缓存静态化处理流程：
关键代码：
本代码以jsp为例，其实还可以用freemarker等模板语言，但本人认为页面静态化属于后期优化工作，目前jsp应用要比freemarker要广泛，所以jsp更具有意义。protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException
{
//实际中这个路径会根据参数在一定规则的计算下得到，保证其唯一性
File f = new File("/htmls/test.html");
if (!f.exists())
{
//加工数据，实际中会调用service
request.setAttribute("name","测试");
String content = JspUtil.getHtml(request, response,"/index.jsp");
FileUtil.save(content, "/htmls", null, "test.html");
}
StringBuffer sb = new StringBuffer();
FileReader fr = new FileReader(f);
BufferedReader br = new BufferedReader(fr);
String str = null;
while ((str = br.readLine()) != null)
{
sb.append(str);
}
fr.close();
br.close();
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
out.print(sb.toString());
out.flush();
}
一个简易的工具类：public class JspUtil{
public static String getHtml(HttpServletRequest request,
HttpServletResponse response, String jsp) throws ServletException,IOException
{
FileCaptureResponseWrapper fileCaptureResponseWrapper = new FileCaptureResponseWrapper(response);
request.getRequestDispatcher(jsp).forward(request,fileCaptureResponseWrapper);
return fileCaptureResponseWrapper.toString();
}
public static class FileCaptureResponseWrapper extends HttpServletResponseWrapper
{
private CharArrayWriter writer;
public FileCaptureResponseWrapper(HttpServletResponse response)
{
super(response);
this.writer = new CharArrayWriter();
}
public PrintWriter getWriter()
{
return new PrintWriter(writer);
}
@Override
public String toString()
{
String result = writer.toString();
writer.flush();
writer.close();
return result;
}
}
}
得到html代码后，可以存储到磁盘上，同样也可以应用缓存框架等工具，具体可以看具体情况而定。至于更新，可以设置时间更新，比如一天一次。同样也可以手动更新，比如编辑有一个即时更新首页的需要，这种情况最好手动更新啦。具体做法就是把存储的html数据清空就可以了！
