WAR文件中缺少编译的类 [英] Compiled classes missing in WAR file

问题描述

我正在研究一个简单的JSF 2应用程序，我遇到了托管bean的问题。我收到的错误是说找不到bean，当我查看战争时它没有任何已编译的bean。在我的pom.xml中，我有以下内容：

I'm working on a simple JSF 2 application and I'm having trouble with the managed beans. I was getting errors saying that the bean cannot be found and when I looked at the war it didn't have any compiled beans. In my pom.xml I had the following:

<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>com.traintrack</groupId>
<artifactId>test</artifactId>
<version>SNAPSHOT</version>
<packaging>war</packaging>
<name>test</name>
<build>
    <outputDirectory>src/main/webapp/WEB-INF/classes</outputDirectory>
    <plugins>
        <plugin>
            <groupId>org.jboss.as.plugins</groupId>
            <artifactId>jboss-as-maven-plugin</artifactId>
            <version>7.7.Final</version>
        </plugin>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <warSourceDirectory>${basedir}/WebContent</warSourceDirectory>
                <failOnMissingWebXml>false</failOnMissingWebXml>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.0</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
    </plugins>
</build>

如果删除WebContent文件夹来自warSourceDirectory我在war文件中得到了我的项目的其余部分，但这似乎不对。该文件是由eclipse生成的，所以我认为它没问题。在WEB-INF中有一个类文件夹，它是空的。

If I remove the WebContent folder from the warSourceDirectory I get the rest of my project in the war file but this doesn't seem right. The file was generated by eclipse so I would assume it's ok. In WEB-INF there is a classes folder which is empty.

我的项目文件夹结构是：

My project folder structure is:

test
- src/
  - sample/
    - sampleBean.java
- WebContent/
  - sample.xhtml
  - WEB-INF/
    - faces-config.xml
    - web.xml
  - META-IF/

但是我编译的war文件的结构是这样的：

but my compiled war file's structure is like this:

test
  - sample.xhtml
  - WEB-INF/
    - faces-config.xml
    - web.xml
    - classes/
  - META-IF/

我的war文件中应包装什么以及编译的bean应该在哪里？

What should be packaged in my war file and where should the compiled bean be?

谢谢

推荐答案

您的问题是标准的Eclipse Web Tools不仅使用完全不同的目录布局Apache Maven用于Web应用程序，但也使用不同的方式指定库依赖项。解决此问题的最简单方法是更改​​项目以使用Maven约定并重新导入项目：

Your problem is that standard Eclipse Web Tools not only uses a completely different directory layout from that used by Apache Maven for web applications, but also uses a different way to specify library dependencies. The easiest way to fix this is to change your project to use the Maven conventions and re-import your project:

1. Move all of your main (not unit test) java source files into directory `src/main/java`;
2. Move all of your unit test java source files into directory `src/test/java`;
3. Move all the files in WebContent into directory `src/main/webapp` (excluding class files and jar files);
4. Remove the following from your pom.xml:
    a. `<outputDirectory>...</outputDirectory>`;
    b. `<warSourceDirectory>${basedir}/WebContent</warSourceDirectory>`;
5. Delete the project from eclipse (but not the source files!);
6. Execute `mvn eclipse:clean` on your project from a command line;
7. Ensure that the .project file, .classpath file and content of .settings directory have been removed (manually if necessary);
8. Re-import the project into Eclipse as a 'Maven' project.

由于这是一个webapp，此时可能会出现编译错误，因为你的pom.xml文件似乎没有依赖关系。至少，您需要：

As this is a webapp, you will likely have compilation errors at this point as your pom.xml file appears to have no dependencies in it. At a minimum, you will need:

<dependencies>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
  </dependency>
</dependencies>

最后，唯一的情况是你应该指定 maven-eclipse-你的pom.xml文件中的插件是你的Eclipse版本是否超过4年左右。此插件与现在内置到Eclipse中的Maven集成不兼容。使用的唯一安全目标是 eclipse：clean ，用于删除旧的eclipse项目配置。

Finally, the only circumstance in which you should specify the maven-eclipse-pluginin your pom.xml file is if your version of Eclipse is older than 4 years or so. This plugin is not compatible with the Maven integration that is now built into Eclipse. The only safe goal to use is eclipse:clean for deleting old eclipse project configuration.

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