blocks|key|133155|text|servlet+API+.jar文件不能嵌入到webapp中，因为很明显，容器的类路径中已经有了这些类:它实现了这个jar中包含的接口。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|133156|依赖项应该在你的Maven中的provided作用域中，而不是默认的compile作用域中：|offset|length|style|CODE|133157|<dependency>
++++<groupId>javax.servlet</groupId>
++++<artifactId>javax.servlet-api</artifactId>
++++<version>3.1.0</version>
++++<scope>provided</scope>
</dependency>|code-block|syntax|javascript|133158|entityMap^0|0|F|8|Y|7|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@$D|Q|E|R|F|G]|$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|U|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

The servlet API .jar file must not be embedded inside the webapp since, obviously, the container already has these classes in its classpath: it implements the interfaces contained in this jar.

The dependency should be in the <code>provided</code> scope, rather than the default <code>compile</code> scope, in your Maven pom:

<pre><code>&lt;dependency&gt;
 &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
 &lt;artifactId&gt;javax.servlet-api&lt;/artifactId&gt;
 &lt;version&gt;3.1.0&lt;/version&gt;
 &lt;scope&gt;provided&lt;/scope&gt;
&lt;/dependency&gt;
</code></pre>

blocks|key|351169|text|在以下目录中检查jar文件el-api.jar+:C:\apache-tomcat-7.0.39\lib\el-api.jar如果存在，则应在web应用程序WEB-INF\lib\el-api.jar的此目录中删除jar|type|unstyled|depth|inlineStyleRanges|entityRanges|data|351170|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|$]]

Check Inside the Following Directory for the jar file el-api.jar :C:\apache-tomcat-7.0.39\lib\el-api.jar if it exists then in this directory of your web application WEB-INF\lib\el-api.jar the jar should be removed

blocks|key|133267|text|当您的URL模式错误时，可能会发生此错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|133268|例如：如果您编写了@WebServlet("login")，则会显示此错误。正确的名称是@WebServlet("/login")。|133269|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|$]]

when your URL pattern is wrong, this error may be occurred.

eg. If you wrote @WebServlet("login"), this error will be shown. The correct one is @WebServlet("/login").

blocks|key|133338|text|你可能会发现下面的windows命令行在追踪有问题的jar文件时很有用。它为文件夹中所有jars中的所有类文件创建索引。从部署的应用程序的lib文件夹中执行，然后在index.txt文件中搜索有问题的类。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|133339|for+/r+%25X+in+(*.jar)+do+(echo+%25X+&+jar+-tf+%25X)+>>+index.txt|code-block|syntax|javascript|133340|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You may find the following windows command line useful in tracking down the offending jar file. it creates an index of all the class files in all the jars in the folder. Execute from within the lib folder of your deployed app, then search the index.txt file for the offending class.

<pre><code>for /r %X in (*.jar) do (echo %X &amp; jar -tf %X) &gt;&gt; index.txt
</code></pre>

blocks|key|133386|text|从源web-inf/lib文件夹中删除servlet.jar，因为它在tomcat+lib文件夹中可用，然后它就可以正常工作了|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|133387|entityMap^0|2|B|J|B|16|3|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

Remove <code>servlet.jar</code> from source <code>web-inf/lib</code> folder as it is available in tomcat <code>lib</code> folder then it works fine

blocks|key|351341|text|缺少JAX-WS依赖库“jaxws-rt.jar”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|351342|转到这里，http://jax-ws.java.net/。下载JAX-WS+RI发行版。解压缩并将“jaxws-rt.jar”复制到Tomcat库文件夹“{$TOMCAT}/lib”。重新启动Tomcat。|offset|length|351343|entityMap|0|LINK|mutability|MUTABLE|url|http://jax-ws.java.net/^0|0|5|N|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

The JAX-WS dependency library “jaxws-rt.jar” is missing.

Go here <a href="http://jax-ws.java.net/" rel="nofollow">http://jax-ws.java.net/</a>.
Download JAX-WS RI distribution.
Unzip it and copy “jaxws-rt.jar” to Tomcat library folder “{$TOMCAT}/lib“.
Restart Tomcat.

blocks|key|351401|text|通常，当您看到此消息时，它是良性的。如果上面写着|type|unstyled|depth|inlineStyleRanges|entityRanges|data|351402|INFO:+validateJarFile(/<webapp>/WEB-INF/lib/servlet-api-2.5.jar)+-+jar+not+loaded.+
See+Servlet+Spec+2.3,+section+9.7.2.+Offending+class:+javax/servlet/Servlet.class|code-block|syntax|javascript|351403|这意味着它忽略了servlet-api-2.5.jar，因为tomcat已经有了该jar的内置版本，所以它不会使用您的版本。通常情况下，这不会造成问题。|351404|但是，如果它显示为WEB-INF/lib/my_jar.jar+-+jar+not+loaded...Offending+class:+javax/servlet/Servlet.class|offset|length|style|CODE|351405|然后您可以做的事情(在我的实例中，它是一个阴影jar)是运行|351406|$+mvn依赖关系:树|351407|并发现您对“某物”有一个可传递的依赖关系，该依赖关系依赖于servlet-api或类似的jar+(例如：tomcat-servlet-api-9.0.0)。因此，在您的pom中添加一个排除项，例如：(在我的示例中是tomcat，在您的示例中，可能就是其他答案中提到的那些)：|351408|+<dependency>
++++...
++++<exclusions>
++++++<exclusion>
++++++++<groupId>org.apache.tomcat</groupId>
++++++++<artifactId>tomcat-servlet</artifactId>
++++++</exclusion>
++++</exclusions>+
</dependency>|351409|entityMap^0|0|0|0|9|2E|0|0|0|1G|O|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|11|8|@$K|12|L|13|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|16|8|@$K|17|L|18|M|N]]|9|@]|A|$]]|$1|U|3|V|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|W|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|X|$]]

Typically when you see this message, it is benign.
If it says

<pre><code>INFO: validateJarFile(/&lt;webapp&gt;/WEB-INF/lib/servlet-api-2.5.jar) - jar not loaded. 
See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
</code></pre>

It means it is ignoring your servlet-api-2.5.jar because tomcat already has a built-in version of that jar, so it isn't going to be using yours. Typically this doesn't cause an issue.

If however it says <code>WEB-INF/lib/my_jar.jar - jar not loaded...Offending class: javax/servlet/Servlet.class</code>

then what you can do (in my instance, it's a shaded jar) is run

$ mvn dependency:tree

and discover that you have a transitive dependency on "something" that depends on a jar that is either servlet-api or something like it (ex: <code>tomcat-servlet-api-9.0.0</code>). So add an exclusion to that to your pom, ex: (in my case, tomcat, in your case, probably the ones mentioned in the other answers):

<pre><code> &lt;dependency&gt;
 ...
 &lt;exclusions&gt;
 &lt;exclusion&gt;
 &lt;groupId&gt;org.apache.tomcat&lt;/groupId&gt;
 &lt;artifactId&gt;tomcat-servlet&lt;/artifactId&gt;
 &lt;/exclusion&gt;
 &lt;/exclusions&gt; 
&lt;/dependency&gt;
</code></pre>

blocks|key|133547|text|来自https://stackoverflow.com/a/9941668/778517|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|133548|我做了mvn+dependency:tree，结果是|style|CODE|133549|(...)
[INFO]+%2B-+org.zkoss.zk:zkspring-core:jar:3.2.0:compile
[INFO]+%7C++%2B-+org.springframework:spring-beans:jar:3.0.7.RELEASE:compile
[INFO]+%7C++%2B-+org.springframework:spring-context:jar:3.0.7.RELEASE:compile
[INFO]+%7C++%7C++\-+org.springframework:spring-asm:jar:3.0.7.RELEASE:compile
[INFO]+%7C++%2B-+org.springframework:spring-web:jar:3.0.7.RELEASE:compile
[INFO]+%7C++\-+org.reflections:reflections:jar:0.9.5-RC2:compile
[INFO]+%7C+++++%2B-+com.google.collections:google-collections:jar:1.0:compile
[INFO]+%7C+++++%2B-+ch.qos.logback:logback-classic:jar:0.9.9:runtime
[INFO]+%7C+++++%7C++\-+ch.qos.logback:logback-core:jar:0.9.9:runtime
[INFO]+%7C+++++%2B-+com.google.code.gson:gson:jar:1.4:compile
[INFO]+%7C+++++\-+javax.servlet:servlet-api:jar:2.5:compile
(...)|code-block|syntax|javascript|133550|所以在pom.xml中，zkspring-core我添加了exclusions标记|133551|(...)
+++++++++++++<groupId>org.zkoss.zk</groupId>
+++++++++++++<artifactId>zkspring-core</artifactId>
+++++++++++++<version>3.2.0</version>
%2B++++++++++++<exclusions>
%2B++++++++++++++++<exclusion>
%2B++++++++++++++++<groupId>javax.servlet</groupId>
%2B++++++++++++++++<artifactId>servlet-api</artifactId>
%2B++++++++++++++++</exclusion>
%2B++++++++++++</exclusions>
+++++++++++++</dependency>
(...)|133552|在我运行mvn+dependency:tree和javax.servlet之后:servlet-api:jar:2.5:compile是干净的|133553|(...)
[INFO]+%2B-+org.zkoss.zk:zkspring-core:jar:3.2.0:compile
[INFO]+%7C++%2B-+org.springframework:spring-beans:jar:3.0.7.RELEASE:compile
[INFO]+%7C++%2B-+org.springframework:spring-context:jar:3.0.7.RELEASE:compile
[INFO]+%7C++%7C++\-+org.springframework:spring-asm:jar:3.0.7.RELEASE:compile
[INFO]+%7C++%2B-+org.springframework:spring-web:jar:3.0.7.RELEASE:compile
[INFO]+%7C++\-+org.reflections:reflections:jar:0.9.5-RC2:compile
[INFO]+%7C+++++%2B-+com.google.collections:google-collections:jar:1.0:compile
[INFO]+%7C+++++%2B-+ch.qos.logback:logback-classic:jar:0.9.9:runtime
[INFO]+%7C+++++%7C++\-+ch.qos.logback:logback-core:jar:0.9.9:runtime
[INFO]+%7C+++++\-+com.google.code.gson:gson:jar:1.4:compile
(...)|133554|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/9941668/778517^0|2|16|0|0|3|J|0|0|0|0|4|J|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|6|7|16|8|@$A|17|B|18|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|19|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|1A|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|1B|8|@]|9|@]|C|$K|L]]|$1|Q|3|R|5|6|7|1C|8|@$A|1D|B|1E|F|G]]|9|@]|C|$]]|$1|S|3|T|5|J|7|1F|8|@]|9|@]|C|$K|L]]|$1|U|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

from <a href="https://stackoverflow.com/a/9941668/778517">https://stackoverflow.com/a/9941668/778517</a>
I did <code>mvn dependency:tree</code> and result was
<pre><code>(...)
[INFO] +- org.zkoss.zk:zkspring-core:jar:3.2.0:compile
[INFO] | +- org.springframework:spring-beans:jar:3.0.7.RELEASE:compile
[INFO] | +- org.springframework:spring-context:jar:3.0.7.RELEASE:compile
[INFO] | | \- org.springframework:spring-asm:jar:3.0.7.RELEASE:compile
[INFO] | +- org.springframework:spring-web:jar:3.0.7.RELEASE:compile
[INFO] | \- org.reflections:reflections:jar:0.9.5-RC2:compile
[INFO] | +- com.google.collections:google-collections:jar:1.0:compile
[INFO] | +- ch.qos.logback:logback-classic:jar:0.9.9:runtime
[INFO] | | \- ch.qos.logback:logback-core:jar:0.9.9:runtime
[INFO] | +- com.google.code.gson:gson:jar:1.4:compile
[INFO] | \- javax.servlet:servlet-api:jar:2.5:compile
(...)
</code></pre>
so in pom.xml, zkspring-core I added the exclusions tag
<pre><code>(...)
 &lt;groupId&gt;org.zkoss.zk&lt;/groupId&gt;
 &lt;artifactId&gt;zkspring-core&lt;/artifactId&gt;
 &lt;version&gt;3.2.0&lt;/version&gt;
+ &lt;exclusions&gt;
+ &lt;exclusion&gt;
+ &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
+ &lt;artifactId&gt;servlet-api&lt;/artifactId&gt;
+ &lt;/exclusion&gt;
+ &lt;/exclusions&gt;
 &lt;/dependency&gt;
(...)
</code></pre>
after I ran <code>mvn dependency:tree</code> and javax.servlet:servlet-api:jar:2.5:compile is clean
<pre><code>(...)
[INFO] +- org.zkoss.zk:zkspring-core:jar:3.2.0:compile
[INFO] | +- org.springframework:spring-beans:jar:3.0.7.RELEASE:compile
[INFO] | +- org.springframework:spring-context:jar:3.0.7.RELEASE:compile
[INFO] | | \- org.springframework:spring-asm:jar:3.0.7.RELEASE:compile
[INFO] | +- org.springframework:spring-web:jar:3.0.7.RELEASE:compile
[INFO] | \- org.reflections:reflections:jar:0.9.5-RC2:compile
[INFO] | +- com.google.collections:google-collections:jar:1.0:compile
[INFO] | +- ch.qos.logback:logback-classic:jar:0.9.9:runtime
[INFO] | | \- ch.qos.logback:logback-core:jar:0.9.9:runtime
[INFO] | \- com.google.code.gson:gson:jar:1.4:compile
(...)
</code></pre>

I am running a Maven project which is also a dynamic web project. I have used all Spring libraries in Maven. I created <code>web.xml</code>, but when I start my Tomcat 7 server I am getting the following message:

<pre><code>INFO: validateJarFile(C:\Users\mibvzd0\workspace\.metadata\.plugins\
org.eclipse.wst.server.core\tmp2\wtpwebapps\hapi_hl7\WEB-INF\lib\
servlet-api-2.4.jar) - jar not loaded.
See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
</code></pre>

I tried deleting the servlet from <code>webapp/lib</code>, but it didn't work. Let me know what should be done in my case.

jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在运行一个Maven项目，它也是一个动态web项目。我已经使用了Maven中的所有Spring库。我创建了web.xml，但当我启动Tomcat7服务器时，我收到以下消息：INFO: validateJarFile(C:\Users\mibvzd0\workspace\.metadata\.plugins\org....

问jar未加载。请参阅Servlet规范2.3，第9.7.2节。违规类: javax/servlet/Servlet.class
EN

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问jar未加载。请参阅Servlet规范2.3，第9.7.2节。违规类: javax/servlet/Servlet.classEN

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问jar未加载。请参阅Servlet规范2.3，第9.7.2节。违规类: javax/servlet/Servlet.class
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