Tomcat在頁面加載時給出500錯誤

我是新來的tomcat和澤西島，所以希望這不是一個愚蠢的錯誤。每當我試着訪問我的項目位於http://127.0.0.1:8080/first/rest/hello我得到以下錯誤...Tomcat在頁面加載時給出500錯誤

javax.servlet.ServletException: Servlet.init() for servlet Jersey REST Service threw exception 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:269) 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
java.lang.Thread.run(Thread.java:679) 

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(WebApplicationIm pl.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:160) 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:269) 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
java.lang.Thread.run(Thread.java:679)

我有一個Java類，併爲這個項目的web.xml文件。它們有以下幾種......

Hello.java

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 is called if TEXT_PLAIN is request 
@GET 
@Produces(MediaType.TEXT_PLAIN) 
public String sayPlainTextHello() { 
    return "Hello Jersey"; 
} 

// This method is called if XML is request 
@GET 
@Produces(MediaType.TEXT_XML) 
public String sayXMLHello() { 
    return "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>"; 
} 

// This method is called if HTML is request 
@GET 
@Produces(MediaType.TEXT_HTML) 
public String sayHtmlHello() { 
    return "<html> " + "<title>" + "Hello Jersey" + "</title>" 
      + "<body><h1>" + "Hello Jersey" + "</body></h1>" + "</html> "; 
} 

}

的web.xml

3210

我缺少什麼？

編輯：這可能是相關的，我一直在使用下面的教程開始。 http://www.vogella.de/articles/REST/article.html#first

來源

2011-09-15 Skizit

如果你看看這個頁面上的第二個答案，它可以幫助你：http://jersey.576304.n2.nabble.com/The-ResourceConfig- instance-does-not-contain-any-root-resource-classes-td1519918.html –

似乎不起作用。現在就給我一個404。 – Skizit

如何開始的最佳方法是查看經過測試的工作樣品。所以..請參閱以下內容：

的HelloWorld Web應用程序：https://maven.java.net/content/repositories/releases/com/sun/jersey/samples/helloworld-webapp/1.9.1/helloworld-webapp-1.9.1-gf-project.zip

順便一提，該錯誤消息意味着「澤西無法找到任何@Path註解類」。我的選擇將是這個：

<init-param> 
    <param-name>com.sun.jersey.config.property.packages</param-name> 
    <param-value>first</param-value> 
</init-param>

是「第一次」真正的名字，其中「你好」類所在的包？

來源

2011-09-16 00:26:48

我的路徑錯了。謝謝！ – Skizit

在球衣2.x的文檔使用

<init-param> 
    <param-name>jersey.config.server.provider.packages</param-name> 
    <param-value>com.rest.portal</param-value> 
</init-param>

來源

2014-05-03 17:24:36 Aruljothi

Tomcat在頁面加載時給出500錯誤

回答

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