當客戶訪問網站時就去讀這個文件,將服務器重新啟動前的計數讀入,并在此基礎上增加1,然后將新的計數寫入到文件中。
參考代碼如下:
<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 %> 個訪問網站的客戶。 </ p > </ body > </ html > |
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持服務器之家。