jsp静态化之简单介绍

package com.zwd.text;import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.HttpURLConnection;import java.net.URL;import java.util.Date;public class Test {private static long star = 0;private static long end = 0;private static long ttime = 0;// 返回 html 代码public static String getHtmlCode(String httpUrl) {Date before = new Date();star = before.getTime();StringBuffer htmlCode = new StringBuffer(); //这里我做了改动,原文是用String,这样内存消耗会太大,原因我就不说了try {InputStream in;URL url = new java.net.URL(httpUrl);HttpURLConnection connection = (HttpURLConnection) url.openConnection();   //抽象连接connection = (HttpURLConnection) url.openConnection();connection.setRequestProperty("User-Agent", "Mozilla/ 4.0");//这句很重要，预防服务器拦截我们java程序的请求,如果少了就会被弹403等错误。connection.connect();                        //连接部分完成                        //=======================           华丽分界线            =================                        //io读写开始                          in = connection.getInputStream();   java.io.BufferedReader breader = new BufferedReader(new InputStreamReader(in, "UTF-8"));String currentLine;  while ((currentLine = breader.readLine()) != null) {  //以行的方式读取htmlCode.append(currentLine);}} catch (Exception e) {e.printStackTrace();} finally {                        //计算时耗                        Date after = new Date(); end = after.getTime(); ttime = end - star; System.out.println(" 执行时间 :" + ttime + " 毫秒 "); } return htmlCode.toString(); } // 存储文件 这里就做详细解释了,就是把上文获取的内容保存到指定文件而已 public static synchronized void writeHtml(String filePath, String info, String flag) { PrintWriter pw = null; try { File writeFile = new File(filePath);boolean isExit = writeFile.exists(); if (isExit != true) { writeFile.createNewFile(); } else { if (!flag.equals("NO")) { writeFile.delete();writeFile.createNewFile();}}pw = new PrintWriter(new FileOutputStream(filePath, true));pw.println(info); pw.close();} catch (Exception ex) {System.out.println(ex.getMessage());} finally {pw.close();}}public static void main(String[] args) {String url = "http://localhost:8080/online/index.do"; //目标网站writeHtml("d:/demo.html", getHtmlCode(url), "NO");     //目标网站静态化}}

这些代码是我从网上搜来的,其实网上材料很多,本人觉得这个写的是最好的,所以挑他来说下,其实静态化也不难,只是用最常见的方法,对把目标文件下载,或者应该说读取出来而已,

所以关键就在于io流的应用,从代码上看,其实也很简单,我也为大家一一注释下,希望对新手有点帮助,当然后事还没完成,列子只是给大家把怎么把一个页面静态化而已,如果大家想偷懒想容器自动静态化的话,只要配合写一个定时器就行了(定时器我别的文章页介绍了,这里就不多少)

核心部分也就是这样,如果等本人有时间,我再做一个实例,上传上来,提供大家参考吧.时间嘛,待定,呵呵