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POJersey Tutorials from Basics
 

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    <p>I am using Jersey 1.8 and the tutorials that I am referring are quiet old. Nothing works. I am referring to the tutorial given <a href="http://www.vogella.de/articles/REST/article.html" rel="nofollow">here</a> </p> <p>And get a class not found exception. as per the tutorial I made my Java Class as well as configured my web.xml. It shows me an exception and I am not getting a way to fix this. I would like to have a complete up to date tutorial for Jersey implementation. And if something is better than Jersey for REST implementation please suggest. I have rescently started with REST based web services and would appreciate if you can suggest me where to start from(I am only interested in REST). Below is the code that I wrote and compiled using eclipse.</p> <p>Hello.java</p> <pre><code>import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; @Path("/hello") public class Hello { //This method prints the Plain Text @GET @Produces(MediaType.TEXT_PLAIN) public String sayPlainTextHello() { return "Hello Jersey"; } //This is the XML request output @GET @Produces(MediaType.TEXT_XML) public String sayXMLHello() { return "&lt;?xml version=\"1.0\"?&gt;" + "&lt;hello&gt; Hello Jersey" + "&lt;/hello&gt;"; } //This result is produced if HTML is requested @GET @Produces(MediaType.TEXT_HTML) public String sayHTMLHello() { return "&lt;html&gt; " + "&lt;title&gt;" + "Hello Jersey" + "&lt;/title&gt;" + "&lt;body&gt;&lt;h1&gt;" + "Hello Jersey" + "&lt;/body&gt;&lt;/h1&gt;" + "&lt;/html&gt; "; } } </code></pre> <p>web.xml is as follows</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;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"&gt; &lt;display-name&gt;RESTFullApp&lt;/display-name&gt; &lt;servlet&gt; &lt;servlet-name&gt;JerseyRESTService&lt;/servlet-name&gt; &lt;servlet-class&gt;com.sun.jersey.spi.container.servlet.ServletContainer;&lt;/servlet-class&gt; &lt;init-param&gt; &lt;param-name&gt;com.sun.jersey.config.property.packages&lt;/param-name&gt; &lt;param-value&gt;RESTFullApp&lt;/param-value&gt; &lt;/init-param&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;JerseyRESTService&lt;/servlet-name&gt; &lt;url-pattern&gt;/rest/*&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;!-- &lt;welcome-file-list&gt;--&gt; &lt;!-- &lt;welcome-file&gt;index.html&lt;/welcome-file&gt;--&gt; &lt;!-- &lt;welcome-file&gt;index.htm&lt;/welcome-file&gt;--&gt; &lt;!-- &lt;welcome-file&gt;index.jsp&lt;/welcome-file&gt;--&gt; &lt;!-- &lt;welcome-file&gt;default.html&lt;/welcome-file&gt;--&gt; &lt;!-- &lt;welcome-file&gt;default.htm&lt;/welcome-file&gt;--&gt; &lt;!-- &lt;welcome-file&gt;default.jsp&lt;/welcome-file&gt;--&gt; &lt;!-- &lt;/welcome-file-list&gt;--&gt; &lt;/web-app&gt; </code></pre> <p>Noe the error I get while I try to run is </p> <pre><code>exception javax.servlet.ServletException: Servlet.init() for servlet JerseyRESTService threw exception org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) java.lang.Thread.run(Unknown Source) root cause com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. com.sun.jersey.server.impl.application.RootResourceUriRules.&lt;init&gt;(RootResourceUriRules.java:99) com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1298) com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:169) com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:775) com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:771) com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:771) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:766) com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488) com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318) com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609) com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556) javax.servlet.GenericServlet.init(GenericServlet.java:212) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) java.lang.Thread.run(Unknown Source) </code></pre>
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