亚洲天堂中文字幕_ 網(wǎng)站HTML靜態(tài)化解決方案

最近在做一個(gè)項目，其中一部分的訪(fǎng)問(wèn)頻率較高但內容變動(dòng)較小。所以使用網(wǎng)站HTML靜態(tài)化方案來(lái)優(yōu)化訪(fǎng)問(wèn)速度

當一個(gè)Servlet資源請求到達WEB服務(wù)器之后我們會(huì )填充指定的JSP頁(yè)面來(lái)響應請求:

HTTP請求---Web服務(wù)器---Servlet--業(yè)務(wù)邏輯處理--訪(fǎng)問(wèn)數據--填充JSP--響應請求

HTML靜態(tài)化之后:

HTTP請求---Web服務(wù)器---Servlet--HTML--響應請求

嘿嘿，是不是很爽？省去了業(yè)務(wù)邏輯處理和數據抓取直接響應。

Servlet:

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public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
if(request.getParameter("chapterId") != null){
String chapterFileName = "bookChapterRead_"+request.getParameter("chapterId")+".html";
String chapterFilePath = getServletContext().getRealPath("/") + chapterFileName;
File chapterFile = new File(chapterFilePath);
if(chapterFile.exists()){response.sendRedirect(chapterFileName);return;}//如果有這個(gè)文件就告訴瀏覽器轉向
INovelChapterBiz novelChapterBiz = new NovelChapterBizImpl();
NovelChapter novelChapter = novelChapterBiz.searchNovelChapterById(Integer.parseInt(request.getParameter("chapterId")));//章節信息
int lastPageId = novelChapterBiz.searchLastCHapterId(novelChapter.getNovelId().getId(), novelChapter.getId());
int nextPageId = novelChapterBiz.searchNextChapterId(novelChapter.getNovelId().getId(), novelChapter.getId());
request.setAttribute("novelChapter", novelChapter);
request.setAttribute("lastPageId", lastPageId);
request.setAttribute("nextPageId", nextPageId);
new CreateStaticHTMLPage().createStaticHTMLPage(request, response, getServletContext(),
chapterFileName, chapterFilePath, "/bookRead.jsp");
}
}

public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {if(request.getParameter("chapterId") != null){String chapterFileName = "bookChapterRead_"+request.getParameter("chapterId")+".html";String chapterFilePath = getServletContext().getRealPath("/") + chapterFileName;File chapterFile = new File(chapterFilePath);if(chapterFile.exists()){response.sendRedirect(chapterFileName);return;}//如果有這個(gè)文件就告訴瀏覽器轉向INovelChapterBiz novelChapterBiz = new NovelChapterBizImpl();NovelChapter novelChapter = novelChapterBiz.searchNovelChapterById(Integer.parseInt(request.getParameter("chapterId")));//章節信息int lastPageId = novelChapterBiz.searchLastCHapterId(novelChapter.getNovelId().getId(), novelChapter.getId());int nextPageId = novelChapterBiz.searchNextChapterId(novelChapter.getNovelId().getId(), novelChapter.getId());request.setAttribute("novelChapter", novelChapter);request.setAttribute("lastPageId", lastPageId);request.setAttribute("nextPageId", nextPageId);new CreateStaticHTMLPage().createStaticHTMLPage(request, response, getServletContext(),chapterFileName, chapterFilePath, "/bookRead.jsp");}}

生成HTML靜態(tài)頁(yè)面的類(lèi):

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package com.jb.y2t034.thefifth.web.servlet;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
/**
* 創(chuàng )建HTML靜態(tài)頁(yè)面
* 功能：創(chuàng )建HTML靜態(tài)頁(yè)面
* 時(shí)間：2009年1011日
* 地點(diǎn)：home
* @author mavk
*
*/
public class CreateStaticHTMLPage {
/**
* 生成靜態(tài)HTML頁(yè)面的方法
* @param request 請求對象
* @param response 響應對象
* @param servletContext Servlet上下文
* @param fileName 文件名稱(chēng)
* @param fileFullPath 文件完整路徑
* @param jspPath 需要生成靜態(tài)文件的JSP路徑(相對即可)
* @throws IOException
* @throws ServletException
*/
public void createStaticHTMLPage(HttpServletRequest request, HttpServletResponse response,ServletContext servletContext,String fileName,String fileFullPath,String jspPath) throws ServletException, IOException{
response.setContentType("text/html;charset=gb2312");//設置HTML結果流編碼(即HTML文件編碼)
RequestDispatcher rd = servletContext.getRequestDispatcher(jspPath);//得到JSP資源
final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();//用于從ServletOutputStream中接收資源
final ServletOutputStream servletOuputStream = new ServletOutputStream(){//用于從HttpServletResponse中接收資源
public void write(byte[] b, int off,int len){
byteArrayOutputStream.write(b, off, len);
}
public void write(int b){
byteArrayOutputStream.write(b);
}
};
final PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(byteArrayOutputStream));//把轉換字節流轉換成字符流
HttpServletResponse httpServletResponse = new HttpServletResponseWrapper(response){//用于從response獲取結果流資源(重寫(xiě)了兩個(gè)方法)
public ServletOutputStream getOutputStream(){
return servletOuputStream;
}
public PrintWriter getWriter(){
return printWriter;
}
};
rd.include(request, httpServletResponse);//發(fā)送結果流
printWriter.flush();//刷新緩沖區，把緩沖區的數據輸出
FileOutputStream fileOutputStream = new FileOutputStream(fileFullPath);
byteArrayOutputStream.writeTo(fileOutputStream);//把byteArrayOuputStream中的資源全部寫(xiě)入到fileOuputStream中
fileOutputStream.close();//關(guān)閉輸出流，并釋放相關(guān)資源
response.sendRedirect(fileName);//發(fā)送指定文件流到客戶(hù)端
}
}

引用：http://blog.csdn.net/zjwilove4/archive/2009/10/18/4695518.aspx

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