package util.web;
import java.io.*;
public class Util {
/**
* 删除文件
*/
public static void rm(String filepath) throws IOException {
File f = new File(filepath);//定义文件路径
if (f.exists()) {//判断是文件还是目录
if (f.isFile()) {
f.delete();
} else if (f.isDirectory()) {
if (f.listFiles().length == 0) {//若目录下没有文件则直接删除
f.delete();
} else {//若有则把文件放进数组，并判断是否有下级目录
File delFile[] = f.listFiles();
int i = f.listFiles().length;
for (int j = 0; j < i; j++) {
if (delFile[j].isDirectory()) {
rm(delFile[j].getAbsolutePath());//递归调用del方法并取得子目录路径
}
delFile[j].delete();//删除文件
}
}
}
}
}
}
<-@@@@@@@@@@@@@@@@@@@@@>
package util.web;
/**
* 页面计数器
* @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;
}
/**
* 获取数据查询访问的第一条记录
* @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代码
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("执行时间:" + ttime + "秒");
}
//System.out.print(htmlCode);
return htmlCode;
}
// 存储文件
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");
}
}