package util.web;
import java.io.*;
public class Util {
???
??? /**
???? * 刪除文件
??? */
??? public static void rm(String filepath) throws IOException {
??????? File f = new File(filepath);//定義文件路徑
??????? if (f.exists()) {//判斷是文件還是目錄
??????????? if (f.isFile()) {
??????????????? f.delete();
??????????? } else if (f.isDirectory()) {
??????????????? if (f.listFiles().length == 0) {//若目錄下沒(méi)有文件則直接刪除
??????????????????? f.delete();
??????????????? } else {//若有則把文件放進(jìn)數(shù)組，并判斷是否有下級(jí)目錄
??????????????????? File delFile[] = f.listFiles();
??????????????????? int i = f.listFiles().length;
??????????????????? for (int j = 0; j < i; j++) {
??????????????????????? if (delFile[j].isDirectory()) {
??????????????????????????? rm(delFile[j].getAbsolutePath());//遞歸調(diào)用del方法并取得子目錄路徑
??????????????????????? }
??????????????????????? delFile[j].delete();//刪除文件
??????????????????? }
??????????????? }
??????????? }
??????? }
??? }
}
<-@@@@@@@@@@@@@@@@@@@@@>
package util.web;
/**
?* 頁(yè)面計(jì)數(shù)器
?* @author Dave
?*/
public class Pagination {
??? public static final int PAGE_SIZE = 15;
??? private int totalPages = 1;
??? private int currPage = 1;
??? private int totalRecords = 0;
??? private int firstRecord = 1;
??? private int lastRecord = 1;
??? private int pageSize = PAGE_SIZE;
??? public Pagination(int firstRecoder, int pageSize) {
??????? this.firstRecord = firstRecoder;
??????? this.pageSize = pageSize;
??? }
??? public int getFirstRecord() {
??????? return firstRecord;
??? }
??? public int getPageSize() {
??????? return pageSize;
??? }
??? public int getTotalRecords() {
??????? return totalRecords;
??? }
??? public void setTotalRecords(int totalRecords) {
??????? this.totalRecords = totalRecords;
??????? if(totalRecords > 0){
??????????? init();
??????? }
??? }
??? public int getCurrPage() {
??????? return currPage;
??? }
??? public int getLastRecord() {
??????? return lastRecord;
??? }
??? public int getTotalPages() {
??????? return totalPages;
??? }
??? private void init() {
??????? int test;
??????? test = totalRecords % pageSize;
??????? totalPages = test == 0 ? totalRecords / pageSize : totalRecords / pageSize + 1;
??????? if (firstRecord >= totalRecords) {
??????????? firstRecord = (totalPages - 1) * pageSize + 1;
??????? }
??????? currPage = firstRecord / pageSize + 1;
??????? lastRecord = (firstRecord + pageSize) > totalRecords ? totalRecords : firstRecord + pageSize - 1;
??? }
??? /**
???? * 獲取數(shù)據(jù)查詢(xún)?cè)L問(wèn)的第一條記錄
???? * @return
???? */
??? public int getStartRow() {
??????? if(firstRecord<=1)
??????????? return 0;
??????? return this.firstRecord - 1;
??? }
??? public String getHeader() {
??????? return "<script language=\"JavaScript\">writeHeader(" + firstRecord + "," + lastRecord + "," + totalRecords + "," + pageSize + "," + currPage + "," + totalPages + ")</script>";
??? }
??? public String getFooter() {
??????? return "<script language=\"JavaScript\">writeFooter(" + currPage + "," + totalPages + "," + firstRecord + "," + pageSize + "," + totalRecords + ")</script>";
??? }
}
<#####################>
package util.web;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
/**
?* @author Dave
?*/
public class CacheMappingFilter implements Filter {
??? //???? ----------------------------------------------------- Instance Variables
??? /**
???? * The default character encoding to set for requests that pass through
???? * this filter.
???? */
??? protected String enable = null;
??? /**
???? * The filter configuration object we are associated with. If this value
???? * is null, this filter instance is not currently configured.
???? */
??? protected FilterConfig filterConfig = null;
??? /**
???? * Should a character encoding specified by the client be ignored?
???? */
??? protected boolean ignore = true;
??? //???? --------------------------------------------------------- Public Methods
??? /**
???? * Take this filter out of service.
???? */
??? public void destroy() {
??????? this.enable = null;
??????? this.filterConfig = null;
??? }
??? /**
???? * Select and set (if specified) the character encoding to be used to
???? * interpret request parameters for this request.
???? *
???? * @param request The servlet request we are processing
???? * @param result The servlet response we are creating
???? * @param chain The filter chain we are processing
???? *
???? * @exception IOException if an input/output error occurs
???? * @exception ServletException if a servlet error occurs
???? */
??? public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
??????? //???? Pass control on to the next filter
??????? //
??????? //request.setCharacterEncoding("utf-8");
??????? HttpServletRequest req = (HttpServletRequest) request;
??????? String path = req.getServletPath();
??????? String pageCacheEnable = (String)StaticValue.cacheMapping.get(path);
??????? if ((!path.startsWith("/admin")) && path.endsWith(".jsp")&&req.getParameter("makeCache")==null&&"true".equals(pageCacheEnable)) {
??????????????? path = path.replaceAll(".jsp", "_cache.html");
????????????????? //? System.out.println(path);
??????????????????? //?? System.out.println(req.getRequestURI());
???????????????????? //? System.out.println(req.getRequestURL());
??????????????? request.getRequestDispatcher("/cache"+path).forward(request, response);
??????? } else {
??????????? chain.doFilter(request, response);
??????? }
??? }
??? /**
???? * Place this filter into service.
???? *
???? * @param filterConfig The filter configuration object
???? */
??? public void init(FilterConfig filterConfig) throws ServletException {
??????? this.filterConfig = filterConfig;
??????? this.enable = filterConfig.getInitParameter("enable");
??? }
}
<%%%%%%%%%%%>
package util.web;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;
public class StaticHtmlCache {
??? private static long star = 0;
??? private static long end = 0;
??? private static long ttime = 0;
??? //??? 返回html代碼
??? public static String getHtmlCode(String httpUrl) {
??????? Date before = new Date();
??????? star = before.getTime();
??????? String htmlCode = "";
??????? try {
??????????? InputStream in;
??????????? URL url = new java.net.URL(httpUrl);
??????????? HttpURLConnection connection = (HttpURLConnection) url.openConnection();
??????????? connection = (HttpURLConnection) url.openConnection();
??????????? connection.setRequestProperty("User-Agent", "Mozilla/4.0");
??????????? connection.connect();
??????????? in = connection.getInputStream();
??????????? java.io.BufferedReader breader = new BufferedReader(new InputStreamReader(in, "UTF8"));
??????????? String currentLine;
??????????? while ((currentLine = breader.readLine()) != null) {
??????????????? htmlCode = htmlCode + currentLine + '\n';
??????????? }
??????? } catch (Exception e) {
??????????? e.printStackTrace();
??????? } finally {
??????????? Date after = new Date();
??????????? end = after.getTime();
??????????? ttime = end - star;
??????????? System.out.println("執(zhí)行時(shí)間:" + ttime + "秒");
??????? }
??????? //System.out.print(htmlCode);
??????? return htmlCode;
??? }
??? //??? 存儲(chǔ)文件
??? public static synchronized void writeHtml(String filePath, String info, boolean override,String encoding) {
??????? Writer out = null;
??????? File afile = new File(filePath);
??????? try {
??????????? boolean isExit = afile.exists();
??????????? if (isExit) {
??????????????? if (override){
??????????????????? afile.delete();
??????????????????? afile.createNewFile();
??????????????? }
??????????? } else {
??????????????? afile.createNewFile();
??????????? }
???????????
??????????? out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(afile), encoding));
??????????? out.write(info);
??????????? out.flush();
???????????
??????? } catch (Exception ex) {
??????????? System.out.println(ex.getMessage());
??????? } finally {
??????????? try{out.close();}catch (Exception e) {
??????????? }
??????? }
??? }
??? public static void main(String[] args) {
??????? String url = "http://localhost:18080/zzesweb/index.jsp";
??????? writeHtml("d:/in2.htm", getHtmlCode(url), true,"utf-8");
??? }
}