网站首页如何静态化
网站是个投资类的门户，www.investide.cn 投资潮。首页内容较多，有四屏多吧，数据库调用也很多，虽然数据库层做了缓存，页面上也使用了oscache，但还是感觉慢，于是想到做静态化。
用quartz来定时抓取动态页面的内容，生成静态页面
首页顶部的登录，用ajax来加载
<!-- 首页静态页的定时任务 ,每5分钟运行一次--><bean id="indexHtmlJobBean" class="com.dbcapital.job.HtmlJob" singleton="false"></bean><bean id="indexHtmlJob" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"> <property name="targetObject"> <ref bean="indexHtmlJobBean"/> </property> <property name="targetMethod"> <value>execute</value> </property></bean><bean id="indexHtmlJobTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean"><property name="jobDetail" ref="indexHtmlJob"/><property name="cronExpression" value="0 0/5 * * * ?"/></bean><!-- 首页静态页任务配置结束 -->
public void execute() {String url="http://www.investide.cn/index.do";String filePath=PropertyUtil.getProperty("dbcapital.root.path")+"index.html";//创建文件File file=new File(filePath);try{if(!file.exists()){file.createNewFile();}}catch(IOException e){}//生成文件String content=UrlfileInfo.readUrlContent(url);if(!StringUtil.isEmpty(content)){DocUtil.writeFile(content,filePath);//写静态文件}}
public static String readUrlContent(String url){StringBuffer sb=new StringBuffer();try{String strLine;URL urlObj = new URL(url);InputStream streamObj = urlObj.openStream();InputStreamReader readerObj = new InputStreamReader(streamObj,"GBK");BufferedReader buffObj = new BufferedReader(readerObj);while((strLine = buffObj.readLine())!=null) sb.append(strLine+"\r");buffObj.close();}catch(MalformedURLException e){System.err.println("url error");}catch(IOException e){System.out.println("IO error");} return sb.toString();}
public static boolean writeFile(String str,String filePath){boolean result=true;try{Writer fw = new OutputStreamWriter(new FileOutputStream (filePath),"GBK");fw.write(str);fw.close();}catch(IOException e){result=false;System.out.println("写文件失败");}return result;}
ajax加载登录代码
<span id="loginInfo">正在载入，请稍后...</span>
将login.jsp的状态加载到loginInfo里
theHREF = window.top.location.href.split('/');hostHREF='';for(i=3;i<theHREF.length;i++){hostHREF=hostHREF+'/'+theHREF;}setTimeout("fillData('/top_login.jsp?fromUrl="+hostHREF+"&t="+new Date()+"','loginInfo')",1000);
替换登录内容的js
function fillData(url,elementId){http_request=false;if(window.ActiveXObject){try{http_request=new ActiveXObject("MSXML2.XMLHttp"); }catch(e){try{http_request=new ActiveXObject("Microsoft.XMLHTTP"); }catch(e){}} }else if (window.XMLHttpRequest) { // Mozilla, Safari, ...http_request = new XMLHttpRequest();http_request.overrideMimeType('text/xml');}http_request.onreadystatechange = function() {if (http_request.readyState == 4) {if (http_request.status == 200) {var str=http_request.responseText;document.getElementById(elementId).innerHTML=str;} else {alert("服务器忙，请稍候再试！");}} else {document.getElementById(elementId).innerHTML="载入中，请稍候...";}};http_request.open('GET', url+"&t="+new Date(), true);http_request.send(null);}
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