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Java Tomcat错误：根元素后面的文档中的标记必须格式正确

java xml tomcat

Java Tomcat错误：根元素后面的文档中的标记必须格式正确,java,xml,tomcat,Java,Xml,Tomcat,我被这个错误困住了？！我有一个简单的XML文件和一个简单的java文件 我的xml： <web-app xmlns="http://java.sun.com/xml/ns/javaee"> <servlet> <servlet-name>hello</servlet-name> <servlet-class>test.HelloServlet</servlet-class> </servlet>

我被这个错误困住了？！我有一个简单的XML文件和一个简单的java文件

我的xml：

<web-app xmlns="http://java.sun.com/xml/ns/javaee">
<servlet>
    <servlet-name>hello</servlet-name>
    <servlet-class>test.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>hello</servlet-name>
    <url-pattern>/hello/</url-pattern>
</servlet-mapping>
</web-app>
我的xml放在WEB-INF中。 当我执行localhost:8080时，我会得到tomcat页面

有人能帮我吗

Jan 24, 2013 3:48:58 PM org.apache.catalina.startup.ContextConfig parseWebXml
SEVERE: Parse error in application web.xml file at jndi:/localhost/opdracht-les1/WEB-INF/web.xml
org.xml.sax.SAXParseException; systemId: jndi:/localhost/opdracht-les1/WEB-INF/web.xml; lineNumber: 5; columnNumber: 2; The markup in the document following the root element must be well-formed.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$TrailingMiscDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1537)
    at org.apache.catalina.startup.ContextConfig.parseWebXml(ContextConfig.java:1878)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1259)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:369)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5173)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:977)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1655)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Jan 24, 2013 3:48:58 PM org.apache.catalina.startup.ContextConfig parseWebXml
SEVERE: Occurred at line 5 column 2
Jan 24, 2013 3:48:58 PM org.apache.catalina.startup.ContextConfig configureStart
SEVERE: Marking this application unavailable due to previous error(s)
Jan 24, 2013 3:48:58 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error getConfigured
Jan 24, 2013 3:48:58 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/opdracht-les1] startup failed due to previous errors
Jan 24, 2013 3:53:09 PM org.apache.catalina.startup.HostConfig deleteRedeployResources
INFO: Undeploying context [/opdracht-les1]
Jan 24, 2013 3:53:29 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive E:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\opdracht-les1.war
Java servlet的部署描述符需要更多的命名空间声明：

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
听起来您的XML文件与您发布的不完全一样-可能是编码问题？这与我发布的完全一样。此外，我建议您在文档开头使用
明确说明文档编码。好的，我按照SkyDan说的做了，tomcat没有给我一个错误，它只说：1月24日，2013年4:18:52 PM org.apache.catalina.startup.HostConfig deployWAR信息：部署web应用程序存档E:\Program Files\apache Software Foundation\Tomcat 7.0\webapps\opdracht-les1.war当我打开浏览器时，它显示：键入异常报告消息错误实例化servlet类test.HelloServlet说明服务器遇到错误内部错误，使其无法满足此请求。刷新后：键入状态报告消息说明请求的资源不可用。@如果这是另一个问题，请编辑您的问题或打开一个新问题，但如果您在注释中给出“更新”，您可能不会收到答案……而不声明命名空间前缀则是一个真正的问题，应予以纠正，在大多数XML解析器中，根元素后面的文档中的标记必须是格式良好的错误消息，这不是原因。 
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">