Struts2和Freemarker整合参数
?
struts2对freemarker有支持。
在response里可以通过加参数来指定显示模式为freemarker
分析下：
<action name=”staticViewAction” class=”com.mobilesoft.esales.webapp.action.StaticViewtAction”> <result name=”success” type=”staticview”> <param name=”location”>test/freemarkertest.ftl</param> <param name=”contentType”>text/html</param> <param name=”fileName”>${filename}</param> <param name=”staticTemplate”>test/freemarkertest.ftl</param> <param name=”filePath”>static</param> </result> </action> ??
可能是继承重写方法：
在org.apache.struts2.views.freemarker.FreemarkerResult.java
中，只有location和pContentType属性.
ackage 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;??? }}??