jsp中实现简单计数器代码学习

分享一段自己在实际项目中的一个计数器，
<%

BufferedReader inf = new BufferedReader(new FileReader("/path/to/counter.txt"));
int tmp = Integer.parseInt(inf.readLine());
int i=0;

try {

i = Integer.parseInt(request.getSession().getValue("tal").toString());
} catch (NullPointerException t) {i=0; }

if (i==0) {
tmp++;

PrintWriter outf = new PrintWriter(new BufferedWriter(new FileWriter("/path/to/counter.txt")));
outf.println(tmp);
outf.close();
inf.close();
request.getSession().putValue("tal", "1");
}//http://www.javalearns.com

BufferedReader inf2 = new BufferedReader(new FileReader("/path/to/counter.txt"));
%>
<%
String zeroes="";
String hits = inf2.readLine();
inf2.close();
for (int t=0; t < 8-hits.length(); t++) {
zeroes=zeroes+"0"; }
out.println(zeroes + hits);
%>