Android XML parsing Magic XStream VI: Transforming a collection list into an XML document

Preface: For XStream do not understand, please see:

Android XMl parsing Magic XStream: Parse aa.xml file under Asset folder in Android project

Android XML parsing Magic XStream II: Converting objects to XML

Android XML parsing Magic XStream Three: Transforming complex objects into XML

Android XML parsing Magic XStream Four: parsing complex XMl files into objects

Android XML parsing Magic XStream Five: Transforming complex objects into XML and writing XML files to SD cards

1. Create Javabeen

 PackageCom.android10; Public classPerson {String pName;        String PAge;  PublicString Getpname () {returnPName; }     Public voidsetpname (String pName) { This. PName =PName; }     PublicString GetPage () {returnPAge; }     Public voidsetpage (String pAge) { This. PAge =PAge; } }

 PackageCom.android10; Public classProduct {PrivateString name; PrivateString age; Privateperson person ;  PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString getage () {returnAge ; }     Public voidsetage (String age) { This. Age =Age ; }     PublicPerson Getperson () {returnPerson ; }     Public voidSetperson (person person) { This. person =Person ; }}

  COM.ANDROID10;  import   java.util.List;  public  class   Listbean {  root;  public  list<product> Getroot () {    /span>return   root;  public  void  setroot (list< Product> this . Root = root; }}

2. Main methods

 PackageCom.android10;ImportJava.io.ByteArrayInputStream;ImportJava.io.ByteArrayOutputStream;Importjava.util.ArrayList;Importjava.util.List;ImportJavax.xml.transform.OutputKeys;ImportJavax.xml.transform.Source;ImportJavax.xml.transform.Transformer;ImportJavax.xml.transform.sax.SAXSource;Importjavax.xml.transform.sax.SAXTransformerFactory;ImportJavax.xml.transform.stream.StreamResult;ImportOrg.xml.sax.InputSource;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportCom.thoughtworks.xstream.XStream; Public classMainactivityextendsActivity {@Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); XStream XStream=NewXStream (); List<Product> root =getList (); //sets an empty element in the collection in Listbean, that is, the collection element label is not displayedXstream.addimplicitcollection (Listbean.class, "Root"); Xstream.autodetectannotations (true); //Setting AliasesXstream.alias ("Product", product.class ); //set name to the property of the element of the parent class (Student)Xstream.useattributefor (Product.class, "name" ); //Convert list collection to XML stringString xmlstring =Xstream.toxml (root); //writes an XML string to an SD card XML fileXstreamutil Xstreamutil =NewXstreamutil (); Xstreamutil.writetoxml ( This, xmlstring); //Convert an XML string into a list collectionlist<product> list =NewArraylist<product>() ; List= (list<product>) Xstream.fromxml (xmlstring); System.out.println ("SSS" +Formatxml (xmlstring)); }    /*** Get Data *@return     */    PrivateList<product>getList () {person Person1=NewPerson (); Person1.setpname ("Saliy" ) ; Person1.setpage ("36" ); Product Product1=NewProduct (); Product1.setname ("Jhon" ) ; Product1.setage ("30" );        Product1.setperson (Person1); Person Person2=NewPerson (); Person2.setpname ("Saliy02" ) ; Person2.setpage ("3602" ); Product Product2=NewProduct (); Product2.setname ("Jhon02" ) ; Product2.setage ("3002" );        Product2.setperson (Person2); List<Product> root =NewArraylist<product>() ;        Root.add (PRODUCT1);        Root.add (PRODUCT2); returnRoot; }    /*** Format XML string *@paramXML *@return     */     Public Staticstring Formatxml (String xml) {Try{Transformer Serializer=saxtransformerfactory.newinstance (). Newtransformer (); Serializer.setoutputproperty (Outputkeys.indent,"Yes"); Serializer.setoutputproperty ("{Http://xml.apache.org/xslt}indent-amount", "2"); Source Xmlsource=NewSAXSource (NewInputSource (NewBytearrayinputstream (Xml.getbytes ())); Streamresult Res=NewStreamresult (NewBytearrayoutputstream ());            Serializer.transform (Xmlsource, RES); return NewString ((bytearrayoutputstream) Res.getoutputstream ()). Tobytearray ()); }Catch(Exception e) {returnXML; }    }}

 PackageCom.android10;ImportJava.io.File;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException;ImportJava.io.OutputStreamWriter;ImportAndroid.content.Context;Importandroid.os.Environment; Public classXstreamutil {xcallback xcallback; /*** Write XML string to SD card file *@paramContext *@paramstr XML string*/     Public voidWritetoxml (context context, String str) {//Get file pathString Sdpath = environment.getexternalstoragedirectory () + "/myfile1.xml/" ; //Create a fileFile File =NewFile (Sdpath); if( !file.exists ()) {            Try{file.createnewfile (); } Catch(IOException e) {e.printstacktrace (); }         }        //Write Data        Try{FileOutputStream out=Newfileoutputstream (file); OutputStreamWriter OUTW=NewOutputStreamWriter (out); Try{outw.write (str);                  Outw.close ();                  Out.close (); if(Xcallback! =NULL) {xcallback.success (); }            } Catch(IOException e) {if(Xcallback! =NULL) {xcallback.fail (); }            }          } Catch(FileNotFoundException E1) {e1.printstacktrace (); if(Xcallback! =NULL) {xcallback.fail (); }        }    }     //Setting up Listeners    voidSetxstreamlister (Xcallback xcallback) { This. Xcallback =Xcallback; }}Interfacexcallback{/*** Write Success*/    voidsuccess (); /*** Write Failed*/    voidfail (); }

3. Operation Result

<list>
<product name= "Jhon" >
<age>30</age>
<person>
<pAge>36</pAge>
<pName>saliy</pName>
</person>
</product>
<product name= "Jhon02" >
<age>3002</age>
<person>
<pAge>3602</pAge>
<pName>saliy02</pName>
</person>
</product>
</list>

Android XML parsing Magic XStream VI: Transforming a collection list into an XML document