在struts2中添加自定义的result的type类型，只需要两步即可在应用中使用了，首先编写自定义类型的类，然后在struts.xml中进行注册即可，若自定义类型带有重定向性质时，就涉及到参数的传递，可参考ServletActionRedirectResult（org.apache.struts2.dispatcher）类，具体可参阅OGNL、ValueStack相关内容。

package com.csmn.base.action;import java.io.File;import java.io.OutputStream;import java.io.StringWriter;import java.io.UnsupportedEncodingException;import java.util.Arrays;import java.util.Iterator;import java.util.LinkedHashMap;import java.util.List;import java.util.Map;import java.util.Map.Entry;import javax.servlet.RequestDispatcher;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.jsp.PageContext;import org.apache.commons.lang.exception.ExceptionUtils;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.apache.struts2.ServletActionContext;import org.apache.struts2.dispatcher.StrutsResultSupport;import org.apache.struts2.views.util.UrlHelper;import org.xhtmlrenderer.pdf.ITextFontResolver;import org.xhtmlrenderer.pdf.ITextRenderer;import com.lowagie.text.pdf.BaseFont;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.config.entities.ResultConfig;import com.opensymphony.xwork2.util.TextParseUtil;/** * 
 * PdfResult類主要用於-导出到PDF. * 
 * 
 * 創建時間 2013-12-7 - 下午08:05:52 * 
 * 
    
      * 
     
歷史修改記錄
 * 
     
       * 
      
城邑耕夫 2017-02-02 添加动态参数传递（主要用于处理文件名） * 
     
 * 
    
 * 
 * copyright cdthgk 2010-2013, all rights reserved. * 
 *  * @author 車水碼農 * @author cdthgk r&d * @since 1.0 * @version 1.0 */public class PdfResult extends StrutsResultSupport {		private static final long serialVersionUID = -6588129708854890330L;		private static final Log log = LogFactory.getLog(PdfResult.class);	public PdfResult() {				super();		init();	}	public PdfResult(String location) {		super(location);		init();	}	/**	 * Dispatches to the given location. Does its forward via a	 * RequestDispatcher. If the dispatch fails a 404 error will be sent back in	 * the http response.	 * 	 * @param finalLocation	 *            the location to dispatch to.	 * @param invocation	 *            the execution state of the action	 * @throws Exception	 *             if an error occurs. If the dispatch fails the error will go	 *             back via the HTTP request.	 */	public void doExecute(String finalLocation, ActionInvocation invocation)			throws Exception {		log.debug("Forwarding to location " + finalLocation);		PageContext pageContext = ServletActionContext.getPageContext();		if (pageContext != null) {			pageContext.include(finalLocation);		} else {			HttpServletRequest request = ServletActionContext.getRequest();			HttpServletResponse response = ServletActionContext.getResponse();						RequestDispatcher dispatcher = request.getRequestDispatcher(finalLocation);			// if the view doesn't exist, let's do a 404			if (dispatcher == null) {				response.sendError(404, "result '" + finalLocation + "' not found");				return;			}			//[			StringWriter sw = new StringWriter();			HttpResponseWrapper rw = new HttpResponseWrapper(response, sw);			//]			// If we're included, then include the view			// Otherwise do forward			// This allow the page to, for example, set content type			if (!response.isCommitted() && (request.getAttribute("javax.servlet.include.servlet_path") == null)) {				request.setAttribute("struts.view_uri", finalLocation);				request.setAttribute("struts.request_uri", request.getRequestURI());								// 处理参数				ResultConfig resultConfig = invocation.getProxy().getConfig().getResults().get(invocation.getResultCode());				if (resultConfig != null ) {					Map
    
      resultConfigParams = resultConfig.getParams();					for (Iterator
     
      
       > i = resultConfigParams.entrySet().iterator(); i.hasNext();) {						Map.Entry
       
         e = i.next();						String param = e.getKey().toString();						if (!getProhibitedResultParams().contains(param)) {							String potentialValue = (e.getValue() == null ? "" : conditionalParse(e.getValue().toString(), invocation));							requestParameters.put(param, potentialValue);						}					}				}				StringBuilder tmpLocation = new StringBuilder(finalLocation);				UrlHelper.buildParametersString(requestParameters, tmpLocation, "&");				finalLocation = response.encodeRedirectURL(tmpLocation.toString());								dispatcher.forward(request, rw);			} else {				dispatcher.include(request, rw);			}						rw.getWriter().close();						// pdf文件内容//	        log.debug(sw.toString());						// 通过ValueStack处理后的文件名，再编码			fileName = new String(requestParameters.get("fileName").getBytes(),"ISO8859-1");	        ITextRenderer renderer = new ITextRenderer();	        renderer.setDocumentFromString(sw.toString());	        if (request.getHeader("User-Agent").indexOf("MSIE 5.5") != -1) {				response.setHeader("Content-Disposition", "filename=" + fileName);			} else {				response.setHeader("Content-disposition", "attachment;filename=" + fileName);			}			response.setHeader("Content-Type", "application/octet-stream;charset=ISO8859-1");	        // 解决中文支持问题	        ITextFontResolver fontResolver = renderer.getFontResolver();				fontResolver.addFont(new File(this.getClass().getResource("SIMSUN.TTC").getFile()).getAbsolutePath(), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);			// 解决图片的相对路径问题	        //renderer.getSharedContext().setBaseURL("file:/E:/workspace/eclipse_utf-8_workspace/PdfTest/src/flyingsaucer/start/");	        renderer.layout();	        OutputStream os = response.getOutputStream();			renderer.createPDF(os);	        os.close();		}	}		// ********************************************************************	//	private & protected	// ********************************************************************		private void init(){		try {			this.fileName = new String("未命名文件.pdf".getBytes(),"ISO8859-1");		} catch (UnsupportedEncodingException e) {			log.debug(ExceptionUtils.getStackTrace(e));			this.fileName = new String("未命名文件.pdf"); 		}	}		protected List
        
          getProhibitedResultParams() {		return Arrays.asList(new String[]{				DEFAULT_PARAM, "namespace", "method", "encode", "parse", "location",				"prependServletContext", "supressEmptyParameters"});	}	 protected String conditionalParse(String param, ActionInvocation invocation) {		if (param != null && invocation != null) {			String finalValue = TextParseUtil.translateVariables(param, invocation.getStack());			log.debug(param + "通过值栈解析后的参数:" + finalValue);			return finalValue;		} else {			return param;		}	}		// ********************************************************************	//	setter and getter	// ********************************************************************		private String fileName;	protected Map
         
           requestParameters = new LinkedHashMap
          
           (); public String getFileName() { return fileName; } public void setFileName(String fileName) { try { this.fileName = new String(fileName.getBytes(),"ISO8859-1"); } catch (UnsupportedEncodingException e) { this.fileName = fileName; log.debug(ExceptionUtils.getStackTrace(e)); } } public Map
           
             getRequestParameters() { return requestParameters; } public void setRequestParameters(Map
            
              requestParameters) { this.requestParameters = requestParameters; }}
            
           
          
         
        
       
      
     
    

2、在struts.xml中注册自定义类型

       	
     		
      		……	
     	
     	
     
      		……	
     	
     	
     
      		……	
     
    

3、应用中使用自定义类型

    	
     
      /com/csmn/ext/yy/disposable/use_{1}.jsp
     	
     		
      /com/csmn/ext/yy/disposable/use_yearMonthGoodsUseList.jsp		
      医院${goodsUseDto.year}年${goodsUseDto.month}月一次性无菌物品出入库情况一栏表.pdf	
     
    

上面的type="pdf"即为第二步中result-types下的name="pdf"，参数${goodsUseDto.year}、${goodsUseDto.month}则通过第一步中TextParseUtil.translateVariables(param, invocation.getStack())处理为实际数据。