dwr3 抛错

Question

Allocate exception for servlet dwr
org.xml.sax.SAXException: Failed to resolve: arg0=-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN arg1=http://getahead.org/dwr/dwr30.dtd
at org.directwebremoting.impl.DTDEntityResolver.resolveEntity(DTDEntityResolver.java:59)
at com.sun.org.apache.xerces.internal.util.EntityResolverWrapper.resolveEntity(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.resolveEntity(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
at org.directwebremoting.impl.DwrXmlConfigurator.setInputStream(DwrXmlConfigurator.java:132)
at org.directwebremoting.impl.DwrXmlConfigurator.setServletResourceName(DwrXmlConfigurator.java:87)
at org.directwebremoting.impl.ContainerUtil.configureFromDefaultDwrXml(ContainerUtil.java:238)
at org.directwebremoting.impl.ContainerUtil.configureContainerFully(ContainerUtil.java:396)
at org.directwebremoting.servlet.DwrServlet.init(DwrServlet.java:77)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Unknown Source)web.xml <servlet>
  <servlet-name>dwr</servlet-name>
  <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
  <init-param>
   <param-name>debug</param-name>
   <param-value>false</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>dwr</servlet-name>
  <url-pattern>/dwr/*</url-pattern>
 </servlet-mapping>
 dwr.xml<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN" "http://getahead.org/dwr/dwr30.dtd">
<dwr>
<allow>
           省略
</allow>
</dwr>弄了一天了，还是不行，请教各位这个错误怎么解决？

Answer 1

在dwr网站下了个例子（dwr3的），在web.xml中配置了个listener
  <listener>
    <listener-class>org.directwebremoting.servlet.DwrListener</listener-class>
  </listener>不知道是不是这个原因，没用过3，

Answer 2

<servlet-name>dwr</servlet-name>
  <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
  <init-param>
   <param-name>debug</param-name>
   <param-value>false</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>把这里的false 改为 true

Answer 3

把dwr.xml 中
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN" "http://getahead.org/dwr/dwr30.dtd">
去掉
LZ 可以试试
我是这样成功的

Answer 4

在drw.xml中 申明的 dwr30.dtd 改为dwr3.0就行啦 呵呵

Answer 5

在drw.xml中 申明的 dwr30.dtd 改为dwr3.0.dtd就行啦
主要是错误的地址让其找不到所致。
所以请大家注意细节啊 呵呵