java.lang.ClassNotFoundException

zhangliang7486 2008-11-20 05:06:05

JSP中转到Servlet中出错。
web.xml配置文件如下：



<?xml version="1.0" encoding="UTF-8"?>

<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

	<display-name>

		AfterService

	</display-name>

	<servlet>

		<description>

		</description>

		<display-name>

			EmployeeServlet

		</display-name>

		<servlet-name>

			EmployeeServlet

		</servlet-name>

		<servlet-class>

			employee.EmployeeServlet

		</servlet-class>

	</servlet>

	<servlet>

		<description>

		</description>

		<display-name>

			FixxingServlet

		</display-name>

		<servlet-name>

			FixxingServlet

		</servlet-name>

		<servlet-class>

			fixxing.FixxingServlet

		</servlet-class>

	</servlet>

	<servlet>

		<description>

		</description>

		<display-name>

			LoginServlet

		</display-name>

		<servlet-name>

			LoginServlet

		</servlet-name>

		<servlet-class>

			login.LoginServlet

		</servlet-class>

	</servlet>

	<servlet-mapping>

		<servlet-name>EmployeeServlet</servlet-name>

		<url-pattern>/EmployeeServlet</url-pattern>

	</servlet-mapping>

	<servlet-mapping>

		<servlet-name>FixxingServlet</servlet-name>

		<url-pattern>/FixxingServlet</url-pattern>

	</servlet-mapping>

	<servlet-mapping>

		<servlet-name>LoginServlet</servlet-name>

		<url-pattern>/LoginServlet</url-pattern>

	</servlet-mapping>

	

	<welcome-file-list>

		<welcome-file>index.html</welcome-file>

		<welcome-file>index.htm</welcome-file>

		<welcome-file>index.jsp</welcome-file>

		<welcome-file>default.html</welcome-file>

		<welcome-file>default.htm</welcome-file>

		<welcome-file>default.jsp</welcome-file>

	</welcome-file-list>

	

	<!-- proxool config -->

	<servlet>

		<servlet-name>ServletConfigurator</servlet-name>

		<servlet-class>

			org.logicalcobwebs.proxool.configuration.ServletConfigurator

		</servlet-class>

		<init-param>

			<param-name>xmlFile</param-name>

			<param-value>

				WEB-INF/config/sqlserver_proxool.xml

			</param-value>

		</init-param>

	<load-on-startup>1</load-on-startup>		

	</servlet>

</web-app>

请帮忙看一下是什么原因？
报的错为：



java.lang.ClassNotFoundException: login.LoginServlet

	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1355)

	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1201)

	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1034)

	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:757)

	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:130)

	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)

	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)

	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)

	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)

	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)

	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)

	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)

	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)

	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)

	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)

	at java.lang.Thread.run(Unknown Source)

...全文

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周末简设 2011-03-04

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参考

http://www.cctieba.cc/tiezi.aspx?tieziId=277

zhangliang7486 2008-11-20

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谢了,我已经解决了,只要在eclipse中
选择:
project->build all
应会重新生成,并且编译成功

zhangliang7486 2008-11-20

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没有生成 login.LoginServlet 这个类.那请问一下,怎么让它生成这个类

CH_Accp 2008-11-20

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分析，得出一下可能:
1. login.LoginServlet 这个类访问路径是错的,格式: 包名.类名请确保你的正确性
2. login.LoginServlet 这个类可能没有被编译为 class ，请确保你编译好了。
3. 一般不大可能，那就是类加载器的问题，加载器不能加载你的类。

祝楼主成功。