ClassNotFoundException,Missing ServletContainerAdaptor - web-services

Question

I am creating one REstfulwebservices project. When ever I am going to run this
project then I am getting this error. ClassNot FoundException...ServletAdaptor
problem.
SEVERE: Servlet /XybuyProject threw load() exception
java.lang.ClassNotFoundException:
com.sun.jersey.server.spi.container.servlet.ServletAdaptor
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1048)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:996)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4834)
at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5155)
at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5150)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
This is Web.xml :
<?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_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>FirstProject</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>index2.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>ServletAdaptor</servlet-name>
<servlet-class>
com.sun.jersey.server.spi.container.servlet.ServletAdaptor
</servlet-class>
<init-param>
<param-name>com.sun.jersy.config.property.packages</param-name>
<param-value>com.xybuy.webservice</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>ServletAdaptor</servlet-name>
<url-pattern>/REST/*</url-pattern>
</servlet-mapping>
</web-app>
can you tel me what is the problem behind it.....

Answer 1

Based on the stacktrace, you seem to be using Tomcat, which is a barebones JSP/Servlet container and not a full fledged Java EE container. Jersey is a JAX-RS implementation which is usually already bundled in fullfledged Java EE application servers such as Glassfish. Perhaps you were reading a Jersey book/tutorial or downloading a sample targeted on Glassfish or another Java EE container and thus it will be assumed that you don't need to install it separately.
However, on Tomcat, Jersey is thus not bundled and you will get ClassNotFoundExceptions on Jersey classes when declaring them in web.xml. You need to download the Jersey JAR file(s) separately and drop them in /WEB-INF/lib folder of the webapp.