Java Write/Read XML

Package com.plas.util; Import Java.io.FileWriter; Import java.io.IOException; Import Java.util.HashMap; Import java.util.List; Import Java.util.Map; Import Org.jdom.Attribute; Import org.jdom.Document; Import org.jdom.Element; Import org.jdom.JDOMException; Import Org.jdom.input.SAXBuilder; Import Org.jdom.output.Format; Import Org.jdom.output.XMLOutputter; Import Com.plas.pojo.bean.SysAreacate; Import Com.plas.pojo.bean.SysNewsCate; Import Com.plas.pojo.bean.SysNewsSource; public class Analysisxml {//Specify XML parser, set default parser private Saxbuilder Builder; private document document; private Element roots ; Private String Xmlpath; /** * Initialization Information * @param xmlpath */Public Analysisxml (String xmlpath) {builder = new Saxbuilder (false); try {document = Buil Der.build (Xmlpath); catch (Jdomexception e) {//Todo auto-generated catch block E.printstacktrace ();} catch (IOException e) {/Todo Auto -generated Catch block E.printstacktrace (); }//get the XML document roots = Document.getrootelement ();//Get root element This.xmlpath = xmlpath; Public Analysisxml () {}/** * Delete * @param cateid * @return */public string Delete (String catecode) {Element ele =null; Deletexml (Roots.getchildren ("Cate"), Catecode); SaveXML (); return null; Public String Delete (Long catecode) {Element ele =null; Deletexml (Roots.getchildren ("Cate"), Catecode); SaveXML (); return null; /** * Recursive lookup XML * @param sublist * @param conint * @return * * Public Element recursivexml (List sublist,string catecode) {i F (Catecode.equals ("0")) return roots; if (sublist==null) return null; Element ele = null; for (int i=0;i<sublist.size (); i++) {ele = (Element) sublist.get (i); if (Ele.getattributevalue ("id"). Equals (Catecode ) {return ele;//returns the result set}else{Ele = Recursivexml (Ele.getchildren ("Cate"), Catecode); if (Ele!=null && Ele.getattributevalue ("id"). equals (Catecode)) return ele;//returns the result set} {null; /** * Recursive lookup XML * @param sublist * @param conint * @return * * Public Element recursivenewsxml (List sublist,long cateid) {i F (cateid==0) return roots;if (sublist==null) return null; Element ele = null; for (int i=0;i<sublist.size (); i++) {ele = (Element) sublist.get (i); if (Integer.parseint (Ele.getattributevalue ("id" ) ==cateid) {return ele;//returns the result set}else{Ele = Recursivenewsxml (Ele.getchildren ("Cate"), Cateid); if (Ele!=null && Integer.parseint (Ele.getattributevalue ("id")) ==cateid) return ele;//returning the result set}} returns null; /** * Recursive Lookup Delete * @param sublist * @param cateid * @return/public int deletexml (List sublist,string catecode) {Element E Le = null; for (int i=0;i<sublist.size (); i++) {ele = (Element) sublist.get (i); if (Catecode.equals (Ele.getattributevalue ("id") )) {sublist.remove (i);} else{Int J = deletexml (Ele.getchildren ("Cate"), Catecode); if (j!=0) Ele.getchildren ("Cate"). Remove (j);//return result set}} return 0; public int Deletexml (List sublist,long catecode) {Element ele = null; for (int i=0;i<sublist.size (); i++) {ele = (eleme NT) Sublist.get (i); if (Catecode==integer.parseint (Ele.getattributevalue ("id"))) {sublist.remove (i);} else{Int J = deletexml (Ele.getchildren ("Cate"), Catecode); if (j!=0) Ele.getchildren ("Cate"). Remove (j);//returns result set}} return 0; /** * Change XML content */public void SaveXML () {Format format = Format.getcompactformat (); Format.setencoding ("gb2312");//Set text This Code format.setindent (""),//Set line-wrapping indentation FileWriter writer; Xmloutputter output; try {writer = new FileWriter (xmlpath); output = new Xmloutputter (format); Output.output (document, writer); Writer.close () ; catch (IOException e) {//TODO auto-generated catch block E.printstacktrace ();}} /** * Administrative area settings generate the XML * */Public String getareacate (List list) {list Cate = null for the return page; StringBuffer buffer=new StringBuffer (); for (int i=0;i<list.size (); i++) {if ((sysareacate) list.get (i)). Getfatherid (). Equals ("0")) {cate= Roots.getchildren ("Cate"); } else{Cate=recursivexml (Roots.getchildren ("Cate"), ((sysareacate) list.get (i)). Getcatecode ()). GetChildren ("Cate" ); for (int j=0;cate!=null&&j<cate.size (); j + +) {element ele= (Element) Cate.get (j), buffer. Append (";cate><id> "). Append (Ele.getattributevalue (" id ")). Append (" </id> "). Append (" <name> "). Append ( Ele.getchild ("name"). GetText ()). Append ("</name>"). Append ("<down>"). Append (Ele.getchild ("Down"). GetText ()). Append ("</down>"). Append ("<catecode>"). Append (Ele.getchild ("Catecode"). GetText (). Append ("</catecode>"). Append ("</cate>"); } buffer.append ("</cates>"); return buffer.tostring (); Public String FindByID (long id) {return recursivenewsxml (Roots.getchildren ("Cate"), id). Getchild ("name"). GetText (); public string FindByID (string code) {return Recursivexml (Roots.getchildren ("Cate"), code). Getchild ("name"). GetText () ; Public String Findcode (long id) {return recursivenewsxml (Roots.getchildren ("Cate"), id). Getchild ("code"). GetText (); public string Findcode (string code) {return Recursivexml (Roots.getchildren ("Cate"), code). Getchild ("code"). GetText () ; Public String oneelement (Long ID) {//Element Ele = Recursivexml (roots.getchIldren ("Cate"), id); StringBuffer buffer = new StringBuffer ("<cates><cate>"); Buffer//. Append ("<name>")//. Append (Ele.getchild ("name"). GetText ())//. Append ("</name>")//. Append ( "<id>")//. Append (Ele.getchild ("id"). GetText ())//. Append ("</id>")//. Append ("<website>")//. Append (Ele.getchild ("website"). GetText ())//. Append ("</website>"); Buffer.append ("</cate></cates>"); Return "";} Public Document getdocument (String xmlpath) {builder = new Saxbuilder (false); try {Document = Builder.build (Xmlpath);} catch (Jdomexception e) {//Todo auto-generated catch block E.printstacktrace ();} catch (IOException e) {/Todo auto- Generated catch block E.printstacktrace (); }//gets the XML document return documents; /** * Find an element * @param ID * @return/Public element getoneelement (long id) {return recursivenewsxml (Roots.getchildren (" Cate "), id); Public Element getoneelement (String code) {return Recursivexml (Roots.getchildren ("Cate"), code); } }

When Java class calls:

Delete////////////////////public String deletexml () {List List=selectforfatherid ("0"); if (!list.isempty ()) { for (int i=0;i<list.size (); i++) {Analysisxml analysisxml = new Analysisxml (Servletactioncontext.getrequest (). Getrealpath ("/xmldata") + "//areacate.xml"); Analysisxml.delete (((sysareacate) list.get (i)). Getcatecode ()); } return null; ///////////Save/////////////////////Public String Save (list list) {sysareacate fathercate=null;//Analysisxml.delete ( "086"); Query parent Record if (List.isEmpty ()) {} else{for (int i=0;i<list.size (); i++) {fathercate= (sysareacate) list.get (i); Fathercate.setuptime (New Date ()); Fathercate.setdown (new Long (0)); Fathercate.setcatecode (Fathercate.getcatecode (). toLowerCase ()); Testareacate t = new testareacate (); Fathercate.setcntospell (T.getfullspell (Fathercate.getcatename ())); if (fathercate==null) fathercate.setdepth (new Long (1));//Level directory else{Fathercate.setdown (Fathercate.getdown () +1); Lower directory plus 1 fathercate.setdepth (fathercate.getdepth () +1); Sys.save (fAthercate); } analysisxml analysisxml = new Analysisxml (Servletactioncontext.getrequest (). Getrealpath ("/xmldata") + "// Areacate.xml "); Analysisxml.update (Fathercate.getcatecode (), Fathercate.getcatename (), Fathercate.getcatecode (), Fathercate.getfatherid (), 2); for (int i=0;i<list.size (); i++) {List Newlist=sysareacatedao.findbyfatherid ((sysareacate) list.get (i)). Getcatecode ()); Save (NewList); } return null; }