JS+JSP通过img标签调用实现静态页面访问次数统计的方法_javascript技巧

 
 
 
 
 
 
 
 
 
 
 this is a test page.

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="java.io.*"%>
<%
String path="/opt/test.txt";
writeNumber(String.valueOf(readNumber(path)+1),path);
%>
<%=readNumber(path) %>
<%!
 /**
 * 写入数字内容
 *
 * @param number
 * @param filename
 * @return
 */
 public boolean writeNumber(String number, String filename) {
 try {
 FileOutputStream fos = new FileOutputStream(filename);
 OutputStreamWriter writer = new OutputStreamWriter(fos);
 writer.write(number);
 writer.close();
 fos.close();
 } catch (IOException e) {
 e.printStackTrace();
 return false;
 }
 return true;
 }
 /**
 * 读取数字内容
 * 
 * @param filename
 * @return
 */
 public int readNumber(String filename) {
 int number = 0;
 try {
 File file = new File(filename);
 if (file.exists()) {
 FileReader fr = new FileReader(file);
 BufferedReader br = new BufferedReader(fr);
 String contents = br.readLine();
 if (contents != null && contents.length() > 0) {
 contents = contents.replaceAll("[^0-9]", "");
 number = Integer.valueOf(contents);
 }
 br.close();
 fr.close();
 }
 } catch (IOException e) {
 e.printStackTrace();
 }
 return number;
 }
%>