package struts2.velocity;import java.io.OutputStreamWriter;import java.io.StringWriter;import java.io.Writer;import javax.servlet.Servlet;import javax.servlet.ServletContext;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.jsp.JspFactory;import javax.servlet.jsp.PageContext;import org.apache.struts2.ServletActionContext;import org.apache.struts2.dispatcher.VelocityResult;import org.apache.struts2.views.JspSupportServlet;import org.apache.struts2.views.velocity.VelocityManager;import org.apache.velocity.Template;import org.apache.velocity.context.Context;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.util.ValueStack;import com.opensymphony.xwork2.util.logging.Logger;import com.opensymphony.xwork2.util.logging.LoggerFactory;public class VelocityLayoutResult extends VelocityResult {private static final long serialVersionUID = 6020934292083047099L;private static final Logger LOG = LoggerFactory.getLogger(VelocityLayoutResult.class);public static String KEY_SCREEN_CONTENT = "screen_content";public static String KEY_LAYOUT = "layout";public static final String PROPERTY_DEFAULT_LAYOUT = "tools.view.servlet.layout.default.template";public static final String PROPERTY_LAYOUT_DIR = "tools.view.servlet.layout.directory";public static final String PROPERTY_INPUT_ENCODING = "input.encoding";public static final String PROPERTY_OUTPUT_ENCODING = "output.encoding";public static final String PROPERTY_CONTENT_TYPE = "default.contentType";protected VelocityManager velocityManager;protected String defaultLayout;protected String layoutDir;protected String inputEncoding;protected String outputEncoding;protected String contentType;@Overridepublic void setVelocityManager(VelocityManager mgr) {   this.velocityManager = mgr;   super.setVelocityManager(mgr);}@Overridepublic void doExecute(String finalLocation, ActionInvocation invocation) throws Exception {   ValueStack stack = ActionContext.getContext().getValueStack();   HttpServletRequest request = ServletActionContext.getRequest();   HttpServletResponse response = ServletActionContext.getResponse();   JspFactory jspFactory = null;   ServletContext servletContext = ServletActionContext.getServletContext();   Servlet servlet = JspSupportServlet.jspSupportServlet;   velocityManager.init(servletContext);   boolean usedJspFactory = false;   PageContext pageContext = (PageContext) ActionContext.getContext().get(ServletActionContext.PAGE_CONTEXT);   if (pageContext == null && servlet != null) {    jspFactory = JspFactory.getDefaultFactory();    pageContext = jspFactory.getPageContext(servlet, request, response, null, true, 8192, true);    ActionContext.getContext().put(ServletActionContext.PAGE_CONTEXT, pageContext);    usedJspFactory = true;   }   try {    String encoding = getEncoding(finalLocation);    String contentType = getContentType(finalLocation);    if (encoding != null) {     contentType = contentType + ";charset=" + encoding;    }    Template t = getTemplate(stack, velocityManager.getVelocityEngine(), invocation, finalLocation, encoding);    Context context = createContext(velocityManager, stack, request, response, finalLocation);    StringWriter stringWriter = new StringWriter();    t.merge(context, stringWriter);    context.put(KEY_SCREEN_CONTENT, stringWriter.toString());    Object obj = context.get(KEY_LAYOUT);    String layout = (obj == null) ? null : obj.toString();    defaultLayout = (String) velocityManager.getVelocityEngine().getProperty(PROPERTY_DEFAULT_LAYOUT);    layoutDir = (String) velocityManager.getVelocityEngine().getProperty(PROPERTY_LAYOUT_DIR);    if (!layoutDir.endsWith("/")) {     layoutDir += '/';    }    if (!layoutDir.startsWith("/")) {     layoutDir = "/" + layoutDir;    }    defaultLayout = layoutDir + defaultLayout;    if (layout == null) {     layout = defaultLayout;    } else {     layout = layoutDir + layout;    }    Template layoutVm = null;    try {     inputEncoding = (String) velocityManager.getVelocityEngine().getProperty(PROPERTY_INPUT_ENCODING);     layoutVm = getTemplate(stack, velocityManager.getVelocityEngine(), invocation, layout, inputEncoding);    } catch (Exception e) {     LOG.error("VelocityLayoutResult: Can't load layout \"" + layout + "\": " + e);     if (!layout.equals(defaultLayout)) {      layoutVm = getTemplate(stack, velocityManager.getVelocityEngine(), invocation, defaultLayout,        inputEncoding);     }    }    outputEncoding = (String) velocityManager.getVelocityEngine().getProperty(PROPERTY_OUTPUT_ENCODING);    Writer writer = new OutputStreamWriter(response.getOutputStream(), outputEncoding);    response.setContentType(contentType);    layoutVm.merge(context, writer);    writer.flush();   } catch (Exception e) {    LOG.error("Unable to render Velocity Template, '" + finalLocation + "'", e);    throw e;   } finally {    if (usedJspFactory) {     jspFactory.releasePageContext(pageContext);    }   }   return;}}

     
       
      
      
      
           
           
          
           
        
         result.vm