To correct this either create a project via:

New --> Dynamic Web Project

or right-click your existing project and do:

Properties --> Project Facets --> Convert to facet form...

Tick Dynamic Web Module (verifying the version) then click OK

Answer 2

Same here. In the Create Servlet dialog (opened by right clicking on the package in my project, New > Other, then choose Web > Servlet), there is no choice in the "Project" drop down list:

The "Browse" buttons for Source folder and Java package doesn't work either.

Installing GWT Web Project and adding such support in the existing project don't help. BTW, the project is already a Web Application Project created following the instructions stated here: http://code.google.com/appengine/docs/java/gettingstarted/creating.html

Instead, I have to create a Class and then manually set the superclass as javax.servlet.http.HttpServlet to add a servlet to the project.

Is it a bug in Google Plugin or Eclipse?

Answer 3

That may be because you did not installed the GWT (Google Web Toolkit) eclipse plugin first.

alt text http://download.instantiations.com/DesignerDoc/integration/latest/docs/html/gwt/images/web-new-project1.gif

See also this GWT Web Project guide .

Answer 4

It's seems to be an old known missing feature/bug.. Gae issue link From my experience today (06-2014), it has still not been dealt with yet.

Reported by Lars.Vo...@gmail.com, Oct 22, 2009

Eclipse provides a wizard to create new servlets. This wizard allows to create servlets for dynamic web projects only.

The projects created the the Google Plugin do not have the right nature, so you cannot use the wizard to create servlets.

Can you please fix this?

Example:

• Create a new "Web Application Project". Select File -> New -> Other -> Servlet
• Look at the wizard

Answer 5

这个问题的解决方案非常简单，在记事本中创建一个简单的servlet文件并将该文件复制到您的项目包文件夹中，然后开始在eclipse中编辑该文件。