blocks|key|3178719|text|检查项目的“部署程序集”属性。我见过一些由mvn+eclipse:eclipse生成的项目有时会将资产部署到错误的位置。据我所知，新的部署程序集在Eclipse3.6+(Helios)的早期版本中存在一些问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3178720|entityMap^0|L|J|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Check the Deployment Assembly property of the project. I have seen some <code>mvn eclipse:eclipse</code> generated Eclipse projects sometimes have the assets being deployed to the wrong location. From what I can remember the new Deployment Assembly had some issues with earlier versions of Eclipse 3.6 (Helios).

blocks|key|2964944|text|您想要使用复制依赖项插件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2964945|请参阅this帖子和docs|offset|length|2964946|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/97640/force-maven2-to-copy-dependencies-into-target-lib|1|http://maven.apache.org/plugins/maven-dependency-plugin/copy-dependencies-mojo.html^0|0|3|4|0|A|4|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]|$D|U|E|V|1|W]]|A|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]|N|$5|I|J|K|A|$L|O]]]]

you want to use the copy-dependencies plugin

see <a href="https://stackoverflow.com/questions/97640/force-maven2-to-copy-dependencies-into-target-lib">this</a> post and the <a href="http://maven.apache.org/plugins/maven-dependency-plugin/copy-dependencies-mojo.html" rel="nofollow noreferrer">docs</a>

blocks|key|3178758|text|这应该与eclipse和m2eclipse无关，并且可以选择更好的支持-+m2e-wtp。此外，您也不需要复制依赖项。以下是几个可能的原因：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3178759|3178760|你应该调用mvn+package+(或者右键点击>+maven+>+<packaging>+)并获得一个war文件-属性(在pom中)必须是默认的依赖项(如果它们是provided或者test，它们不会被包含在归档中)|unordered-list-item|style|CODE|3178761|如果你正在eclipse的服务器上作为动态web项目运行项目，那么你应该打开项目属性(右键单击><packaging>)并选择"Deployment+|3178762|“。点击“添加”，选择“构建路径条目”，然后选择"maven依赖项“。这将指示WTP将maven依赖项发送到服务器目录。|3178763|3178764|entityMap|0|LINK|mutability|MUTABLE|url|http://community.jboss.org/en/tools/blog/2011/09/30/m2eclipse-wtp-0140-new-noteworthy^0|11|7|0|0|0|5|B|Y|B|2A|8|2K|4|0|1C|B|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|-4|5|6|7|10|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|11|8|@$A|12|B|13|H|I]|$A|14|B|15|H|I]|$A|16|B|17|H|I]|$A|18|B|19|H|I]]|9|@]|C|$]]|$1|J|3|K|5|G|7|1A|8|@$A|1B|B|1C|H|I]]|9|@]|C|$]]|$1|L|3|M|5|G|7|1D|8|@]|9|@]|C|$]]|$1|N|3|-4|5|6|7|1E|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|1F|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

This should have nothing to do with eclipse and m2eclipse, and optionally for better support - <a href="http://community.jboss.org/en/tools/blog/2011/09/30/m2eclipse-wtp-0140-new-noteworthy">m2e-wtp</a>. Also, you don't need copy-dependencies. Here are a few possible reasons:

<ul>
<li>you should invoke <code>mvn package</code> (or right-click > maven > package) and obtain a war file - the <code>&lt;packaging&gt;</code> (in the pom) must be <code>war</code></li>
<li>your dependencies should be with the default scope (if they are <code>provided</code> or <code>test</code> they will not be included in the archive)</li>
<li>if you are running the project as dynamic web project on a server within eclipse, then you should open the project properties (right click > properties) and select "Deployment Assembly". There click "add", select "build path entries", and choose "maven dependencies". This will instruct WTP to send the maven dependencies to the server dir.</li>
</ul>

blocks|key|267983|text|首先安装Eclipse+WTP的Eclipse+Maven+Integration+(帮助->Eclipse+Marketplace)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|267984|然后在你的web项目的pom.xml中添加：|267985|++++<packaging>war</packaging>|code-block|syntax|javascript|267986|在此之后，只需右键单击项目Maven+->更新项目，它将自动为您在部署程序集中添加Maven依赖项。|267987|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

First install Maven Integration For Eclipse WTP (Help->Eclipse Marketplace)

Then in your web project's pom.xml just add:

<pre><code> &lt;packaging&gt;war&lt;/packaging&gt;
</code></pre>

After that just right click the project, Maven -> Update Project, which should automagically add Maven Dependencies for you in the Deployment Assembly.

blocks|key|2965021|text|我刚刚做了maven+->更新项目，为我工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2965022|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I just did maven -> update project worked for me.

blocks|key|267992|text|右键单击项目>+Maven+>更新Maven项目>确定为我修复它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|267993|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Right-click project > Maven > Update Maven Project > OK fixed it for me

blocks|key|267995|text|如果您查看您的部署，发现WEB-Inf/lib中没有您的Maven依赖项，那么确保这些Maven依赖项存在于您的部署程序集中是至关重要的，正如所选答案中所提到的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|267996|但是，要小心Eclipse，即使使用Maven更新，也不要刷新所有内容。如果您进行清理、重新构建和重新部署，但仍然没有看到填充的lib文件夹，请尝试通过Servers>Add和Remove将应用程序删除并重新添加到服务器部署中。|267997|这为我疏通了系统。|267998|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

If you look into your deployment and see that WEB-Inf/lib is empty of your Maven dependencies, then ensuring those Maven dependencies are in your deployment assembly is crucial as mention in the chosen answer. 

However be wary of Eclipse then not refreshing everything even with a Maven update. If you clean, rebuild and redeploy and still do not see the lib folder being populated try removing and re-adding the application to the server deployments via Servers>Add and Remove. 

This unclogged the system for me.

blocks|key|3178788|text|右键单击项目Maven+Deployment+Assembly:查看其中是否包含->依赖项和所有其他依赖项。如果没有，请右键单击项目->+Maven启用工作区分辨率|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3178789|(也许然后是Maven+->更新项目，但然后再次查看“部署程序集”，看看您得到了什么。)这就解决了这个问题(终于！)对我来说。|3178790|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Right-click project -> Deployment Assembly:
See if you have the Maven Dependencies and all others in there.
If not,
Right-Click project -> Maven -> Enable Workspace Resolution

(maybe then Maven -> Update Project, but then look again into "Deployment Assembly" and see what You've got.)
this solved it (finally!) for me.

blocks|key|268003|text|在Eclipse上，选择您的Web项目->右键单击->属性->部署程序集->添加->+Java+Build+Path+Entries+->+Maven依赖项|type|unstyled|depth|inlineStyleRanges|entityRanges|data|268004|通过这些步骤，maven库将在完全发布时包含在WEB-INF/lib中。|268005|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

On Eclipse, select your Web Project -> right click -> Properties -> Deployment Assembly -> Add -> Java Build Path Entries -> Maven Dependencies

With this steps, maven libraries will be included on WEB-INF/lib when full publish.

I'm having this weird problem making my project Maven-based. I created a new Maven project in Eclipse and enabled the Dynamic Web facets. But during runtime now it throws <code>ClassNotFoundException</code> because the Maven dependencies are not copied to <code>WEB-INF/lib</code> directory. I even tried adding the copy-dependencies section in POM, but it didn't help.

Someone <a href="http://www.coderanch.com/t/488042/tools/maven-web-inf">here</a> seemed to have solved this the right way, but I guess he forgot to mention the solution ::(

Maven dependencies not visible in WEB-INF/lib

服务器

Eclipse

Java

我有一个奇怪的问题，让我的项目基于Maven。我在中创建了一个新的Eclipse 项目，并启用了动态Web。但是在运行时，它抛出了ClassNotFoundException，因为Maven依赖项没有复制到WEB-INF/lib目录。我甚至尝试在POM中添加复制依赖项部分，但没有帮助。某个似乎以正确的方式解决了这个问题...

问Maven依赖项在WEB-INF/lib中不可见
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