使用Java,Eclipse的RESTful Web服务创建教程.Apache Tomcat,无法正常工作

Question

我想在我的电脑上创建并运行一个简单的RESTful应用程序.我在Microsoft Windows Xp操作系统上使用Eclipse Helios IDE上的Java编程语言和Apache Tomcat 7服务器.

我一直在尝试在我的电脑上复制本教程的相同程序(从3到3.4步),但它不起作用.

这是我做的:

• 使用Apache Tomcat 7设置在Eclipse上创建了一个Dynamic项目

• 把我的Jersey和jsr311-api-1.0 jar文件放到项目\WEB-INF\lib\目录中

• 将代码部分从网页复制到我的项目中

• 右键单击该项目,单击"运行方式 - >在服务器上运行"

• 试图达到 http://localhost:8080/de.vogella.jersey.first/rest/hello

但是我看到的是:

为什么不起作用？我做错了什么？为什么？

非常感谢!

编辑:

以下是控制台所说的内容:

25-set-2012 9.35.07 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: C:\Programmi\Java\jdk1.6.0_21\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Programmi/Java/jre6/bin/client;C:/Programmi/Java/jre6/bin;C:/Programmi/Java/jre6/lib/i386;C:\WINDOWS\;C:\WINDOWS\System32;"C:\ApacheMaven\apache-maven-3.0.4\bin";C:\WINDOWS\;C:\WINDOWS\System32;"C:\ApacheMaven\apache-maven-3.0.4\bin";C:\WINDOWS\;C:\WINDOWS\System32;"C:\ApacheMaven\apache-maven-3.0.4\bin";C:\WINDOWS\System32;C:\WINDOWS\;C:\WINDOWS\System32; C:\Programmi\R-Language\R-2.13.1\bin\;C:\Programmi\OpenVPN\bin\; C:\Programmi\Java\jdk1.6.0_21\bin\; "C:\ApacheMaven\apache-maven-3.0.4\bin";;C:\Programmi\eclipseEC;
25-set-2012 9.35.08 org.apache.tomcat.util.digester.SetPropertiesRule begin
AVVERTENZA: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:de.vogella.jersey.first' did not find a matching property.
25-set-2012 9.35.10 org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
25-set-2012 9.35.10 org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
25-set-2012 9.35.10 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 3459 ms
25-set-2012 9.35.10 org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
25-set-2012 9.35.10 org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.6
25-set-2012 9.35.11 org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: urn:com:sun:jersey:api:view is already defined
25-set-2012 9.35.12 org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: urn:com:sun:jersey:api:view is already defined
25-set-2012 9.35.12 org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: urn:com:sun:jersey:api:view is already defined
25-set-2012 9.35.12 org.apache.catalina.core.ApplicationContext log
INFO: Marking servlet Jersey REST Service as unavailable
25-set-2012 9.35.12 org.apache.catalina.core.StandardContext loadOnStartup
GRAVE: Servlet /de.vogella.jersey.first threw load() exception
java.lang.ClassNotFoundException: javax.servlet.Filter
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1488)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1048)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:996)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4741)
    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5062)
    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5057)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
25-set-2012 9.35.12 org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["http-bio-8080"]
25-set-2012 9.35.12 org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
25-set-2012 9.35.12 org.apache.catalina.startup.Catalina start
INFO: Server startup in 1790 ms

也许有些课程失踪了？

Answer 1

要解决您的问题,不使用Maven,您需要将JAX-RS facet添加到项目中.这里发生的是Eclipse没有将正确的lib部署到服务器.可以通过项目的Properties |访问此配置 项目的方面.

说实话,我不知道要添加哪些特定的罐子来使Jersey工作,因为我使用Maven来管理依赖.因此,我已经下载了Jersey软件包,并使用它配置了JAX-RS方面,而不是zip文件.这可以在项目的属性|中看到 部署程序集,其中Jersey的libs已配置为已部署.顺便提一下,您可以手动将已部署的库设置为服务器.

但后来我想起了为什么我使用Maven来管理依赖项.该捆绑包不包含运行Jersey所需的所有内容.它缺少asm jar(存在于zip文件中).所以我不得不将它添加到项目构建路径,并手动重新配置部署组件....

所以,这是Maven,Jersey和Eclipse 的教程.试一试,得出你的结论:)

Answer 2

可能您缺少 servlet-api.jar。在 /WEB-INF/lib 或类路径中添加最新的 jar 并查看它是否有效。