Flex与java通信最简单例子（详细说明了各种需要注意的配置）：

Flex与java通信（java查询数据库返回List，Flex调用java展示数据）：

Flex与java通信（java解析xml返回List，Flex调用java展示数据）：

 

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
    
      cities;	// key=proviceId_cityId  value=[disId,disName]	private Map
     
      > disMap;	// key=proviceId_cityId_disId  value=[nodeId,nodeName]	private Map
      
       > 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
       
         getCities() {		if (cities == null) {			return new ArrayList
        
         ();		}		return cities;	}	public void setCities(List
         
           cities) { this.cities = cities; } public Map
          
           > getDisMap() { if (disMap == null) { return new HashMap
           
            >(); } return disMap; } public void setDisMap(Map
            
             > disMap) { this.disMap = disMap; } public Map
             
              > getNodeMap() { if (nodeMap == null) { return new HashMap
              
               >(); } return nodeMap; } public void setNodeMap(Map
               
                > 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
    
      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
     
       list = new ArrayList
      
       ();		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
       
         nodes = root.selectNodes("/root/pnode/province");			Iterator iter = nodes.iterator();			while (iter.hasNext()) {				UserNode provinceInfo = new UserNode();								Map
        
         > disMap = new HashMap
         
          >(); Map
          
           > nodeMap = new HashMap
           
            >(); 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
            
              cityList = new ArrayList
             
              (); List
              
                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
               
                 disList = new ArrayList
                
                 (); String disKey = provinceId + "_" + cityId; List
                 
                   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
                  
                    nodeList = new ArrayList
                   
                    (); String nodeKey = provinceId + "_" + cityId + "_" + disNodeId; List
                    
                      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：

    
        
             
          
         
             
          
         
                
                      
       tobaccoTrans.dao.impl.UserNodeImpl         
            
      	
    

 

4、Flex项目中mxml应用程序的写法

注意：

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5、绑定好，运行mxml应用程序即可看到数据。