利用Struts2生成静态页面其实很灵活，很强大，尤其是利用Struts2对Freemarker较好的支持，充分利用Freemarker的模板功能来生成静态 页面。

基本思路为：利用Struts2对自定义result type的支持，自定义能够生成静态页面的result type，结合模板引擎Freemarker可以实现大批量静态页面的生成。

参看org.apache.struts2.views.freemarker.FreemarkerResult的代码实现，自定义了自己的生成静态页 面的result type。此种方案不单纯用于生成静态页面，其实也可以用于生成诸如wml、xhtml等内容，具体可以参考Struts2缺省提供的各种result type的实现。

package com.mobilesoft.esales.webapp.action;   import java.io.BufferedWriter;  import java.io.File;  import java.io.FileOutputStream;  import java.io.IOException;  import java.io.OutputStreamWriter;  import java.io.Writer;  import java.util.Locale;   import javax.servlet.ServletContext;  import javax.servlet.http.HttpServletRequest;  import javax.servlet.http.HttpServletResponse;   import org.apache.struts2.ServletActionContext;  import org.apache.struts2.dispatcher.StrutsResultSupport;  import org.apache.struts2.views.freemarker.FreemarkerManager;  import org.apache.struts2.views.util.ResourceUtil;   import com.opensymphony.xwork2.ActionContext;  import com.opensymphony.xwork2.ActionInvocation;  import com.opensymphony.xwork2.LocaleProvider;  import com.opensymphony.xwork2.inject.Inject;  import com.opensymphony.xwork2.util.ValueStack;   import freemarker.template.Configuration;  import freemarker.template.ObjectWrapper;  import freemarker.template.Template;  import freemarker.template.TemplateException;  import freemarker.template.TemplateModel;  import freemarker.template.TemplateModelException;     public class FreemarkerResult extends StrutsResultSupport {       private static final long serialVersionUID = -3778230771704661631L;       protected ActionInvocation invocation;      protected Configuration configuration;      protected ObjectWrapper wrapper;      protected FreemarkerManager freemarkerManager;      private Writer writer;      protected String location;      private String pContentType = “text/html”;       protected String fileName; // 要生成的静态页面名称      protected String filePath; // 要生成的静态页面的路径      protected String staticTemplate; // 用于生成静态页面Freemarker模板的路径       public FreemarkerResult() {          super();      }       public FreemarkerResult(String location) {          super(location);      }       @Inject      public void setFreemarkerManager(FreemarkerManager mgr) {          this.freemarkerManager = mgr;      }       public void setContentType(String aContentType) {          pContentType = aContentType;      }       public String getContentType() {          return pContentType;      }       public void doExecute(String location, ActionInvocation invocation)              throws IOException, TemplateException {          this.location = location;          this.invocation = invocation;          this.configuration = getConfiguration();          this.wrapper = getObjectWrapper();           this.fileName = (String) conditionalParse(fileName, invocation);          this.staticTemplate = (String) conditionalParse(staticTemplate, invocation);          this.filePath = ((String) conditionalParse(filePath, invocation)) == null ? “”                  : ((String) conditionalParse(filePath, invocation));           if (!location.startsWith(”/”)) {              ActionContext ctx = invocation.getInvocationContext();              HttpServletRequest req = (HttpServletRequest) ctx                      .get(ServletActionContext.HTTP_REQUEST);              String base = ResourceUtil.getResourceBase(req);              location = base + “/” + location;          }           //生成html页面的模板类          Template template = configuration.getTemplate(location, deduceLocale());          // 生成静态页面的的模板类          Template staticTemplate = configuration.getTemplate(this.staticTemplate,                  deduceLocale());           TemplateModel model = createModel();          String path = ServletActionContext.getServletContext().getRealPath(                  filePath)                  + File.separator;          Writer out = new BufferedWriter(new OutputStreamWriter(                  new FileOutputStream(path + fileName)));           if (preTemplateProcess(template, model)) {              try {                  staticTemplate.process(model, out);                  template.process(model, getWriter());              } finally {                  postTemplateProcess(template, model);                  postTemplateProcess(staticTemplate, model);              }          }      }       protected Configuration getConfiguration() throws TemplateException {          return freemarkerManager.getConfiguration(ServletActionContext                  .getServletContext());      }       protected ObjectWrapper getObjectWrapper() {          return configuration.getObjectWrapper();      }       public void setWriter(Writer writer) {          this.writer = writer;      }       protected Writer getWriter() throws IOException {          if (writer != null) {              return writer;          }          return ServletActionContext.getResponse().getWriter();      }       protected TemplateModel createModel() throws TemplateModelException {          ServletContext servletContext = ServletActionContext                  .getServletContext();          HttpServletRequest request = ServletActionContext.getRequest();          HttpServletResponse response = ServletActionContext.getResponse();          ValueStack stack = ServletActionContext.getContext().getValueStack();           Object action = null;          if (invocation != null)              action = invocation.getAction(); // Added for NullPointException          return freemarkerManager.buildTemplateModel(stack, action,                  servletContext, request, response, wrapper);      }       protected Locale deduceLocale() {          if (invocation.getAction() instanceof LocaleProvider) {              return ((LocaleProvider) invocation.getAction()).getLocale();          } else {              return configuration.getLocale();          }      }       protected void postTemplateProcess(Template template, TemplateModel data)              throws IOException {      }       protected boolean preTemplateProcess(Template template, TemplateModel model)              throws IOException {          Object attrContentType = template.getCustomAttribute(”content_type”);           if (attrContentType != null) {              ServletActionContext.getResponse().setContentType(                      attrContentType.toString());          } else {              String contentType = getContentType();               if (contentType == null) {                  contentType = “text/html”;              }               String encoding = template.getEncoding();               if (encoding != null) {                  contentType = contentType + “; charset=” + encoding;              }               ServletActionContext.getResponse().setContentType(contentType);          }           return true;      }       public String getFileName() {          return fileName;      }       public void setFileName(String fileName) {          this.fileName = fileName;      }       public String getFilePath() {          return filePath;      }       public void setFilePath(String filePath) {          this.filePath = filePath;      }       public String getStaticTemplate() {          return staticTemplate;      }       public void setStaticTemplate(String staticTemplate) {          this.staticTemplate = staticTemplate;      }  }