我正在重新編寫一個我已經創建的web服務，以便我可以用git爲將要接管的我的組的其他成員創建一個「how-to」該項目。爲servlet Jersey REST服務分配異常
這一次，我嘗試使用我的webservice時開始出現錯誤，我似乎無法找到問題，因爲代碼看起來與我以前編寫的代碼（工作代碼）完全相同。
我使用apache tomcat和Jersey與JSON。
以下是錯誤：
mai 14, 2015 6:08:02 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Allocate exception for servlet Jersey REST Service com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. at com.sun.jersey.server.impl.application.RootResourceUriRules.<init>(RootResourceUriRules.java:99) at com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1359) at com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:180) at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:799) at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:795) at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795) at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790) at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:509) at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:339) at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605) at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:577) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1213) 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(Unknown Source)
這裏是我的web.xml文件：
<?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" 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>com.labtabdb.rest</display-name>
<welcome-file-list>
<welcome-file>readme.html</welcome-file>
<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>
<servlet>
<servlet-name>Jersey REST Service</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>com.labtabdb.rest</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey REST Service</servlet-name>
<url-pattern>/nxp/*</url-pattern>
</servlet-mapping>
</web-app>
下面是使用@Path註釋類：
//url path for class it's methods/chemin url pour la classe et ses methodes
@Path ("/v1/inventory")
public class V1__inventory
{
@GET //url ending in only /v1/inventory /chemin terminé par /v1/inventory
@Produces(MediaType.APPLICATION_JSON)
public Response errorIfNoQueryParamSpecified() throws Exception
{
return Response
.status(400) //bad request
.entity("Error: Please specify extension and parameter for this search.")
.build();
}
/**
* Method that returns materials filter by material name
* @param material name
* @return Response
* @throws Exception
*/
@Path("/{material_label}")
@GET
@Produces(MediaType.APPLICATION_JSON)
public Response returnMaterial(@PathParam("material_label") String material) throws Exception
{
material = URLDecoder.decode(material, "UTF-8"); //decode URL param
String returnString = null;
JSONArray json;
try
{
json = LabTab_MySQLQuerys
.getMaterialsByName(material);
//if there are no results to the query
if(json.length() == 0)
throw new CustomException("No results returned");
else //otherwise return results
returnString = json.toString();
}
catch(CustomException e)
{
return Response
.status(204)
.entity(e.getMessage())
.build();
}
catch (Exception e)
{
e.printStackTrace();
return Response
.status(500) //internal server error
.entity("Server was not able to process your request")
.build();
}
return Response
.ok(returnString)
.build();
}
我一直在反覆搜索和閱讀相同的文章3天現在nd我還沒有找到解決我的錯誤的解決方案。
所有幫助表示讚賞