树型结构(javascript+css+html)

package tree; import java.io.File; import java.io.IOException; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.*; import org.xml.sax.SAXException; public class MyReadXml { String outHTML = ""; public String readXML(String str){ DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); try{ DocumentBuilder db = dbf.newDocumentBuilder(); File file = new File(str); Document doc = db.parse(file); Element root = doc.getDocumentElement(); travsal(root,-1); }catch(ParserConfigurationException e){ e.printStackTrace(); }catch(SAXException e){ e.printStackTrace(); }catch(IOException e){ e.printStackTrace(); } return outHTML; } public void travsal(Element root,int spacenum){ String spaceHTML=""; for(int i=0;i<spacenum;i++){ spaceHTML += "<img src="+"\"treeimages/ftv2vertline.gif\""+ " align="+"\""+"absmiddle"+"\""+"/>"; } int len =root.getChildNodes().getLength(); String id = root.getAttribute("id"); outHTML += "<div id=" + id +">\n"; outHTML += spaceHTML; if(len<1){ outHTML += "<img src="+"\"treeimages/ftv2lastnode.gif\""+" onclick="+"\"deployorconceal("+id+")\""+ " align="+"\""+"absmiddle"+"\""+"/>\n"; }else{ outHTML += "<img src="+"\"treeimages/ftv2mlastnode.gif\""+" onclick="+"\"deployorconceal("+id+")\""+ " align="+"\""+"absmiddle"+"\""+"/>\n"; } outHTML += "<input name="+"\"chkbox\""+" onclick="+"\"inselected("+id+"),concelchk(event)\""+" type="+"\"checkbox\""+">\n"; String name = root.getAttribute("value"); outHTML += name; int nextspacenum=spacenum+1; for(int i=0;i<len;i++){ Node el1=root.getChildNodes().item(i); if(el1.getNodeName().compareTo("a")==0){ Element elem=(Element)el1; if(elem!=null){ if(elem.getTagName().compareTo("a")==0){ travsal(elem,nextspacenum); } } } } // outHTML += "</div>"; } /* public String getHTML(){ String strHTML = readXML("treexml.xml"); return strHTML; }*/ /* public static void main(String []args){ MyReadXml html = new MyReadXml(); String t = html.readXML("treexml.xml"); System.out.println(t); } */ }