部署到Heroku時com.vaadin.ui.UI上的ClassNotFoundException

Question

我將Vaadin應用程序部署到Heroku，但它崩潰。

Heroku的日誌-t返回此：

java.lang.ClassNotFoundException: com.vaadin.ui.UI 

我的POM文件看起來是這樣的：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 

<modelVersion>4.0.0</modelVersion> 
<groupId>SudokuForFun</groupId> 
<artifactId>SudokuForFun</artifactId> 
<version>0.0.1-SNAPSHOT</version> 
<packaging>war</packaging> 
<name>sudoku-for-fun</name> 
<build> 
    <sourceDirectory>src</sourceDirectory> 
    <resources> 
     <resource> 
      <directory>src</directory> 
      <excludes> 
       <exclude>**/*.java</exclude> 
      </excludes> 
     </resource> 
    </resources> 
    <plugins> 
     <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-eclipse-plugin</artifactId> 
      <version>2.9</version> 
     </plugin> 
     <plugin> 
      <artifactId>maven-war-plugin</artifactId> 
      <version>2.4</version> 
      <configuration> 
       <warSourceDirectory>WebContent</warSourceDirectory> 
       <failOnMissingWebXml>false</failOnMissingWebXml> 
      </configuration> 
     </plugin> 
     <plugin> 
      <artifactId>maven-compiler-plugin</artifactId> 
      <version>3.1</version> 
      <configuration> 
       <source>1.7</source> 
       <target>1.7</target> 
      </configuration> 
     </plugin> 
    </plugins> 
</build> 
<dependencies> 
    <dependency> 
     <groupId>eu.hurion.vaadin.heroku</groupId> 
     <artifactId>vaadin-for-heroku</artifactId> 
     <version>1.0</version> 
    </dependency> 
    <dependency> 
     <groupId>com.vaadin</groupId> 
     <artifactId>vaadin-server</artifactId> 
     <version>7.5.4</version> 
    </dependency> 
    <dependency> 
     <groupId>com.vaadin</groupId> 
     <artifactId>vaadin-client-compiled</artifactId> 
     <version>7.5.4</version> 
    </dependency> 
    <dependency> 
     <groupId>com.vaadin</groupId> 
     <artifactId>vaadin-client</artifactId> 
     <version>7.5.4</version> 
    </dependency> 
    <dependency> 
     <groupId>com.vaadin</groupId> 
     <artifactId>vaadin-push</artifactId> 
     <version>7.5.4</version> 
    </dependency> 
    <dependency> 
     <groupId>com.vaadin</groupId> 
     <artifactId>vaadin-themes</artifactId> 
     <version>7.5.4</version> 
    </dependency> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>4.11</version> 
     <scope>test</scope> 
    </dependency> 
    <dependency> 
     <groupId>javax.servlet</groupId> 
     <artifactId>javax.servlet-api</artifactId> 
     <version>3.0.1</version> 
     <scope>provided</scope> 
    </dependency> 
</dependencies> 

如果我跑在我的本地服務器的應用程序（Tomcat）的它正常運行。有沒有人有過這個？我認爲這是一個非常簡單的問題，但我忽略了它。

我的項目是在Github

Answer 1

主辦我只是找到了答案由我自己。我只需要將下面的插件添加到pom.xml中，現在我不再發生這種異常。

 <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-dependency-plugin</artifactId> 
      <version>2.4</version> 
      <executions> 
       <execution> 
        <id>copy-dependencies</id> 
        <phase>package</phase> 
        <goals> 
         <goal>copy-dependencies</goal> 
        </goals> 
       </execution> 
      </executions> 
     </plugin> 

我不知道爲什麼，但它看起來是與複製依賴的東西......