Flex与Java交互(Flex调用java类展示数据)解析xml展示数据

时间：2022-01-04 17:22:56

Flex与java通信最简单例子（详细说明了各种需要注意的配置）：http://blog.csdn.net/u010011052/article/details/9116869

Flex与java通信（java查询数据库返回List，Flex调用java展示数据）：http://blog.csdn.net/u010011052/article/details/9116871

Flex与java通信（java解析xml返回List，Flex调用java展示数据）：http://blog.csdn.net/u010011052/article/details/9127643

这个例子展示的意思是：

java解析xml 并返回一个比较复杂的实体对象集合；

然后Flex调用java类拿到对象集合进行遍历，

并将遍历出来的数据塞到一个新的ArrayCollection中，用DataGrid进行数据的展示。

这里的重点不在java，而是Flex的显示。

1、java项目中（为树状xml设计的实体类）

这个实体类稍显复杂，这样写是为了根节点能对应子节点，可能有更方便的写法，希望大家可以提出好的建议，

package tobaccoTrans.entity;

import java.io.Serializable;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

/**

 * @author DWJ

 */

public class UserNode implements Serializable {

	private String provinceId;

	private String provinceName;

	// key=proviceId  value=[cityid,cityname]

	private List<String[]> cities;

	// key=proviceId_cityId  value=[disId,disName]

	private Map<String, List<String[]>> disMap;

	// key=proviceId_cityId_disId  value=[nodeId,nodeName]

	private Map<String, List<String[]>> nodeMap;

	public String getProvinceId() {

		return provinceId;

	}

	public void setProvinceId(String provinceId) {

		this.provinceId = provinceId;

	}

	public String getProvinceName() {

		return provinceName;

	}

	public void setProvinceName(String provinceName) {

		this.provinceName = provinceName;

	}

	public List<String[]> getCities() {

		if (cities == null) {

			return new ArrayList<String[]>();

		}

		return cities;

	}

	public void setCities(List<String[]> cities) {

		this.cities = cities;

	}

	public Map<String, List<String[]>> getDisMap() {

		if (disMap == null) {

			return new HashMap<String, List<String[]>>();

		}

		return disMap;

	}

	public void setDisMap(Map<String, List<String[]>> disMap) {

		this.disMap = disMap;

	}

	public Map<String, List<String[]>> getNodeMap() {

		if (nodeMap == null) {

			return new HashMap<String, List<String[]>>();

		}

		return nodeMap;

	}

	public void setNodeMap(Map<String, List<String[]>> nodeMap) {

		this.nodeMap = nodeMap;

	}

}

2、java中的xml解析类

package tobaccoTrans.dao.impl;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.Node;

import tobaccoTrans.entity.UserNode;

import tobaccoTrans.util.ReadStream;

/**

 * @author DWJ

 */

public class UserNodeImpl extends ReadStream{

	private Document document = null;

	/**

	 * @param user 用户

	 * @param pwd 密码

	 * @return List<UserNode> 以实体对象为单位的数据集合

	 * @throws DocumentException

	 * 解析xml文件存储到集合中

	 */

	public List getAllNodes(String user,String pwd){

		List<UserNode> list = new ArrayList<UserNode>();

		try {

			String path = "http://10.60.250.116/server/getnode.php?";  //内网地址

//			String path = "http://www.yancao18.com/server/getnode.php?"; //外网地址

			path += "user="+user+"&pwd="+pwd;

			document = this.Read(path.trim());

			Element root = document.getRootElement();

			//获取省份下各节点

			List<Node> nodes = root.selectNodes("/root/pnode/province");

			Iterator iter = nodes.iterator();

			while (iter.hasNext()) {

				UserNode provinceInfo = new UserNode();

				Map<String, List<String[]>> disMap = new HashMap<String, List<String[]>>();

				Map<String, List<String[]>> nodeMap = new HashMap<String, List<String[]>>();

				Element proviceElement = (Element) iter.next();

				String provinceId = proviceElement.elementText("pid");

				String provinceName = proviceElement.elementText("pname");

				provinceInfo.setProvinceId(provinceId);

				provinceInfo.setProvinceName(provinceName);

				//获取城市下各节点

				List<String[]> cityList = new ArrayList<String[]>();

				List<Node> cityNodes = proviceElement.selectNodes("cnode/city");

				Iterator cityIter = cityNodes.iterator();

				while (cityIter.hasNext()) {

					String[] cityInfo = new String[2];

					Element cityElement = (Element) cityIter.next();

					String cityId = cityElement.elementText("cid");

					String cityName = cityElement.elementText("cname");

					cityInfo[0] = cityId;

					cityInfo[1] = cityName;

					//获取区域下各节点

					List<String[]> disList = new ArrayList<String[]>();

					String disKey = provinceId + "_" + cityId;

					List<Node> disNodes = cityElement.selectNodes("znode/zone");

					Iterator disIter = disNodes.iterator();

					while (disIter.hasNext()) {

						String[] disInfo = new String[2];

						Element disElement = (Element) disIter.next();

						String disNodeId = disElement.elementText("zid");

						String disNodeName = disElement.elementText("zname");

						disInfo[0] = disNodeId;

						disInfo[1] = disNodeName;

						//获取各子节点

						List<String[]> nodeList = new ArrayList<String[]>();

						String nodeKey = provinceId + "_" + cityId + "_" + disNodeId;

						List<Node> nodeNodes = disElement.selectNodes("nnode/node");

						Iterator nodeIter = nodeNodes.iterator();

						while (nodeIter.hasNext()) {

							String[] nodeInfo = new String[3];

							Element nodeElement = (Element) nodeIter.next();

							String nodeNodeId = nodeElement.elementText("nid");

							String nodeNodeName = nodeElement.elementText("nname");

							String userId = nodeElement.elementText("userid");

							nodeInfo[0] = nodeNodeId;

							nodeInfo[1] = nodeNodeName;

							nodeInfo[2] = userId;

							nodeList.add(nodeInfo);

						}

						nodeMap.put(nodeKey, nodeList);

						disList.add(disInfo);

					}

					disMap.put(disKey, disList);

					cityList.add(cityInfo);

				}

				provinceInfo.setCities(cityList);

				provinceInfo.setDisMap(disMap);

				provinceInfo.setNodeMap(nodeMap);

				list.add(provinceInfo);

			}

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		return list;

	} 

}

下面是xml解析类继承的一个读取数据流类

package tobaccoTrans.util;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import org.dom4j.Document;

import org.dom4j.io.DOMReader;

/**

 * @author DWJ

 */

public class ReadStream {

	public static Document Read(String str) {

		URL url;

		Document document = null;

		try {

			url = new URL(str);

			HttpURLConnection conn = (HttpURLConnection) url.openConnection();

			conn.setConnectTimeout(6 * 1000);// 设置连接超时

			if (conn.getResponseCode() != 200)throw new RuntimeException("请求rul失败！");

			InputStream inputStream = (InputStream) conn.getInputStream();

			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

			DocumentBuilder db = dbf.newDocumentBuilder();

			org.w3c.dom.Document doc = db.parse(inputStream);

//			org.w3c.dom.Document doc = db.parse(new InputSource(new ByteArrayInputStream(inputStream.getBytes("utf-8"))));

			DOMReader domReader = new DOMReader();

			document = domReader.read((org.w3c.dom.Document) doc);

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		return document;

	}

}

3、remoting-config.xml 配置，更对详细配置请参照：http://blog.csdn.net/u010011052/article/details/9116869

<?xml version="1.0" encoding="UTF-8"?>

<service id="remoting-service" class="flex.messaging.services.RemotingService">

    <adapters>

        <adapter-definition id="java-object" class="flex.messaging.services.remoting.adapters.JavaAdapter" default="true"/>

    </adapters>

    <default-channels>

        <channel ref="my-amf"/>

    </default-channels>

    <destination id="UserNodeImpl">

         <properties>

              <source>tobaccoTrans.dao.impl.UserNodeImpl</source>

         </properties>

    </destination> 

</service>

4、Flex项目中mxml应用程序的写法

<?xml version="1.0" encoding="utf-8"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"

			   xmlns:s="library://ns.adobe.com/flex/spark"

			   xmlns:mx="library://ns.adobe.com/flex/mx"

			   initialize="init()"

			   minWidth="955" minHeight="600">

	<fx:Script>

		<![CDATA[

			import mx.collections.ArrayCollection;

			import mx.events.FlexEvent;

			import mx.rpc.events.FaultEvent;

			import mx.rpc.events.ResultEvent;

			[Bindable]

			protected function init():void

			{

				// TODO Auto-generated method stub

				uni.getAllNodes("zhucheng","zhucheng");

			}

			[Bindable]

			var usernodeList:ArrayCollection = new ArrayCollection();

			var cities:ArrayCollection = new ArrayCollection();

			var newArray:ArrayCollection = new ArrayCollection(); //创建的一

			protected function uni_resultHandler(event:ResultEvent):void

			{

				// TODO Auto-generated method stub

				//获取省份

				usernodeList = event.result as ArrayCollection;

				var usernodeListLength:int = usernodeList.length;

				for(var iusernode:int = 0; iusernode < usernodeListLength; iusernode++){

					var pid:String   = usernodeList[iusernode].provinceId;     //要显示的：省份id

					var pname:String   = usernodeList[iusernode].provinceName; //要显示的：省份name

					newArray.addItem({pid:pid});

					newArray.addItem({pname:pname});

					//获取城市

					cities = usernodeList[iusernode].cities;//iusernode

					var citiesLength:int = cities.length;

					for(var icity:int = 0; icity < citiesLength; icity++){

						//cities[i]下2个子节点

						var cityid:String = cities[icity][0].toString();   //要显示的：城市id

						var cityname:String = cities[icity][1].toString(); //要显示的：城市name

						newArray.addItem({cityid:cityid});

						newArray.addItem({cityname:cityname});

						//获取区域

						var disKey:String = pid + "_" + cityid;

						var dismap:ArrayCollection = new ArrayCollection();

						dismap = usernodeList[iusernode].disMap[disKey];//iusernode

						var dismapLength:int = dismap.length;

						for(var idis:int = 0; idis < dismapLength; idis++){

							//dismap[i]下2个子节点

							var disid:String = dismap[idis][0];   //要显示的：区域id

							var disname:String = dismap[idis][1]; //要显示的：区域name

							newArray.addItem({disid:disid});

							newArray.addItem({disname:disname});

							//获取子节点

							var nodeKey:String = disKey + "_" + disid;

							var nodemap:ArrayCollection = new ArrayCollection();

							nodemap = usernodeList[iusernode].nodeMap[nodeKey];//iusernode

							var nodemapLength:int = nodemap.length;

							for(var inode:int = 0; inode < nodemapLength; inode++){

								//nodemap[i]下3个子节点

								var nodeid:String = nodemap[inode][0];   //要显示的：子节点id

								var nodename:String = nodemap[inode][1]; //要显示的：子节点name

								var userid:String = nodemap[inode][2];   //要显示的：userid

								newArray.addItem({nodeid:nodeid});

								newArray.addItem({nodename:nodename});

								newArray.addItem({userid:userid});

							} //获取子节点结束

						} //获取区域结束

					} //获取城市结束

				} //获取省份结束

			} //uni_resultHandler结束

			[Bindable]

			protected function uni_faultHandler(event:FaultEvent):void

			{

				// TODO Auto-generated method stub

			}

		]]>

	</fx:Script>

	<fx:Declarations>

		<!-- 将非可视元素（例如服务、值对象）放在此处 -->

		<s:RemoteObject id="uni" destination="UserNodeImpl" result="uni_resultHandler(event)" fault="uni_faultHandler(event)" />

	</fx:Declarations>

	<mx:Panel x="16" y="15" width="95%" height="95%" title="展示UserNode数据Panel">

		<mx:DataGrid x="15" y="15" width="92%" height="92%" id="dataGrid"  dataProvider="{newArray}">

			<mx:columns>

				<mx:DataGridColumn headerText="pid" dataField="pid" />

				<mx:DataGridColumn headerText="pname" dataField="pname" />

				<mx:DataGridColumn headerText="cid" dataField="cityid" />

				<mx:DataGridColumn headerText="cname" dataField="cityname" />

				<mx:DataGridColumn headerText="zid" dataField="disid" />

				<mx:DataGridColumn headerText="zname" dataField="disname" />

				<mx:DataGridColumn headerText="nid" dataField="nodeid" />

				<mx:DataGridColumn headerText="nname" dataField="nodename" />

				<mx:DataGridColumn headerText="userid" dataField="userid" />

			</mx:columns>

		</mx:DataGrid>

	</mx:Panel>

</s:Application>

注意：

Flex与Java交互(Flex调用java类展示数据)解析xml展示数据

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Flex与Java交互(Flex调用java类展示数据)解析xml展示数据

5、绑定好，运行mxml应用程序即可看到数据。

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