这里对freemarker的代码进行了修改，效果:
1,请求.do的URL时直接生成对应的.htm文件,并将请求转发到该htm文件
2,自由控制某个页面是否需要静态化
原理：对org.springframework.web.servlet.view.freemarker.FreeMarkerView类进行扩展
第一步：在web.xml中将*.do请求交给SpringMVC
<servlet>
<servlet-name>demo</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/demo-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>demo</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
第二步：配置/WEB-INF/demo-servlet.xml
<!--freemarker页面解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
<property name="suffix" value=".ftl"></property>
<property name="contentType" value="text/html;charset=UTF-8" />
<!-- <property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView" /> -->
<!-- 将Spring的FreeMarkerView改成我们扩展的View -->
<property name="viewClass" value="com.myview.MyFreeMarkerView" />
<property name="exposeRequestAttributes" value="true" />
<property name="exposeSessionAttributes" value="true" />
<property name="exposeSpringMacroHelpers" value="true" />
</bean>
<bean id="fmXmlEscape" class="freemarker.template.utility.XmlEscape" />
<!--配置Freemarker -->
<bean id="freemarkerConfigurer" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
<property name="templateLoaderPath" value="/WEB-INF/freemarker/"></property>
<property name="freemarkerVariables">
<map>
<entry key="xml_escape" value-ref="fmXmlEscape" />
</map>
</property>
<property name="freemarkerSettings">
<props>
<prop key="template_update_delay">1</prop>
<prop key="defaultEncoding">UTF-8</prop>
</props>
</property>
</bean>
第三步：新建package,com.myview,新建一个MyFreeMarkerView,继承自org.springframework.web.servlet.view.freemarker.FreeMarkerView,在这里对原类进行扩展
package com.myview;
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 java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.support.RequestContextUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerView;
import freemarker.template.SimpleHash;
import freemarker.template.Template;
import freemarker.template.TemplateException;
public class MyFreeMarkerView extends FreeMarkerView{
@Override
protected void doRender(Map<String, Object> model,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
// Expose model to JSP tags (as request attributes).
exposeModelAsRequestAttributes(model, request);
// Expose all standard FreeMarker hash models.
SimpleHash fmModel = buildTemplateModel(model, request, response);
if (logger.isDebugEnabled()) {
logger.debug("Rendering FreeMarker template [" + getUrl() + "] in FreeMarkerView '" + getBeanName() + "'");
}
// Grab the locale-specific version of the template.
Locale locale = RequestContextUtils.getLocale(request);
/*
* 默认生成静态文件,除非在编写ModelAndView时指定CREATE_HTML = false,
* 这样对静态文件生成的粒度控制更细一点
* 例如：ModelAndView mav = new ModelAndView("search");
* mav.addObject("CREATE_HTML", false);
*/
if(Boolean.FALSE.equals(model.get("CREATE_HTML"))){
processTemplate(getTemplate(locale), fmModel, response);
}else{
createHTML(getTemplate(locale), fmModel, request, response);
}
}
public void createHTML(Template template, SimpleHash model,HttpServletRequest request,
HttpServletResponse response) throws IOException, TemplateException, ServletException {
//站点根目录的绝对路径
String basePath = request.getSession().getServletContext().getRealPath("/");
String requestHTML = this.getRequestHTML(request);
//静态页面绝对路径
String htmlPath = basePath + requestHTML;
File htmlFile = new File(htmlPath);
if(!htmlFile.getParentFile().exists()){
htmlFile.getParentFile().mkdirs();
}
if(!htmlFile.exists()){
htmlFile.createNewFile();
}
Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(htmlFile), "UTF-8"));
//处理模版
template.process(model, out);
out.flush();
out.close();
/*将请求转发到生成的htm文件*/ request.getRequestDispatcher(requestHTML).forward(request, response);
}
/**
* 计算要生成的静态文件相对路径
* 因为大家在调试的时候一般在Tomcat的webapps下面新建站点目录的，
* 但在实际应用时直接布署到ROOT目录里面,这里要保证路径的一致性。
* @param request HttpServletRequest
* @return /目录/*.htm
*/
private String getRequestHTML(HttpServletRequest request){
//web应用名称,部署在ROOT目录时为空
String contextPath = request.getContextPath();
//web应用/目录/文件.do
String requestURI = request.getRequestURI();
//basePath里面已经有了web应用名称，所以直接把它replace掉，以免重复
requestURI = requestURI.replaceFirst(contextPath, "");
//将.do改为.htm,稍后将请求转发到此htm文件
requestURI = requestURI.substring(0, requestURI.indexOf(".")) + ".htm";
return requestURI;
}
}
到这里就基本完成了。
一个Controller类的例子：
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class IndexController {
@RequestMapping("/index.do")
public ModelAndView index(){
ModelAndView mav = new ModelAndView("index");
mav.addObject("title", "网站标题");
mav.addObject("origin", "freemarker");
//在这里可以控制不生成静态htm
mav.addObject("CREATE_HTML", false);
return mav;
}
@RequestMapping("/abc/index.do")
public ModelAndView abcindex(){
ModelAndView mav = new ModelAndView("index");
mav.addObject("origin", "html");
//默认生成htm文件
mav.addObject("title", "网站标题");
return mav;
}
}
测试结果如下：
