| 发表于：2007-05-25 15:35:10 楼主 |
代码如下:
public class cookiecounter extends httpservlet {
private static final string content_type = "text/html; charset=gbk ";
private int pagecount=0;
//initialize global variables
public void init（servletconfig config) throws servletexception {
super.init（config);
string s=getinitparameter（ "initial ");
if（s==null){
pagecount=0;
}else{
pagecount=integer.parseint（s);
}
}
//process the http get request
public void doget（httpservletrequest request, httpservletresponse response) throws
servletexception, ioexception {
response.setcontenttype（content_type);
printwriter out = response.getwriter（);
boolean cookiefound=false;
cookie thiscookie=null;
cookie[] cookies=request.getcookies（);
if（cookies!=null){
for（int i=0;i <cookies.length;i++){
thiscookie=cookies[i];
if（thiscookie.getname（).equals（ "cookiecount ")){
cookiefound=true;
break;
}
}
}
if（cookiefound==false){
thiscookie=new cookie（ "cookiecount ", "1 ");
thiscookie.setmaxage（60*1);
response.addcookie（thiscookie);
}
out.println（ " <html> ");
out.println（ " <head> <title> cookie counter </title> </head> ");
out.println（ " <body bgcolor=\ "#ffffff\ "> ");
out.println（ " <h1 align=center> cookie counter </h1> ");
pagecount++;
out.println（ " <p> 此页面已被访问过 "+pagecount+ "次 ");
if（cookiefound){
int cookiecount=integer.parseint（thiscookie.getvalue（));
cookiecount++;
thiscookie.setvalue（string.valueof（cookiecount));
thiscookie.setmaxage（1);
response.addcookie（thiscookie);
out.println（ " <p> 在最近10秒钟内，您访问此页面 "+thiscookie.getvalue（)+ "次 ");
}else{
out.println（ " <p> 在最近10秒钟内您没有访问此页面,或者您的浏览器不支持cookie! ");
}
out.println（ " </body> ");
out.println（ " </html> ");
out.close（);
}
//process the http post request
public void dopost（httpservletrequest request, httpservletresponse response) throws
servletexception, ioexception {
doget（request, response);
}
//clean up resources
public void destroy（) {
}
}
请各路高手给在下解释一下代码关键部分的意思,不胜感谢
尤其是为什么要判断2次cookiefound |
|
|
|
|
