用Jetty启动Jersey应用程序

Question

我在Ubuntu服务器VCS中安装了jetty 9服务器。java rest项目的结构：

/opt/jetty/webapps/backend/

• 构建
• conf
• lib
• 库
• 日志
• s rc/com/example/pack/backend
  • 资源
    • CategoryResource.java
    • 网络
      • 网.xml

      BackendServer.java

      import com.sun.jersey.api.container.httpserver.HttpServerFactory;
      import com.sun.jersey.api.core.PackagesResourceConfig;
      import com.sun.net.httpserver.HttpServer;
      
      public class BackendServer {
      
          public static void main(String[] args) throws IOException {
              HttpServer server = HttpServerFactory.create("http://localhost:" + "8080" + "/" + "backend/rest", new PackagesResourceConfig("com.droidbrew.androcommerce.backend.resources"));
              DbManager.getInstance();
              server.start();
      
              System.out.println("Server running");
              System.out.println("Hit return to stop...");
              System.in.read();
              System.out.println("Stopping server");
              server.stop(0);
              System.out.println("Server stopped");
          }
      }
      

      类别资源.java

      Path("/category")
      public class CategoryResource {
      
          @GET
          @Path("/get_all_categories")
          @Produces({MediaType.APPLICATION_JSON})
          public String getAllCategories() throws SQLException {
              List<Category> categoryList = DbManager.getInstance().getBackendCategoryManager().getAllCategories();
              Gson gson = new Gson();
              return gson.toJson(categoryList);
          }
      }
      

      网.xml

      <?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>Jersey</display-name>
        <welcome-file-list>
            <welcome-file>index.html</welcome-file>
        </welcome-file-list>
      
        <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.droidbrew.androcommerce.backend.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>
      

      /opt/jetty/webapps/backend.xml

      <?xml version="1.0"?>
      <!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">
      <Configure class="org.mortbay.jetty.webapp.WebAppContext">
          <Set name="configurationClasses">
                  <Array type="java.lang.String">
                    <Item>org.mortbay.jetty.webapp.WebInfConfiguration</Item>
                    <Item>org.mortbay.jetty.plus.webapp.EnvConfiguration</Item>
                    <Item>org.mortbay.jetty.plus.webapp.Configuration</Item>
                    <Item>org.mortbay.jetty.webapp.JettyWebXmlConfiguration</Item>
                    <Item>org.mortbay.jetty.webapp.TagLibConfiguration</Item>
                  </Array>
          </Set>
          <Set name="contextPath">/</Set>
          <Set name="resourceBase"><SystemProperty name="jetty.home" default="."/>/webapps/backend</Set>
      
          <New id="development" class="org.mortbay.jetty.plus.naming.Resource">
                  <Arg>jdbc/development</Arg>
                  <Arg>
                          <New class="org.postgresql.ds.PGConnectionPoolDataSource">
                                  <Set name="User">user</Set>
                                  <Set name="Password">1111</Set>
                                  <Set name="DatabaseName">development</Set>
                                  <Set name="ServerName">localhost</Set>
                                  <Set name="PortNumber">5432</Set>
                          </New>
                  </Arg>
          </New>
      </Configure>
      

      但是在我开始服务码头启动并尝试连接ip：8085/后端/rest/category/get_all_categories后，我得到：

      HTTP错误:404

      访问/back end/rest/category/get _ all _ categories时出现问题。原因:

      未找到

      在java-DDEBUG-jar start.jar之后更新日志

      sudo java -DDEBUG -jar start.jar
      System Property [DEBUG] has been deprecated! (Use org.eclipse.jetty.LEVEL=DEBUG instead)
      2014-10-06 13:09:09.522:INFO::main: Logging initialized @1090ms
      ShutdownMonitor not in use (port < 0): -1
      2014-10-06 13:09:10.047:INFO:oejs.Server:main: jetty-9.2.3.v20140905
      2014-10-06 13:09:10.073:INFO:oejdp.ScanningAppProvider:main: Deployment monitor [file:/opt/jetty/webapps/] at interval 1
      2014-10-06 13:09:10.096:WARN:oejd.DeploymentManager:main: Unable to reach node goal: started
      java.lang.ClassNotFoundException: org.mortbay.jetty.webapp.WebAppContext
          at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
          at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
          at java.security.AccessController.doPrivileged(Native Method)
          at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
          at org.eclipse.jetty.util.Loader.loadClass(Loader.java:86)
          at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.nodeClass(XmlConfiguration.java:364)
          at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:304)
          at org.eclipse.jetty.xml.XmlConfiguration.configure(XmlConfiguration.java:262)
          at org.eclipse.jetty.deploy.providers.WebAppProvider.createContextHandler(WebAppProvider.java:291)
          at org.eclipse.jetty.deploy.App.getContextHandler(App.java:101)
          at org.eclipse.jetty.deploy.bindings.StandardDeployer.processBinding(StandardDeployer.java:36)
          at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:186)
          at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:498)
          at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:146)
          at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:180)
          at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:64)
          at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:609)
          at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:528)
          at org.eclipse.jetty.util.Scanner.scan(Scanner.java:391)
          at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:313)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:150)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:560)
          at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:235)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
          at org.eclipse.jetty.server.Server.start(Server.java:387)
          at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
          at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
          at org.eclipse.jetty.server.Server.doStart(Server.java:354)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1255)
          at java.security.AccessController.doPrivileged(Native Method)
          at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1174)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:606)
          at org.eclipse.jetty.start.Main.invokeMain(Main.java:310)
          at org.eclipse.jetty.start.Main.start(Main.java:786)
          at org.eclipse.jetty.start.Main.main(Main.java:111)
      2014-10-06 13:09:10.111:WARN:oejuc.AbstractLifeCycle:main: FAILED ServerConnector@1d402894{HTTP/1.1}{0.0.0.0:8080}: java.net.BindException: Address already in use
      java.net.BindException: Address already in use
          at sun.nio.ch.Net.bind0(Native Method)
          at sun.nio.ch.Net.bind(Net.java:444)
          at sun.nio.ch.Net.bind(Net.java:436)
          at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
          at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
          at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:320)
          at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
          at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.server.Server.doStart(Server.java:366)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1255)
          at java.security.AccessController.doPrivileged(Native Method)
          at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1174)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:606)
          at org.eclipse.jetty.start.Main.invokeMain(Main.java:310)
          at org.eclipse.jetty.start.Main.start(Main.java:786)
          at org.eclipse.jetty.start.Main.main(Main.java:111)
      2014-10-06 13:09:10.114:WARN:oejuc.AbstractLifeCycle:main: FAILED org.eclipse.jetty.server.Server@5f281b8c: java.net.BindException: Address already in use
      java.net.BindException: Address already in use
          at sun.nio.ch.Net.bind0(Native Method)
          at sun.nio.ch.Net.bind(Net.java:444)
          at sun.nio.ch.Net.bind(Net.java:436)
          at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
          at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
          at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:320)
          at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
          at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.server.Server.doStart(Server.java:366)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1255)
          at java.security.AccessController.doPrivileged(Native Method)
          at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1174)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:606)
          at org.eclipse.jetty.start.Main.invokeMain(Main.java:310)
          at org.eclipse.jetty.start.Main.start(Main.java:786)
          at org.eclipse.jetty.start.Main.main(Main.java:111)
      java.lang.reflect.InvocationTargetException
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:606)
          at org.eclipse.jetty.start.Main.invokeMain(Main.java:310)
          at org.eclipse.jetty.start.Main.start(Main.java:786)
          at org.eclipse.jetty.start.Main.main(Main.java:111)
      Caused by: java.net.BindException: Address already in use
          at sun.nio.ch.Net.bind0(Native Method)
          at sun.nio.ch.Net.bind(Net.java:444)
          at sun.nio.ch.Net.bind(Net.java:436)
          at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
          at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
          at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:320)
          at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
          at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.server.Server.doStart(Server.java:366)
          at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
          at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1255)
          at java.security.AccessController.doPrivileged(Native Method)
          at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1174)
          ... 7 more
      

Answer 1

您的XML文件引用了旧版本的Jetty。

<Configure class="org.mortbay.jetty.webapp.WebAppContext">

org.mortbay.jetty 命名空间适用于 Jetty 6 或更早版本的 Jetty（所有这些版本都已经存在多年了）。

整个XML文档对于Jetty 9来说都是错误的，从DOCTYPE到类引用，甚至到结构。

使用Jetty上下文XML可部署文件是< code>jetty-deploy.jar提供的一项功能，但是，无论是作为独立的可部署文件，还是作为内部< code > we b-INF/Jetty-WEB . XML 配置，这种可部署文件都不受< code > com . sun . net . http server . http server 概念的支持。

您试图设置的整个后端服务器war不能在com.sun.net.httpserver上。HttpServer是您开始的（在基础级别上不受该概念的支持）

不幸的是，当您使用com.sun.net.httpserver.HttpServer技术时，几乎没有可用的故障排除。

日志记录输出显示什么？

更新日期： 2014， 10月 7：

关于日志输出，让我们看看。

您通过命令行启动jetty，使用jetty 9.2.3发行版。

该行为与您的BackendServer使用com.sun.net.httpserver.HttpServer完全无关。

这将导致2个不同的服务器。

1. 独立 Jetty 9.2.3 分发服务器
2. The com.sun.net.httpserver.HttpServer server

这些日志中显示了两个错误。

首先是。。。

java.lang.ClassNotFoundException: org.mortbay.jetty.webapp.WebAppContext

这是因为您正在为Jetty 9使用Jetty 6技术。这个类(实际上是包名称空间)在Jetty 9中并不存在。

该类(在Jetty 9中)将被称为< code > org . Eclipse . Jetty . webapp . Web App context ，有关详细信息，请参见Eclipse Jetty文档网站中的配置特定的Web App部署。

您必须分析和调整示例XML文件中的大部分内容，以适应自Jetty 6和Jetty 9以来近200个版本的实际情况。Jetty 6与Jetty 9之间的时间太长，无法列出发生了什么变化。这相当于列出福特18型车和特斯拉S型车之间的差异（这将是一个巨大的列表，基本上意味着“一切”，并且毫无用处）

另一个错误...

FAILED ServerConnector@1d402894{HTTP/1.1}{0.0.0.0:8080}: 
java.net.BindException: Address already in use    

意味着此服务器无法绑定到端口 8080，因为其他一些服务器已经存在。

这是有道理的，因为您的后端服务器也在端口8080上（根据您的示例代码）。

不要试图将嵌入式码头和com.sun.net.httpserver.HttpServer混为一谈，你只会试图强迫com.sun.net.httpserver.HttpServer做你想做的事情。

考虑使用直接嵌入式jetty jersey servlet代替。

在线和StackOverflow中都有很多这种技术的例子。

这是我找到的第一个例子，它有示例代码，显示了如何为jersey < code > servlet container 设置< code>ServletHolder以及一些相关的init参数来配置它。配置泽西岛码头JSP