Question

我在我的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
的src / COM /示例/包/后端
- 资源
  - CategoryResource.java
- BackendServer.java
幅
- WEB-INF
  - 的web.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");
    }
}

CategoryResource.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);
    }
}

的web.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service jetty start并尝试连接ip:8085/backend/rest/category/get_all_categories后，我得到了：

HTTP错误：404

访问 / backend / rest / category / get_all_categories时遇到问题。原因：

未找到

更新在java -DDEBUG -jar start.jar

之后记录

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（所有这些版本已经多年来一直是EOLd）。

整个XML文档对于Jetty 9来说是错误的，从DOCTYPE到类引用，甚至是结构。

<SystemProperty>元素引用了一个未在jetty嵌入中使用的"jetty.home"变量（它仅用于jetty发布，即start.jar）。 jetty-http-spi.jar甚至没有设置或使用此属性。

使用Jetty Context XML Deployable是jetty-deploy.jar提供的一项功能，但com.sun.net.httpserver.HttpServer概念不支持这种可部署，可以是独立的可部署的，也可以是内部{ {1}}配置。

您尝试设置的整个后端服务器战争不能在您开始的WEB-INF/jetty-web.xml上（基本级别不支持该概念）

不幸的是，使用com.sun.net.httpserver.HttpServer技术时几乎没有可用的故障排除方法。几乎只限于记录输出。

日志输出显示什么？

更新：2014年10月7日：

关于日志记录输出，请参阅。

您正在使用Jetty 9.2.3发行版通过命令行启动jetty。

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

这将产生2个不同的服务器。

独立的Jetty 9.2.3分发服务器
com.sun.net.httpserver.HttpServer服务器

这些日志中显示的错误实际上有2个。

首先是......

com.sun.net.httpserver.HttpServer

那是因为你在Jetty 9中使用了Jetty 6技术。该类（实际上是包名称空间）在Jetty 9中不存在。

该类（在Jetty 9中）将被称为org.eclipse.jetty.webapp.WebAppContext，有关详细信息，请参阅Eclipse Jetty文档网站中的Configuring a Specific Web App Deployment。

您必须分析和调整示例XML文件中的大多数内容，以适应自Jetty 6和Jetty 9以来近200个版本的实际情况。在Jetty 6和Jetty 9之间已经过了太多时间来列出已更改的内容。这相当于列出了福特18型和特斯拉型号S之间的差异（这将是一个巨大的列表，基本上意味着“一切”并且无用工作）

另一个错误......

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

表示此服务器无法绑定到端口8080，因为其他服务器已经存在。

这是有道理的，因为您的FAILED ServerConnector@1d402894{HTTP/1.1}{0.0.0.0:8080}: java.net.BindException: Address already in use也在端口8080上（根据您的示例代码）。

不要尝试混合嵌入式码头和BackendServer，你只会撕掉你的头发，试图强迫com.sun.net.httpserver.HttpServer做你想做的事。

请考虑使用直嵌式Jetty + jersey servlet。

在线和StackOverflow中有很多这种技术的例子。

这是我发现的第一个示例代码，其中显示了如何为jersey com.sun.net.httpserver.HttpServer设置ServletHolder以及一些相关的init参数来配置它。 Configuring Jersey + Jetty + JSP

用Jetty启动Jersey应用程序

1 个答案: