严重:为servlet分配异常< myservlet-name> java.lang.ClassNotFoundException:< myservlet>例外 [英] SEVERE: Allocate exception for servlet <myservlet-name> java.lang.ClassNotFoundException: <myservlet> exception
问题描述
当我使用以下 web.xml
时,我的项目运行正常,我可以通过index.jsp页面看到Hello World。我使用 Netbeans 7.4 和 Apache tomcat 6.0.41
When I use the following web.xml
, my project runs fine and I can see "Hello World" getting displayed via index.jsp page. I am using Netbeans 7.4 and Apache tomcat 6.0.41
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
然而,当我创建自己的servlet并使用以下 web.xml时
,=
However, when I created my own servlet and use the following web.xml
,=
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<servlet>
<servlet-name>TEST_Authenticate</servlet-name>
<servlet-class>restapi.TEST_Authenticate</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TEST_Authenticate</servlet-name>
<url-pattern>/TEST_Authenticate</url-pattern>
</servlet-mapping>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
我最终得到以下信息Apache Tomcat日志中的错误:
I end up getting the following error in the Apache Tomcat Log:
Jul 24, 2014 9:36:14 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet TEST_Authenticate
java.lang.ClassNotFoundException: TEST_Authenticate
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:744)
我检查了以下 post 但仍然收到错误。
I have checked the following post but still getting the errors.
项目结构:
首先删除
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
并将其放入在 pom.xml
中,如果它是Maven项目。
from the web.xml
and put it in your pom.xml
if it is a Maven project.
其次, ClassNotFoundException <在指定位置找不到类时抛出/ code>。在你的情况下,因为你有
Secondly, ClassNotFoundException
is thrown when the class cannot be found in the specified location. In your case, as you have
<servlet-class>restapi.TEST_Authenticate</servlet-class>
所以,我假设你有一个名为 restapi的包
并且您拥有该类 TEST_Authenticate
。
So, I am assuming that you have a package of name restapi
and under which you have the class TEST_Authenticate
.
所以,如果它是Maven项目
你应该有 scr / main / java / yourpackagename / yourClass
如果它是一个简单的web项目那么它应该像 src / yourpackagename / yourClass
。
So, if it is a Maven project
you should have scr/main/java/yourpackagename/yourClass
and if it is a simple web-project then it should be like src/yourpackagename/yourClass
.
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