Vaadin 7.1.0 - 找不到DefaultWidgetSet

问题描述

我是Vaadin的新人，我正在尝试用这项技术进行一些测试。
我使用Tomcat 7服务器在Eclipse下将我的项目设置为Maven项目。

起初我开始使用Vaadin 7.0.0，一切都正常。现在我将版本从7.0.0更改为7.1.0，因为我喜欢测试推送功能。
与Vaadin 7.0.0一切正常，但由于我更改版本我得到错误：

 请求的资源[/VAADIN/widgetsets/com.vaadin.DefaultWidgetSet /com.vaadin.DefaultWidgetSet.nocache.js]没有从文件系统或通过类加载器找到。将widgetset和/或主题JAR添加到您的类路径或将文件添加到WebContent / VAADIN文件夹。 
  

我已经看到DefaultWidget是由Vaadin创建的，但我该怎么做？

解决方案

除非您将新的客户端组件添加到Vaadin项目中，否则无需编译WidgetSet。但是，Vaadin的默认配置假设您有一个。要超过此错误，只需删除< init-param> 标签中的 widgetset c> web.xml 。

 < servlet> 
< servlet-name> Your-SERVLET-NAME< / servlet-name> 
< servlet-class> com.vaadin.server.VaadinServlet< / servlet-class> 
< init-param> 
< param-name> UI< / param-name> 
< param-value> com.example.MyUI< / param-value> 
< / init-param> 
< init-param> 
< param-name> widgetset< / param-name> 
< param-value> another.path< / param-value> 
< / init-param> 
< / servlet> 
  

或者，您可以创建一个 .xml 文件在同一个包（例如 MyWSet.xml ）作为您的UI类，并在您的 web.xml 。

中的MyWSet.xml com.example ：

 <？xml version =1.0encoding =UTF-8？> 
<！DOCTYPE模块PUBLIC -  // Google Inc.//DTD Google Web Toolkit 1.7.0 // ENhttp://google-web-toolkit.googlecode.com/svn/tags/1.7 0.0 /发行源/型芯/ SRC / GWT-module.dtd> 
< module> 
< inherits name =com.vaadin.DefaultWidgetSet/> 
< / module> 
  

正确的 web.xml ：

 < servlet> 
< servlet-name> Your-SERVLET-NAME< / servlet-name> 
< servlet-class> com.vaadin.server.VaadinServlet< / servlet-class> 
< init-param> 
< param-name> UI< / param-name> 
< param-value> com.example.MyUI< / param-value> 
< / init-param> 
< init-param> 
< param-name> widgetset< / param-name> 
< param-value> com.example.MyWSet< / param-value> 
< / init-param> 
< / servlet> 
  

请记住，您不需要 .xml web.xml 中的c>后缀。最后，运行 mvn vaadin：compile 来编译这个widgetset。

I am new to Vaadin and I am trying to do some Tests with this technology.I Set up my project as a Maven Project under Eclipse with a Tomcat 7 Server.

At first I started with Vaadin 7.0.0 and everything works fine. Now I change the Version from 7.0.0 to 7.1.0 because I like to test the push functionality.With Vaadin 7.0.0 everything works fine, but since I changed the Version I get the error:

Requested resource [/VAADIN/widgetsets/com.vaadin.DefaultWidgetSet   /com.vaadin.DefaultWidgetSet.nocache.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.

I've read that the DefaultWidget is created by Vaadin but how can I do that?

解决方案

Unless you add new client-side components to a Vaadin project, you don't need to compile a WidgetSet. However, the default configuration of Vaadin assumes that you have one. To get past this error simply remove the <init-param> tag for the widgetset in your web.xml.

<servlet>
    <servlet-name>Your-SERVLET-NAME</servlet-name>
    <servlet-class>com.vaadin.server.VaadinServlet</servlet-class>
    <init-param>
        <param-name>UI</param-name>
        <param-value>com.example.MyUI</param-value>
    </init-param>
    <init-param>
        <param-name>widgetset</param-name>
        <param-value>another.path</param-value>
    </init-param>
</servlet>

Alternatively, you can create an .xml file in the same package (e.g. MyWSet.xml) as your UI class, and reference it in your web.xml.

MyWSet.xml in com.example package:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 1.7.0//EN" "http://google-web-toolkit.googlecode.com/svn/tags/1.7.0/distro-source/core/src/gwt-module.dtd">
<module>
    <inherits name="com.vaadin.DefaultWidgetSet" />
</module>

The right web.xml:

<servlet>
    <servlet-name>Your-SERVLET-NAME</servlet-name>
    <servlet-class>com.vaadin.server.VaadinServlet</servlet-class>
    <init-param>
        <param-name>UI</param-name>
        <param-value>com.example.MyUI</param-value>
    </init-param>
    <init-param>
        <param-name>widgetset</param-name>
        <param-value>com.example.MyWSet</param-value>
    </init-param>
</servlet>

Remember, you don't need the .xml suffix in your web.xml. Finally, run mvn vaadin:compile to compile this widgetset.

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