struts2 xml garbled output , ME ! ! ! Find Great God help solve

Server code as follows

  	  private void outPutXml2(String xml) throws IOException, SAXException, ParserConfigurationException{
  		  HttpServletResponse response = ServletActionContext.getResponse();      
  	      PrintWriter out;
  	      out = response.getWriter();
  	      response.setCharacterEncoding("UTF-8");  
  	      response.setContentType("text/xml;charset=UTF-8");   
  	      response.setHeader("Cache-Control", "no-cache");
  	      out.write(xml);
  	  }
  	  public void getCities() throws Exception {
  		    List citys = this.userService.getCities(this.user);
  		    
  		    
  		  	Document doc = DocumentHelper.createDocument();
  		  	Element rootElmt = DocumentHelper.createElement("result");
  		  	doc.add(rootElmt);
  		  	Element psElmt = DocumentHelper.createElement("cities");
  		  	rootElmt.add(psElmt);
  		  	psElmt.addAttribute("size", String.valueOf(citys.size()));
  		  	for(Object city : citys){
  		  		psElmt.add(new DOMElement("city").addText(String.valueOf(city)));
  		  	}
  		  	
  		  	this.outPutXml2(this.prettyXml(doc).getBuffer().toString());
  		  }
  

There used

response.setContentType("text/xml;charset=UTF-8"); 

response encoding settings , but to the browser, but was changed

  Cache-Control:no-cache
  Content-Length:111
  Content-Type:text/xml;charset=ISO-8859-1
  Date:Sat, 30 Nov 2013 02:09:37 GMT
  Server:Apache-Coyote/1.1
  

struts2 configuration

  		<action name="getCities" class="com.bang.action.XMLAction" method="getCities">
  			<result name="xmlMessage" type="plainText">
  				<param name="charSet">UTF-8</param>
  			</result>
  		</action>
  

explain once again , other direct return jsp page encoding is utf-8, only my direct output xml code was changed to ISO-8859-1, I do not know struts tomcat problem or question . tomcat port encoding scheme which I've configured utf-8, as there is no effect. Online search , no similar problems , I hope the great God who helped me solve enthusiastic , grateful
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plus an encoding filter try
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do not know what your specific needs are ? ? ? Specific to do ah ? ? ?
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specific needs is to do an interface sends a request over the other , I used xml output data to each other   ajax request sent with it ? ? ?
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Is not it manual stitching xml string.
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  	<filter>
  		<filter-name>encodingFilter</filter-name>
  		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  		<init-param>
  			<param-name>encoding</param-name>
  			<param-value>UTF-8</param-value>
  		</init-param>
  	</filter>
  

has spent
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specific needs is to do an interface sends a request over the other , I use xml to each output data
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plus struts in your strut.xml file. i18n.encoding = UTF-8 sentence . . .
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this is a coded request parameters , instead of the corresponding output encoding it
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specific needs is to do an interface sends a request over the other , I used xml output data to each other        ajax request sent with it ? ? ?   What sends the request is not the key , the key is the corresponding garbled , not a request garbled
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# type of change in the value of CODE_PRE_6 # httpheader, you try it , this is my guess . Or not , then it had to wait for a master. . .
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stitching also be output ah
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resolved, Lv , for another way
direct extension struts2 result set StrutsResultSupport:
http://blog.csdn.net/d8111/article/details/2914079