参见英文答案 > The ResourceConfig instance does not contain any root resource classes 25个
我知道这个问题在此网站上已有过,但我已从这些页面中获取建议,但尚无法解决问题.当尝试使用Jersey运行Rest Web Service时,我遇到以下错误消息： –
例外
javax.servlet.servletexception: Servlet.init() for servlet Jersey REST Service threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:724)
根本原因
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:1359)
com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:180)
com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:799)
com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:795)
com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193)
com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795)
com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790)
com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:491)
com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:321)
com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605)
com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207)
com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:376)
com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:559)
javax.servlet.GenericServlet.init(GenericServlet.java:160)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:724)
在做了研究之后,我把它简化为3个问题： –
> web.xml中的错误.
>打包项目中没有使用资源.
> .jar文件的问题.
我已经尽可能地编辑了web.xml,并且无处可去.下面是我正在使用的当前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" 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>com.epware.jersey.book</display-name>
<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.epware.jersey.book.resources</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey REST Service</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
</web-app>
我找不到链接包中的任何问题.这可能是错误的地方,但我很难自己找到它.同样,这个代码如下.
// Will map the resource to the URL todos
@Path("/books")
public class BooksResource {
@Context
UriInfo uriInfo;
@Context
Request request;
@GET
@Produces(MediaType.TEXT_XML)
public List<Book> getBooksbrowser() {
List<Book> books = new ArrayList<Book>();
books.addAll( BookDao.instance.getModel().values() );
return books;
}
@GET
@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public List<Book> getBooks() {
List<Book> books = new ArrayList<Book>();
books.addAll( BookDao.instance.getModel().values() );
return books;
}
@GET
@Path("count")
@Produces(MediaType.TEXT_PLAIN)
public String getCount() {
int count = BookDao.instance.getModel().size();
return String.valueOf(count);
}
@POST
@Produces(MediaType.TEXT_HTML)
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
public void newBook(
@FormParam("id") String id,
@FormParam("title") String title,
@FormParam("description") String description,
@FormParam("authorFirst") String authorFirst,
@FormParam("authorSecond") String authorSecond,
@FormParam("publisher") String publisher,
@FormParam("publishDate") String publishDate,
@Context HttpServletResponse servletResponse
) throws IOException {
Book book = new Book(id,title,description,authorFirst,authorSecond,publisher,publishDate);
BookDao.instance.getModel().put(id, book);
System.out.println(BookDao.instance.getModel().toString());
servletResponse.sendRedirect("../create_todo.html");
}
@Path("{book}")
public BookResource getBook(
@PathParam("book") String id) {
return new BookResource(uriInfo, request, id);
}
}
我目前正在使用泽西罐子版本1.18,如下图所示： –
外部链接到图像：http://i.stack.imgur.com/j6tpC.png
非常感谢任何帮助,我现在有限的时间来完成这项工作.
解决方法:
如评论中所述,您的配置正常.但是,显然你改变了资源包.
因此类路径尚未更新.与注释一样,完全清理和重建将更新类路径(已编译和资源)并工作.
