我是新來的球衣和網絡服務,我嘗試運行一個簡單的RESTful Web服務。我遵循http://www.mkyong.com/webservices/jax-rs/jersey-hello-world-example/,但我的項目沒有使用maven,我下載了jersey.1.17.1.jar並將其包含到我的項目路徑中。不知道爲什麼:ResourceConfig實例不包含任何根資源類
當我想打電話http://localhost:8080/sycotext/rest/service/SOMETEXT
的服務,我得到這個錯誤:
HTTP Status 500 - Servlet.init() for servlet sycoText-servlet threw exception
這是堆棧跟蹤:
javax.servlet.ServletException: Servlet.init() for servlet sycoText-servlet threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:76)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:934)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:515)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1010)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1618)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1576)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:724)
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.<init>(RootResourceUriRules.java:99)
com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1331)
com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:168)
com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:774)
com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:770)
com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193)
com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:770)
com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:765)
com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:489)
com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:319)
com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605)
com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210)
com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:374)
com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:557)
javax.servlet.GenericServlet.init(GenericServlet.java:160)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:76)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:934)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:515)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1010)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1618)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1576)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:724)
這裏是我的代碼:
package ir.sycotech.text.server.service;
import javax.ws.rs.*;
import javax.ws.rs.core.Response;
@Path("/service")
public class SycoTextService {
@GET
@Path("/{param}")
public Response getMsg(@PathParam("param") String msg) {
String output = "Jersey say : " + msg;
return Response.status(200).entity(output).build();
}
這裏是我的web.xml:
<?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>Restful Web Application</display-name>
<servlet>
<servlet-name>sycoText-servlet</servlet-name>
<servlet-class>
com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>ir.sycotech.text.server.service</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>sycoText-servlet</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
</web-app>
我已經在web.xml文件中正確指定我的包名,我不知道爲什麼我得到這個錯誤,我會如果有人知道這是什麼問題可以真正體會
可能init()方法丟失。 – Ved
你能解釋一下嗎? –
乾淨的Apache Tomcat將工作... –