Java 服务器启动时，违规课程告诉我什么？
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What does offending class tell me on server startup?
提问by membersound
I'm having the jee7 web api as dependency. I can start my app on tomcatapplication successfully, but what does the following "offending class" statements tell me? Do I have to take any actions?
我有 jee7 web api 作为依赖项。我可以在tomcat应用程序上成功启动我的应用程序，但是以下“违规类”语句告诉我什么？我必须采取任何行动吗？
Jan 13, 2014 5:47:47 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
Information: validateJarFile(C:\Users\me\Servers\apache-tomcat-7.0.50\wtpwebapps\app\WEB-INF\lib\el-api-2.2.jar) - jar not loaded. See Servlet Spec 3.0, section 10.7.2. Offending class: javax/el/Expression.class
Jan 13, 2014 5:47:47 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
Information: validateJarFile(C:\Users\me\Servers\apache-tomcat-7.0.50\wtpwebapps\app\WEB-INF\lib\javaee-web-api-7.0.jar) - jar not loaded. See Servlet Spec 3.0, section 10.7.2. Offending class: javax/servlet/Servlet.class
pom.xml
pom.xml
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
</dependency>
采纳答案by Sotirios Delimanolis
It seems like you (your Servlet container) are trying to load some classes that have already been loaded. The servlet-apiand el-apishould be provided by the Servlet container.
看起来您（您的 Servlet 容器）正在尝试加载一些已经加载的类。在servlet-api和el-api应该由Servlet容器来提供。
Change your pom.xml to account for that
更改您的 pom.xml 以解决该问题
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
回答by Siva Kameswara Rao Munipalle
I have faced the same issue during a project using Eclipse.
我在使用 Eclipse 的项目中遇到了同样的问题。
Doing below things resolved the issue
做以下事情解决了问题
- Added javax.*.jar to the build path
- Removed the project - gave clean build and add the project and finally published....!!
- 添加了 javax. *.jar 到构建路径
- 删除了项目 - 进行了干净的构建并添加了项目并最终发布....!!
Bingo...!!
答对了...！！
This resolved my issue. Hope this helps.
这解决了我的问题。希望这可以帮助。
Thanks,
谢谢，
mskr.
mskr。
回答by Vijay Bhatt
This is a very common problem for developers who are using Maven as a build tool. when , we include the servlet-api as a project dependency i.e pom.xml like this :
对于使用 Maven 作为构建工具的开发人员来说，这是一个非常常见的问题。时，我们将 servlet-api 作为项目依赖项，即 pom.xml 包含在内，如下所示：
<dependency>
<groupId> javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
add scope as provided in the above dependency as following .
添加上述依赖项中提供的范围，如下所示。
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
回答by joemadeus
I fixed this by using the correct Servlet API version: Tomcat 7.x expects version 3.0.x, not the 3.1.x I'd tried using.
我通过使用正确的 Servlet API 版本解决了这个问题：Tomcat 7.x 需要 3.0.x 版本，而不是我尝试使用的 3.1.x。
