如何用JSP动态解析XML文件，主要是第三层元素如何递归解析出来，，谢谢了！！！

我传了个例子，和我做的解析xml文件的jsp程序。
麻烦各位了，小女子谢过了。
比如说下面的例子：
这个是原来的XML文件
<?xml version="1.0" encoding="UTF-8" ?>
- <repository name="compass-solutions" visible="true" displaytype="icons">
  <title>Compass商业智能平台</title>
  <description>通过创建统一的数据平台，满足自动报表编制需求，为领导经营决策提供辅助支持。</description>
  <icon>getImage?image=icons/folder.png</icon>
  <rollovericon>getImage?image=icons/solutions.png</rollovericon>
  <solution />
- <file type="FILE.URL" visible="true" displaytype="url">
  <filename>Portal.url</filename>
  <title>Portal演示</title>
  <target>pentaho_portal</target>
  <description>Pentaho Portal演示程序包括了所有可获得的例子和一些附加的仪表盘例子。</description>
  <icon>getImage?image=icons/url.png</icon>
  <url>/portal/portal/pentaho/default</url>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="samples" path="" visible="true" displaytype="list">
  <title>应用程序</title>
  <description>一些例子，用来展示Compass BI平台的特性。</description>
  <icon>reporting.png</icon>
  <solution>samples</solution>
- <file type="FILE.ACTIVITY" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" visible="true" displaytype="report">
  <filename>ldcx.xaction</filename>
  <path />
  <solution>samples</solution>
  <title>ldcx</title>
  <description>ldcx</description>
  <author>Cube Designer</author>
  <icon>slicedice.png</icon>
  <properties>subscribable=false</properties>
  </file>
- <file type="FILE.ACTIVITY" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" visible="true" displaytype="report">
  <filename>u.xaction</filename>
  <path />
  <solution>samples</solution>
  <title>u</title>
  <description>u</description>
  <author>Cube Designer</author>
  <icon>slicedice.png</icon>
  <properties>subscribable=false</properties>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="bursting" path="bursting" visible="true" displaytype="list">
  <path>bursting</path>
  <title>5. Bursting例子</title>
  <description>Bursting允许你把一个大任务（例如把报表传输给部门经理）分解成一个简单的、对于每个单独案例都可重复使用的流程。 <br/>The rules that determine the cases, and the processes for creating the content and delivering it can be customized to meet the requirements.</description>
  <icon>getImage?image=icons/burst.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="charts" path="charts" visible="true" displaytype="list">
  <path>charts</path>
  <title>8. 图表例子</title>
  <description>使用多种数据来显示不同的图表例子</description>
  <icon>getImage?image=icons/Charts.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" visible="false" name="chinaUnionPay">
  <path>chinaUnionPay</path>
  <title>chinaUnionPay</title>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="dashboard" path="dashboard" visible="true" displaytype="list">
  <path>dashboard</path>
  <title>仪表盘</title>
  <description />
  <icon>getImage?image=icons/dashboard.jpg</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="datasources" path="datasources" visible="false" displaytype="list">
  <path>datasources</path>
  <title>7. 数据源例子</title>
  <description>从不同OLAP和关系型数据库数据源返回的数据集例子</description>
  <icon>getImage?image=icons/datasources.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="getting-started" path="getting-started" visible="true" displaytype="list">
  <path>getting-started</path>
  <title>1. 入门</title>
  <description>一些例子，用来检查你的Compass BI平台是否安装正确.</description>
  <icon>getImage?image=icons/GettingStarted.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" visible="false" name="index">
  <path>index</path>
  <title>index</title>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" visible="false" name="portal">
  <path>portal</path>
  <title>portal</title>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="printing" path="printing" visible="false" displaytype="list">
  <path>printing</path>
  <title>4. 打印例子</title>
  <description>内容发送到打印机的例子。 Content -> Printer. 尝试一下?</description>
  <icon>getImage?image=icons/printing.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="reporting" path="reporting" visible="true" displaytype="list">
  <path>reporting</path>
  <title>2. 报表例子</title>
  <description>使用Eclipse BIRT和 JasperReports作为报表引擎并生成HTML和PDF报表的例子。</description>
  <icon>getImage?image=icons/reporting.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="services" path="services" visible="false" displaytype="list">
  <path>services</path>
  <title>Web Service例子</title>
  <description>这个例子运行一个web service，并返回一个SOAP相应</description>
  <icon>getImage?image=icons/WebServiceExample.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="svg" path="svg" visible="false" displaytype="list">
  <path>svg</path>
  <title>SVG Examples</title>
  <description>Examples of using SVG to display data graphically</description>
  <icon>getImage?image=icons/svg.png</icon>
  <solution>samples</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" visible="false" name="Widgets">
  <path>Widgets</path>
  <title>Widgets</title>
  </file>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="test" path="" visible="true" displaytype="list">
  <title>测试目录</title>
  <description />
  <icon>getImage?image=icons/reporting.png</icon>
  <solution>test</solution>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="cube" path="cube" visible="true" displaytype="list">
  <path>cube</path>
  <title>多维</title>
  <description />
  <icon>getImage?image=icons/reporting.png</icon>
  <solution>test</solution>
  </file>
- <file type="FILE.FOLDER" aclAdministration="true" aclExecute="true" aclSubscribe="true" aclModifyAcl="true" name="report" path="report" visible="true" displaytype="list">
  <path>report</path>
  <title>报表</title>
  <description />
  <icon>getImage?image=icons/reporting.png</icon>
  <solution>test</solution>
  </file>
  </file>
  </repository>

解决方案 »

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这个是解析后的文件<?xml version="1.0" encoding="GB2312" ?>
- <xmlmenu arrow="images/arrow.right.gif" text-overcolor="white" style="horizontal">
  <menu id="2" url="/portal/portal/pentaho/default" icon="getImage?image=icons/url.png" title="" text="Portal演示" />
- <menu id="3" url="" icon="reporting.png" title="" text="应用程序">
  <menu id="31" url="" icon="slicedice.png" title="ldcx" text="ldcx" />
  <menu id="32" url="" icon="slicedice.png" title="u" text="u" />
  <menu id="33" url="" icon="getImage?image=icons/burst.png" title="" text="5.Bursting例子" />
  <menu id="34" url="" icon="getImage?image=icons/Charts.png" title="" text="8.图表例子" />
  <menu id="35" url="" icon="getImage?image=icons/dashboard.jpg" title="" text="仪表盘" />
  <menu id="36" url="" icon="getImage?image=icons/GettingStarted.png" title="" text="1.入门" />
  <menu id="37" url="" icon="getImage?image=icons/reporting.png" title="" text="2.报表例子" />
  </menu>
- <menu id="4" url="" icon="getImage?image=icons/reporting.png" title="" text="测试目录">
  <menu id="41" url="" icon="getImage?image=icons/reporting.png" title="" text="多维" />
  <menu id="41" url="" icon="getImage?image=icons/reporting.png" title="" text="报表" />
  </menu>
  </xmlmenu>
这个是解析文件，只能解析到第二层，第三层后的元素都不能解析，麻烦各位大哥大姐帮帮忙。
<%@page
language="java"
pageEncoding="GBK"%>
<%@ page import="java.io.*,
    java.util.*,
javax.servlet.ServletException,
javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse,
javax.servlet.http.HttpSession,
javax.xml.parsers.DocumentBuilder,
javax.xml.parsers.DocumentBuilderFactory,
javax.xml.parsers.ParserConfigurationException,org.apache.commons.logging.Log,
org.apache.commons.logging.LogFactory,org.dom4j.Document,
org.dom4j.DocumentException,
org.dom4j.DocumentHelper,
org.dom4j.Element,
org.pentaho.core.session.IPentahoSession,
org.pentaho.core.solution.HttpRequestParameterProvider,
org.pentaho.core.solution.HttpSessionParameterProvider,
org.pentaho.core.system.PentahoSystem,
org.pentaho.core.ui.SimpleUrlFactory,
org.pentaho.core.util.UIUtil,
org.pentaho.messages.util.LocaleHelper,
org.pentaho.ui.component.INavigationComponent,
org.pentaho.ui.component.NavigationComponentFactory,
    org.pentaho.core.repository.ISolutionRepository"
%>
<%!
private static final Log logger = LogFactory.getLog(String.class);
public Log getLogger() {
return logger;
}
private int index = 0;
private String basepath;
%>
<%
        System.out.println("------------START LOAD XML------------");
        long start = java.util.Calendar.getInstance().getTimeInMillis();
response.setCharacterEncoding(LocaleHelper.getSystemEncoding());
response.setContentType("text/xml");

HttpSession httpSession = request.getSession();
IPentahoSession userSession = UIUtil.getPentahoSession( request );
HttpRequestParameterProvider requestParameters = new HttpRequestParameterProvider(request);
HttpSessionParameterProvider sessionParameters = new HttpSessionParameterProvider(userSession);
String baseUrl = PentahoSystem.getApplicationContext().getBaseUrl();

httpSession.setAttribute( "dopentahosplash", "false" );
String hrefUrl = baseUrl; //$NON-NLS-1$
String onClick = ""; //$NON-NLS-1$
String thisUrl = baseUrl + "SelectXML?"; //$NON-NLS-1$
basepath = request.getContextPath();
SimpleUrlFactory urlFactory = new SimpleUrlFactory(thisUrl);
ArrayList messages = new ArrayList();

String solution = request.getParameter("solution"); //$NON-NLS-1$
if(solution==null|| "".equals( solution ) ) { //$NON-NLS-1$
solution = null;
}
String path= request.getParameter( "path" );
if(path ==null || "".equals( path )){
path =null;
} boolean allowBackNavigation = solution != null;
INavigationComponent navigate = NavigationComponentFactory.getNavigationComponent(); navigate.setHrefUrl(hrefUrl);
navigate.setOnClick(onClick);
navigate.setSolutionParamName("solution");
navigate.setPathParamName("path");
navigate.setAllowNavigation(new Boolean(allowBackNavigation));
navigate.setOptions("");
navigate.setUrlFactory(urlFactory);
navigate.setMessages(messages);
navigate.validate( userSession, null );
navigate.setParameterProvider( HttpRequestParameterProvider.SCOPE_REQUEST, requestParameters ); //$NON-NLS-1$
navigate.setParameterProvider( HttpSessionParameterProvider.SCOPE_SESSION, sessionParameters ); //$NON-NLS-1$

String view = request.getParameter("view");//$NON-NLS-1$
if( view != null ) {
if( "default".equals( view ) ) { //$NON-NLS-1$
userSession.removeAttribute( "pentaho-ui-folder-style" ); //$NON-NLS-1$
} else {
userSession.setAttribute( "pentaho-ui-folder-style", view );
navigate.setXsl( "text/html", view ); //$NON-NLS-1$
}
} else {
view = (String) userSession.getAttribute( "pentaho-ui-folder-style" );
if( view != null ) {
navigate.setXsl( "text/html", view ); //$NON-NLS-1$
}
}

Document doc=navigate.getXmlContent();
//查看源xml参数
String viewSource = request.getParameter( "viewSource" ); //$NON-NLS-1$
if("1".equals(viewSource)){
  response.setContentType("text/xml");
  response.getWriter().write(doc.asXML());
  return;
}
Document newdoc=null;
try {
if(solution ==null){
  newdoc = getHomeXml(doc, false);
}else if( solution !=null){
newdoc = getHomeXml(doc, true);
}
} catch (Exception e) {
e.printStackTrace();
}
String content=newdoc.asXML();
long end = java.util.Calendar.getInstance().getTimeInMillis();
//System.out.println("this procedure cost "+(end-start)+" ms");
//System.out.println("------------END LOAD XML------------");
//System.out.println("+XML+"+content);
response.getWriter().write(content);
%>
<%! public Document getHomeXml(Document oldDoc, boolean solutionFlag)
throws Exception {
Document doc = DocumentHelper.createDocument();
Element root = oldDoc.getRootElement();
if (solutionFlag) {
root = (Element) root.selectNodes("file").get(0);
}
Element newroot = doc.addElement("xmlmenu"); if (solutionFlag
|| root.attributeValue("visible").equalsIgnoreCase("true")) {
List elements = root.selectNodes("file", "title",false); Element element = null; for (int i = 0; i < elements.size(); i++) {

String solution = "";
String path = "";
String filename = "";
String url = "";
String id;
String type;
String title;
element = (Element) elements.get(i);
if (element.attributeValue("visible").equalsIgnoreCase("true")) {
Element menu = newroot.addElement("menu");
id = "" + (index++);
type = element.attributeValue("type");
title = element.element("title").getText();
if (element.attributeValue("type").equalsIgnoreCase(
"FILE.ACTIVITY")) {

    solution=element.element("solution").getText();
       filename=element.element("filename").getText();
       path=element.element("path").getText();
url = basepath + "/ViewAction?solution=" + solution
+ "&path=" + path + "&action=" + filename;
} else if (element.attributeValue("type").equalsIgnoreCase(
"FILE.URL")) {
url = element.element("url").getText();
} else if (element.attributeValue("type").equalsIgnoreCase(
"FILE.FOLDER")) {
solution = element.element("solution").getText();
filename = element.attributeValue("name");
path = element.attributeValue("path");
}
menu.addAttribute("id",id);
menu.addAttribute("filename",filename);
menu.addAttribute("type",type);
menu.addAttribute("path",path);
menu.addAttribute("text",title);
menu.addAttribute("url",url);
}
} } return doc;
}
%>
这个是解析文件，只能解析到第二层，第三层后的元素都不能解析，麻烦各位大哥大姐帮帮忙。
<%@page
language="java"
pageEncoding="GBK"%>
<%@ page import="java.io.*,
    java.util.*,
javax.servlet.ServletException,
javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse,
javax.servlet.http.HttpSession,
javax.xml.parsers.DocumentBuilder,
javax.xml.parsers.DocumentBuilderFactory,
javax.xml.parsers.ParserConfigurationException,org.apache.commons.logging.Log,
org.apache.commons.logging.LogFactory,org.dom4j.Document,
org.dom4j.DocumentException,
org.dom4j.DocumentHelper,
org.dom4j.Element,
org.pentaho.core.session.IPentahoSession,
org.pentaho.core.solution.HttpRequestParameterProvider,
org.pentaho.core.solution.HttpSessionParameterProvider,
org.pentaho.core.system.PentahoSystem,
org.pentaho.core.ui.SimpleUrlFactory,
org.pentaho.core.util.UIUtil,
org.pentaho.messages.util.LocaleHelper,
org.pentaho.ui.component.INavigationComponent,
org.pentaho.ui.component.NavigationComponentFactory,
    org.pentaho.core.repository.ISolutionRepository"
%>
<%!
private static final Log logger = LogFactory.getLog(String.class);
public Log getLogger() {
return logger;
}
private int index = 0;
private String basepath;
%>
<%
        System.out.println("------------START LOAD XML------------");
        long start = java.util.Calendar.getInstance().getTimeInMillis();
response.setCharacterEncoding(LocaleHelper.getSystemEncoding());
response.setContentType("text/xml");

HttpSession httpSession = request.getSession();
IPentahoSession userSession = UIUtil.getPentahoSession( request );
HttpRequestParameterProvider requestParameters = new HttpRequestParameterProvider(request);
HttpSessionParameterProvider sessionParameters = new HttpSessionParameterProvider(userSession);
String baseUrl = PentahoSystem.getApplicationContext().getBaseUrl();

httpSession.setAttribute( "dopentahosplash", "false" );
String hrefUrl = baseUrl; //$NON-NLS-1$
String onClick = ""; //$NON-NLS-1$
String thisUrl = baseUrl + "SelectXML?"; //$NON-NLS-1$
basepath = request.getContextPath();
SimpleUrlFactory urlFactory = new SimpleUrlFactory(thisUrl);
ArrayList messages = new ArrayList();

String solution = request.getParameter("solution"); //$NON-NLS-1$
if(solution==null|| "".equals( solution ) ) { //$NON-NLS-1$
solution = null;
}
String path= request.getParameter( "path" );
if(path ==null || "".equals( path )){
path =null;
} boolean allowBackNavigation = solution != null;
INavigationComponent navigate = NavigationComponentFactory.getNavigationComponent(); navigate.setHrefUrl(hrefUrl);
navigate.setOnClick(onClick);
navigate.setSolutionParamName("solution");
navigate.setPathParamName("path");
navigate.setAllowNavigation(new Boolean(allowBackNavigation));
navigate.setOptions("");
navigate.setUrlFactory(urlFactory);
navigate.setMessages(messages);
navigate.validate( userSession, null );
navigate.setParameterProvider( HttpRequestParameterProvider.SCOPE_REQUEST, requestParameters ); //$NON-NLS-1$
navigate.setParameterProvider( HttpSessionParameterProvider.SCOPE_SESSION, sessionParameters ); //$NON-NLS-1$

String view = request.getParameter("view");//$NON-NLS-1$
if( view != null ) {
if( "default".equals( view ) ) { //$NON-NLS-1$
userSession.removeAttribute( "pentaho-ui-folder-style" ); //$NON-NLS-1$
} else {
userSession.setAttribute( "pentaho-ui-folder-style", view );
navigate.setXsl( "text/html", view ); //$NON-NLS-1$
}
} else {
view = (String) userSession.getAttribute( "pentaho-ui-folder-style" );
if( view != null ) {
navigate.setXsl( "text/html", view ); //$NON-NLS-1$
}
}

Document doc=navigate.getXmlContent();
//查看源xml参数
String viewSource = request.getParameter( "viewSource" ); //$NON-NLS-1$
if("1".equals(viewSource)){
  response.setContentType("text/xml");
  response.getWriter().write(doc.asXML());
  return;
}
Document newdoc=null;
try {
if(solution ==null){
  newdoc = getHomeXml(doc, false);
}else if( solution !=null){
newdoc = getHomeXml(doc, true);
}
} catch (Exception e) {
e.printStackTrace();
}
String content=newdoc.asXML();
long end = java.util.Calendar.getInstance().getTimeInMillis();
//System.out.println("this procedure cost "+(end-start)+" ms");
//System.out.println("------------END LOAD XML------------");
//System.out.println("+XML+"+content);
response.getWriter().write(content);
%>
<%! public Document getHomeXml(Document oldDoc, boolean solutionFlag)
throws Exception {
Document doc = DocumentHelper.createDocument();
Element root = oldDoc.getRootElement();
if (solutionFlag) {
root = (Element) root.selectNodes("file").get(0);
}
Element newroot = doc.addElement("xmlmenu"); if (solutionFlag
|| root.attributeValue("visible").equalsIgnoreCase("true")) {
List elements = root.selectNodes("file", "title",false); Element element = null; for (int i = 0; i < elements.size(); i++) {

String solution = "";
String path = "";
String filename = "";
String url = "";
String id;
String type;
String title;
element = (Element) elements.get(i);
if (element.attributeValue("visible").equalsIgnoreCase("true")) {
Element menu = newroot.addElement("menu");
id = "" + (index++);
type = element.attributeValue("type");
title = element.element("title").getText();
if (element.attributeValue("type").equalsIgnoreCase(
"FILE.ACTIVITY")) {

    solution=element.element("solution").getText();
       filename=element.element("filename").getText();
       path=element.element("path").getText();
url = basepath + "/ViewAction?solution=" + solution
+ "&path=" + path + "&action=" + filename;
} else if (element.attributeValue("type").equalsIgnoreCase(
"FILE.URL")) {
url = element.element("url").getText();
} else if (element.attributeValue("type").equalsIgnoreCase(
"FILE.FOLDER")) {
solution = element.element("solution").getText();
filename = element.attributeValue("name");
path = element.attributeValue("path");
}
menu.addAttribute("id",id);
menu.addAttribute("filename",filename);
menu.addAttribute("type",type);
menu.addAttribute("path",path);
menu.addAttribute("text",title);
menu.addAttribute("url",url);
}
} } return doc;
}
%>