当客户访问网站时就去读这个文件,将服务器重新启动前的计数读入,并在此基础上增加1,然后将新的计数写入到文件中。
参考代码如下:
<html>
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< head > < meta http-equiv = "Content-Type" content = "text/html; charset=utf-8" > < title >Insert title here</ title > </ head > < body > <%! int number = 0; File file = new File("count.txt"); synchronized void countPeople() { if(!file.exists()) { number++; try{ file.createNewFile(); FileOutputStream out = new FileOutputStream("count.txt"); DataOutputStream dataOut = new DataOutputStream(out); dataOut.writeInt(number); dataOut.close(); }catch(IOException ex){} } else try{ FileInputStream in = new FileInputStream("count.txt"); DataInputStream dataIn = new DataInputStream(in); number = dataIn.readInt(); number++; in.close(); dataIn.close(); FileOutputStream out = new FileOutputStream("count.txt"); DataOutputStream dataOut = new DataOutputStream(out); dataOut.writeInt(number); out.close(); dataOut.close(); }catch(IOException ex){} } %> <% countPeople(); %> < p > 您是第 <%=number %> 个访问网站的客户。 </ p > </ body > </ html > |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。