10
Java EEとJetty 8.1用のEclipseをダウンロードしました。非常に単純なサーブレットを実装したいと考えています。Eclipseを使用して単純なサーブレットを作成するにはどうすればよいですか？
java -jar start.jarを使用して起動するとJettyが正常に動作します。私はこれをしたサーブレット開発するに
：Eclipseで
を、私は "新しい動的Webプロジェクト" を選びました。
私は
jetty\lib\servlet-api-3.0.jarをEclipseの "Build Path"に追加しました。そのプロジェクトで、 "新しいサーブレット"、およびサーブレットが生成されたと私はいくつかのコードを追加：
：<?xml version="1.0" encoding="utf-8" ?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <servlet> <servlet-name>My Servlet</servlet-name> <servlet-class>MyServlet.class</servlet-class> </servlet> <servlet-mapping> <servlet-name>My Servlet</servlet-name> <url-pattern>/Servlet</url-pattern> </servlet-mapping>/** * Servlet implementation class MyServlet */ @WebServlet("/MyServlet") public class MyServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); out.println("<html><body><h1>My Servlet</h1></body></html>"); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub } }を私はこの内容で
WebContent\WEB-INF\web.xmlでファイルweb.xmlを作成.class-filesをbuild\classesにコピーしましたプロジェクトを
.war-ファイルとしてエクスポートすると、jetty\webapps\MySite.warになります。- 私は
java -jar start.jarで桟橋を開始し、localhost:8080/MySite/Servletを訪れるが、今、私はこのメッセージが表示されます。Servlet Not Initialized javax.servlet.UnavailableException: Servlet Not Initialized at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:546) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:485) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:483) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:412) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:351) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:451) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:916) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:647) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:233) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:76) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:615) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:45) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) at java.lang.Thread.run(Thread.java:722)
を、私はlocalhost:8080/MySite/を訪問する場合、私は2つのフォルダWEB-INF\とサイズ0 bytesとMETA-INF\の両方を参照してください。
Eclipseの私の.war -exportのように見えません。
Eclipseを使用して単純なサーブレットをJettyにエクスポートするにはどうすればよいですか？
私は今、Eclipse用Jetty WTP pluginをインストールしたが、私はそれを使用してこのサーブレットを実行することはできません。
2012-01-30 10:06:50.322:INFO:oejs.Server:jetty-8.1.0.RC4
2012-01-30 10:06:50.353:INFO:oejdp.ScanningAppProvider:Deployment monitor C:\Users\Jonas\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\webapps at interval 1
2012-01-30 10:06:50.353:INFO:oejdp.ScanningAppProvider:Deployment monitor C:\Users\Jonas\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\contexts at interval 1
2012-01-30 10:06:50.353:INFO:oejd.DeploymentManager:Deployable added: C:\Users\Jonas\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\contexts\MySite.xml
2012-01-30 10:06:50.650:WARN:oejuc.AbstractLifeCycle:FAILED o.e.j.w.WebAppContext{/MySite,file:/C:/Users/Jonas/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/MySite/},C:\Users\Jonas\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0/wtpwebapps/MySite: java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor
java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor
at org.eclipse.jetty.annotations.AnnotationConfiguration.createAnnotationParser(AnnotationConfiguration.java:111)
at org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:73)
at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:428)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1208)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:699)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:454)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:36)
at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:183)
at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:491)
at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:138)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:142)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:53)
at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:604)
at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:535)
at org.eclipse.jetty.util.Scanner.scan(Scanner.java:398)
at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:332)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:118)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:552)
at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:227)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.util.component.AggregateLifeCycle.doStart(AggregateLifeCycle.java:58)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:53)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:91)
at org.eclipse.jetty.server.Server.doStart(Server.java:263)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1214)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1137)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jetty.start.Main.invokeMain(Main.java:457)
at org.eclipse.jetty.start.Main.start(Main.java:600)
at org.eclipse.jetty.start.Main.main(Main.java:82)
Caused by:
java.lang.ClassNotFoundException: org.objectweb.asm.ClassVisitor
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.eclipse.jetty.annotations.AnnotationConfiguration.createAnnotationParser(AnnotationConfiguration.java:111)
at org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:73)
at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:428)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1208)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:699)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:454)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:36)
at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:183)
at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:491)
at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:138)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:142)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:53)
at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:604)
at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:535)
at org.eclipse.jetty.util.Scanner.scan(Scanner.java:398)
at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:332)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:118)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:552)
at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:227)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.util.component.AggregateLifeCycle.doStart(AggregateLifeCycle.java:58)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:53)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:91)
at org.eclipse.jetty.server.Server.doStart(Server.java:263)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1214)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1137)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jetty.start.Main.invokeMain(Main.java:457)
at org.eclipse.jetty.start.Main.start(Main.java:600)
at org.eclipse.jetty.start.Main.main(Main.java:82)
サーブレットクラスの要素を 'MyServlet.class'から' my.package.MyServlet'に変更し、 '@WebServlet'アノテーションをコメントアウトしました。ありがとう。 – Jonas