Java后台将bean封装成xml，然后将xml转成String，传给前台

public String getInfo(String contactId){
  System.out.println("在Cmd中");
  DataSet ds= contactList.getInfo(contactId);
  DataSet ds2 = contactList.getOthersContactAddr(contactId);
  DataSet ds3 = contactList.getNickName(contactId);
  User userInfo = (User)ds.toListBean(User.class).get(0);
  List<ContactAddr> addrList= new ArrayList<ContactAddr>();
  addrList =ds2.toListBean(ContactAddr.class);
  ContactList contactList=(ContactList)ds3.toListBean(ContactList.class).get(0);
  String birthday=userInfo.getBirthday();
  String yy=null,mm=null,dd=null;
  yy=birthday.substring(0,4);
  mm=birthday.substring(4,6);
  dd=birthday.substring(6);
  String xmlStr=null;
  try {
   DocumentBuilderFactory dFact = DocumentBuilderFactory.newInstance();
   DocumentBuilder build = dFact.newDocumentBuilder();
   Document doc = build.newDocument();
   Element root = doc.createElement("userinfo");
   doc.appendChild(root);
   Element social = doc.createElement("social");
   social.setAttribute("userId",userInfo.getUserId());
   social.setAttribute("userName",userInfo.getUserName());
   social.setAttribute("nickName",contactList.getNickName());
   social.setAttribute("gender", userInfo.getGender());
   social.setAttribute("yy", yy);
   social.setAttribute("mm", mm);
   social.setAttribute("dd", dd);
   root.appendChild(social);
   //System.out.println(addrList.size());
   for(int i=0;i<addrList.size();i++){
    Element social2 = doc.createElement("address");
    social2.setAttribute("addrId",addrList.get(i).getAddrId());
    social2.setAttribute("addrType", addrList.get(i).getDeliveryMode());
    social2.setAttribute("addr", addrList.get(i).getDeliveryAddr());
    social.appendChild(social2); 
   }
   xmlStr = BeanUtil.getDomXml(doc);
   }catch (ParserConfigurationException ex) {  
    System.out.println("Error building document");
   } catch(Exception e){
    e.printStackTrace();
   }
   System.out.println(xmlStr);
   return xmlStr;
  
 }

 

 

 

 

package org.loushang.live.common;

import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.StringWriter;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Node;

public class BeanUtil {
 public static String getDomXml(Node doc) {  
        String xmlStr = null;  
        try {  
         // 以 Document Object Model（DOM）树的形式充当转换 Source 树的持有者  
            DOMSource source = new DOMSource(doc);  
              
            //用来生成XML文件  
           
            // 要生成文件需构造PrintWriter的writer,  
            //DOM中这种方式name的值没有写进去,由于编码的问题  
            //  PrintWriter writerXml = new PrintWriter(new FileOutputStream   ("city-dom.xml"));  
           
            //用OutputStreamWriter加了编码就OK了  
            PrintWriter writerXml = new PrintWriter(new OutputStreamWriter(new FileOutputStream("city-jdom.xml"),"utf-8"));  
            Result resultXml = new StreamResult(writerXml);  
            // 实现此接口的对象包含构建转换结果树所需的信息  
//          Result resultXml = new StreamResult(new FileOutputStream("city-dom.xml"));  
 
            //用来得到XML字符串形式  
            // 一个字符流，可以用其回收在字符串缓冲区中的输出来构造字符串。  
            StringWriter writerStr = new StringWriter();  
            Result resultStr = new StreamResult(writerStr);  
              
            // 此抽象类的实例能够将源树转换为结果树。  
            Transformer transformer = TransformerFactory.newInstance().newTransformer();  
            // 设置编码  
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");  
            // 是否缩进  
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");  
            // 将 XML Source 转换为 Result  
            transformer.transform(source, resultXml);  
            transformer.transform(source, resultStr);  
 
            //获取XML字符串  
            xmlStr = writerStr.getBuffer().toString();  
        } catch (TransformerException e) {  
            e.printStackTrace();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return xmlStr;  
    }  
}