flex 操作xml

service查询出list组装成为xml

 

public static Document createXMLUsersDocument(String filePath,List<Users_rt> list){//System.out.println("start2");//定义一个xml对象Document xmlDocument = DocumentHelper.createDocument() ;//可以通过OutputFormat来设置//添加xml的根节点Element booksElement = xmlDocument.addElement("users");xmlDocument.setRootElement(booksElement);//添加注释//booksElement.addComment("这是数据库中的users_rt表中的查询全部的数据") ;//向users元素添加user元素for(int i=0;i<list.size();i++){Users_rt users = list.get(i);Element userOne = booksElement.addElement("user");//userOne.addAttribute("version", "1.0");Element userOneId = userOne.addElement("id") ;userOneId.setText(users.getId()+"");Element userOneUsername = userOne.addElement("username") ;userOneUsername.setText(users.getUsername());Element userOnePassword = userOne.addElement("password");userOnePassword.setText(users.getPassword());}System.out.println("xml拼接完成");int ret = -1 ;XMLWriter writer = null ;try {//int indexOfLastSeparator = filePath.lastIndexOf(File.separator);//String directoryStr = filePath.substring(0,indexOfLastSeparator);//File directory = new File(directoryStr);//System.out.println("需要的地址是否存在"+directory.exists());//if(!directory.exists()){//System.out.println(directory);//directory.mkdir();//}//String fileName = filePath.substring(indexOfLastSeparator+1);//File xmlFile = new File(directory,fileName);//System.out.println("xml文档是否存在"+xmlFile.exists());//if(!xmlFile.exists()){//System.out.println(xmlFile);//xmlFile.createNewFile();//}/**** * 默认生成的XML文件排版格式比较乱,可以通过OutputFormat类的createCompactFormat()方法 * 或createPrettyPrint()方法格式化输出 * 默认采用createCompactFormat()方法，显示比较紧凑 * createPrettyPrint(),xml文档格式会变焦美观 *///OutputFormat format = OutputFormat.createPrettyPrint();//format.setEncoding("UTF-8");//System.out.println("format对象"+format);//writer = new XMLWriter(new FileWriter(xmlFile),format);//writer.write(xmlDocument);ret = 0 ;} catch (Exception e) {e.printStackTrace();}finally{if(writer != null){try {writer.close();} catch (Exception e2) {e2.printStackTrace();}}}if(ret == 0){return xmlDocument ;}else{return null ;}}

 

返回到flex的对象需要有限制

public String selectAllList() {System.out.println("start");// TODO Auto-generated method stubList<Users_rt> list = this.users_rtMapper.selectAllList() ;System.out.println("list.size():/t"+list.size());String filePath = "D://xx.xml";//System.out.println("String/t"+filePath);Document xmlDocument = Users_rtServiceImpl.createXMLUsersDocument(filePath, list);//System.out.println(xmlDocument.toString());if(xmlDocument != null){System.out.println("创建成功");}else{System.out.println("创建失败");}return XmlDeal.docToString(xmlDocument);}

 

注意：这里是返回的String，而不是xmldocument对象,

 

 

我的flex的代码如下：

 

<fx:Script><!--[CDATA[import flexunit.utils.ArrayList;import mx.collections.ArrayCollection;import mx.rpc.events.ResultEvent;[Bindable] private var xmllist:ArrayCollection = null;[Bindable] private var users :XML ;private function createUsersList():void{users_rtService.selectAllList();}//接收返回的xml文件private function Handler_selectAllList(event:ResultEvent):void{var xmldata:XML ;users = XML(event.result) ;//users_datagrid.dataProvider = users.children() ;}]]--></fx:Script><fx:Declarations><!-- 将非可视元素（例如服务、值对象）放在此处 --><mx:AMFChannel id="myamf" uri="http://localhost:8080/Hope/messagebroker/amf"/> <mx:ChannelSet id="channelSet" channels="{[myamf]}"/><mx:RemoteObject destination="chartUsersServiceFlex" id="users_rtService" channelSet="{channelSet}" showBusyCursor="true" ><mx:method name="selectAllList" result="Handler_selectAllList(event)" /></mx:RemoteObject></fx:Declarations><s:Panel x="159" y="125" width="757" height="234" title="Users表格"><mx:DataGrid x="0" y="0" id="users_datagrid" width="754" height="153" dataProvider="{users.children()}" contentBackgroundColor="#E2BFBF" editable="false" rowCount="10"><mx:columns><mx:DataGridColumn headerText="ID" dataField="id"/><mx:DataGridColumn headerText="用户名" dataField="username"/><mx:DataGridColumn headerText="密码" dataField="password"/></mx:columns></mx:DataGrid></s:Panel>