java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet 错误
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java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet error
提问by Aniket Thakur
Not sure why am I getting this error. Lots of similar questions here but none have worked for me till now.
不知道为什么我会收到这个错误。这里有很多类似的问题，但到目前为止没有一个对我有用。
My ivy file is
我的常春藤文件是
<ivy-module version="2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ant.apache.org/ivy/schemas/ivy.xsd">
<info
organisation=""
module="knoxWeb"
status="integration">
</info>
<dependencies>
<dependency org="org.springframework" name="spring-core" rev="4.0.3.RELEASE"/>
<dependency org="org.springframework" name="spring-context" rev="4.0.3.RELEASE"/>
<dependency org="org.springframework" name="spring-web" rev="4.0.3.RELEASE"/>
<dependency org="org.springframework" name="spring-webmvc" rev="4.0.3.RELEASE"/>
<dependency org="org.springframework" name="spring-beans" rev="4.0.3.RELEASE"/>
</dependencies>
</ivy-module>
and my web.xml is
我的 web.xml 是
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Knox Web Interface</display-name>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
I have resolved ivy. Still getting the error. Also i can see the Class in my eclipse.
我已经解决了常春藤。仍然收到错误。我也可以在我的日食中看到班级。
I am really stuck at this. Any help or suggestion is appreciated.
我真的被困在这个问题上。任何帮助或建议表示赞赏。
PS : I also tried adding < dependency org="org.springframework" name="spring" rev="2.5.6"/>but ivy does not resolve. I get
PS：我也尝试添加< dependency org="org.springframework" name="spring" rev="2.5.6"/>但常春藤无法解决。我得到
Some projects fail to be resolved
Impossible to resolve dependencies of #TestWebProject;working@BLT430LT3201C
download failed: com.oracle.toplink#toplink;10.1.3!toplink.jar
unresolved dependency: com.oracle#oc4j;1.0: not found
unresolved dependency: com.oracle#toplink-essentials;2.41: not found
unresolved dependency: javax.ejb#ejb;3.0: not found
download failed: com.bea.wlplatform#commonj-twm;1.1!commonj-twm.jar
unresolved dependency: jexcelapi#jxl;2.6.6: not found
download failed: javax.jms#jms;1.1!jms.jar
download failed: javax.faces#jsf-api;1.1!jsf-api.jar
download failed: javax.resource#connector;1.0!connector.jar
Not sure if this has anything to do with above problem. I am searching http://mvnrepository.com/artifact/org.springframeworkfor all dependency info.
不确定这是否与上述问题有关。我正在http://mvnrepository.com/artifact/org.springframework搜索所有依赖信息。
My project structure is
我的项目结构是
WEB-INF/lib directory is empty.
WEB-INF/lib 目录为空。
Source : http://opensourceforgeeks.blogspot.in/2014/05/javalangclassnotfoundexception.html
来源：http: //opensourceforgeeks.blogspot.in/2014/05/javalangclassnotfoundexception.html
采纳答案by Aniket Thakur
Thanks a lot guys for your valuable comments. You are all right. Jar files must be in WEB-INF/lib. Or you can tell Eclipse that it can find the jars in additional location and not just WEB-INF/lib.
非常感谢小伙伴们的宝贵意见。你没事。Jar 文件必须在WEB-INF/lib. 或者您可以告诉 Eclipse 它可以在其他位置找到 jar，而不仅仅是WEB-INF/lib.
How do we do that?
我们怎么做？
- Right click the project and select properties. Now go to Deployment Assembly.
- 右键单击项目并选择属性。现在转到部署程序集。
- Now select Add and select Java build path entries.
- 现在选择添加并选择 Java 构建路径条目。
- Ivy option is automatically populated. Select that.
- 常春藤选项会自动填充。选择那个。
- And you are done.Select Apply and ok. Classnotfound Exception vanishes.
- 大功告成。选择应用，然后确定。Classnotfound 异常消失。
