為什么我在此REST教程上得到404？

Question

我一直在這里關注此REST教程： http : //www.vogella.com/tutorials/REST/article.html

我以前使用過REST，但從未完全使用過，也沒有使用過Tomcat，所以我認為我應該從頭開始，從頭開始。 問題是，在本教程的第6.4步中，我只是得到404。

我的web.xml看起來像這樣：

<?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>de.vogella.jersey.first</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>de.vogella.jersey.first</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>

Tomcat在啟動時似乎已檢測到資源：

09/08/2014 9:35:47 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: .:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
09/08/2014 9:35:47 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:RAGRest' did not find a matching property.
09/08/2014 9:35:47 AM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
09/08/2014 9:35:47 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 337 ms
09/08/2014 9:35:47 AM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
09/08/2014 9:35:47 AM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.41
09/08/2014 9:35:47 AM com.sun.jersey.api.core.PackagesResourceConfig init
INFO: Scanning for root resource and provider classes in the packages:
  de.vogella.jersey.first
09/08/2014 9:35:47 AM com.sun.jersey.api.core.ScanningResourceConfig logClasses
INFO: Root resource classes found:
  class de.vogella.jersey.first.Hello
09/08/2014 9:35:47 AM com.sun.jersey.api.core.ScanningResourceConfig init
INFO: No provider classes found.
09/08/2014 9:35:47 AM com.sun.jersey.server.impl.application.WebApplicationImpl _initiate
INFO: Initiating Jersey application, version 'Jersey: 1.18 11/22/2013 01:21 AM'
09/08/2014 9:35:48 AM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
09/08/2014 9:35:48 AM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
09/08/2014 9:35:48 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/9  config=null
09/08/2014 9:35:48 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 956 ms

並且tomcat已在localhost：8080上啟動並運行，這已通過在瀏覽器中對其進行訪問來證明。 但是當我點擊http://localhost:8080/de.vogella.jersey.first/rest/hello我得到的只是一個404。

我是否遺漏了一些顯而易見的東西？ 我必須...

如果有問題，它將在MacBook Pro的Eclipse Helios中運行tomcat 6。

Answer 1

URL部分“ de.vogella.jersey.first”必須是WAR部署單元的名稱（或特定於Web容器的方法，如jboss-web.xml或Tomcat context.xml ）。

至少對於普通的Web應用程序是這種情況，不知道本教程為什么講顯示名稱。