Eclipse+Maven+jetty开发第一个web工程（下篇）
下篇主要讲如何用jetty插件在eclipse环境下运行web工程。一、环境：
windows XP + eclipse3.6 + apache-maven-3.0.3 + jetty-maven-plugin8.0.0.M3
二、步骤：
在《Eclipse+Maven+jetty开发第一个web工程（上篇）》中已经介绍了如何创建web工程，接下来讲如下用jetty插件运行此工程。
1、pom.xml设置如下（注意这时选择的是80端口）
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.zjh.web</groupId>
<artifactId>com.zjh.web.frontend</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>UTF-8</encoding>
</configuration>
<version>2.3.2</version>
</plugin>
<plugin>
<!-- http://wiki.eclipse.org/Jetty/Feature/Jetty_Maven_Plugin -->
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>8.0.0.M3</version>
<configuration>
<stopPort>9966</stopPort>
<stopKey>foo</stopKey>
<scanIntervalSeconds>0</scanIntervalSeconds>
<connectors>
<connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
<port>80</port>
<maxIdleTime>60000</maxIdleTime>
</connector>
</connectors>
<webAppConfig>
<contextPath>/</contextPath>
</webAppConfig>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<configuration>
<outputFileNameMapping>@{artifactId}@.@{extension}@</outputFileNameMapping>
</configuration>
</plugin>
</plugins>
</build>
</project>
2、在src\main\webapp下创建WEB-INF目录，在此目录下创建web.xml文件。内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<web-app
version="2.4"
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">
</web-app>
3、在src\main\webapp下创建名为test.html文件。内容如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>我是测试代码</h1>
</br>我是第二行。
</body>
</html>
4、选中工程，右键选择Run as→Run Configurations….作如下设置。
点击运行。url中输入http://127.0.0.1/test.html。可以看到如下的页面。
三、问题及解决
1、之前运行的时候一直提示org.eclipse.jetty.webapp.WebAppContext找不到这个类，相关错误提示如下：
2013-6-15 19:02:44 org.sonatype.guice.bean.reflect.LoadedClass
警告: Error injecting: org.mortbay.jetty.plugin.JettyRunMojo
java.lang.NoClassDefFoundError: org/eclipse/jetty/webapp/WebAppContext
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getDeclaredConstructors(Unknown Source)
at com.google.inject.spi.InjectionPoint.forConstructorOf(InjectionPoint.java:243)
at com.google.inject.internal.ConstructorBindingImpl.create(ConstructorBindingImpl.java:96)
at com.google.inject.internal.InjectorImpl.createUninitializedBinding(InjectorImpl.java:628)
at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:835)
at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:769)
at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:254)
at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:205)
at com.google.inject.internal.InjectorImpl.getInternalFactory(InjectorImpl.java:843)
at com.google.inject.internal.InjectorImpl.getProviderOrThrow(InjectorImpl.java:957)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:990)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:951)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1003)
at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:47)
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:40)
at com.google.inject.internal.InjectorImpl$4$1.call(InjectorImpl.java:968)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1014)
at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:964)
at com.google.inject.Scopes$1$1.get(Scopes.java:59)
at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:79)
at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:53)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:243)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:235)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:92)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
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.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.webapp.WebAppContext
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
... 47 more
事实上，这个类位于maven库中org\eclipse\jetty\下的jetty-webapp\8.0.0.M3中（注意版本号与jetty-maven-plugin相同）。因此初步判断是jetty-webapp-8.0.0.M3.jar依赖的类找不到。于是把下面的内容加到pom.xml中并进行更新。
<dependencies>
<dependency>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>8.0.0.M3</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.4.3</version>
</dependency>
</dependencies>
再运行时即可。
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