java - 瓦丁 : Widget set is not getting loaded.

Question

我能够将 Vaadin 模块集成到我们基于 Spring 的应用程序中。集成后，我想运行甘特图的演示，它是 Vaadin 的附加组件，并在 github here 上找到了它。 。文件夹内有一个演示项目。一切都很好，除了我的小部件集有问题。

问题截图:

我还收到一个不可序列化的错误:

Nov 18, 2015 3:16:48 PM org.apache.catalina.session.StandardManager startInternal
SEVERE: Exception loading sessions from persistent storage
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.journaldev.spring.Vaadin.Util$5
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1355)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2000)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1924)

用户界面代码:

@Theme("demo")
@SpringUI
@SuppressWarnings("serial")
public class MyVaadinUI extends UI {


    @WebServlet(value = "/testvaadin", asyncSupported = true)
    @VaadinServletConfiguration(productionMode = false, ui = MyVaadinUI.class, widgetset = "org.tltv.gantt.demo.DemoWidgetSet")
    public static class Servlet extends SpringVaadinServlet {
    }

// Code for gaant-chart taken from demo, code too big and not important //for error
// Pastebin link : http://pastebin.com/mi1ZhH30
}

POM.xml:

Vaadin 插件 http://maven.vaadin.com/vaadin-addons

<!--- Vaadin dependency -->
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-spring</artifactId>
    <version>1.0.0</version>
</dependency>

<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-themes</artifactId>
    <version>${vaadin.version}</version>
</dependency>

<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-client-compiled</artifactId>
    <version>${vaadin.version}</version>
</dependency>

<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-push</artifactId>
    <version>${vaadin.version}</version>
</dependency>

<dependency>
    <groupId>org.tltv.gantt</groupId>
    <artifactId>gantt-addon</artifactId>
    <version>0.9.0</version>
</dependency>

web.xml:

 <servlet-mapping>
        <servlet-name>vaadin-spring</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
    <servlet>
        <servlet-name>cometd</servlet-name>
        <servlet-class>org.cometd.server.CometDServlet</servlet-class>
        <init-param>
            <param-name>timeout</param-name>
            <param-value>300000</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>

我做错了什么？请告诉我。多谢。 :-)

Answer 1

尝试运行mvn clean install来编译小部件集。如果您不想使用命令行，请右键单击您的项目，运行方式 > Maven 安装。

您还可以在 Eclipse 中编译您的小部件集。打开您的 widgetset 文件并单击 Eclipse 菜单中的“齿轮”符号。