首先,是的,我是从网络浏览器调用它的。这是一段相当长的代码,但我已尝试尽可能缩短它。
基本上,循环中的每次迭代我都需要等待 1 秒。几乎尝试了所有方法(.sleep() 等),但它似乎并没有暂停。我需要这样做的原因是因为 SimpleSocketClient 正在调用一个每秒允许的下限的套接字。
@Override
public String execute(HttpServletRequest request, HttpServletResponse response) {
String forwardToJsp = null;
HttpSession session = request.getSession();
String allUrls = request.getParameter("domains");
ArrayList domainList = new ArrayList<String>();
Scanner sc = new Scanner(allUrls);
while (sc.hasNextLine()) {
String line = sc.nextLine();
domainList.add(line);
// process the line
}
sc.close();
String pageHtml = null;
String domain = "";
String status = "";
String registrant = "";
String dates = "";
String tag = "";
String email = "";
ArrayList domains = new ArrayList<Domain>();
Domain theDomain;
String ipAddress = request.getHeader("X-FORWARDED-FOR");
if (ipAddress == null) {
ipAddress = request.getRemoteAddr();
}
for (int i = 0; i < domainList.size(); i++) {
//NEED TO WAIT 1 SECOND HERE / ANYWHERE IN LOOP
String singleDomain = domainList.get(i).toString();
SimpleSocketClient tester = new SimpleSocketClient(singleDomain,ipAddress);
pageHtml = tester.getResult();
try {
String whoIs2 = ipAddress + " " + ipAddress + " " + singleDomain + "\r\n";
byte[] data = whoIs2.getBytes();
//details of each domain
//domain name
domain = singleDomain;
//status
status = "FTR";
//registrant
registrant = "N/A";
//dates
dates = "N/A";
//tag
tag = "N/A";
//email
email = "N/A";
}
} catch (Exception e) {
Logger.getLogger("ip is " + ipAddress + bulkWhoIsCommand.class.getName()).log(Level.SEVERE, null, e);
forwardToJsp = "index.jsp";
return forwardToJsp;
}
//single one
theDomain = new Domain(domain,status,registrant,dates,tag,email);
//now add to arrayList
domains.add(theDomain);
// try {
// Thread.sleep(230000);
// } catch (InterruptedException ex) {
// Logger.getLogger(bulkWhoIsCommand.class.getName()).log(Level.SEVERE, null, ex);
// }
// try {
// pause.poll(100 * 300, TimeUnit.MILLISECONDS);
// } catch (InterruptedException ex) {
// Logger.getLogger(bulkWhoIsCommand.class.getName()).log(Level.SEVERE, null, ex);
// }
}
编辑 - friend 建议使用 ajax 来轮询更新,但肯定有一种只使用 java 的方法。
最佳答案
你可以尝试在while循环中设置一个while循环,来暂停它。应该像这样:
while(!done)
{
long start = System.currentTimeMillis();
while(System.currentTimeMillis() - start < 1000L){}
}
没有测试过,但方法很重要。我有一个想法将两者结合起来。因此,每次 Thread.Sleep() 崩溃时,您都必须进行循环。像这样的事情:
while(!done)
{
long start = System.currentTimeMillis();
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
System.err.println(e);
}
while(System.currentTimeMillis() - start < 1000L){}
}
当 Thread.Sleep() 工作时,它只会被调用一次。否则你需要一些CPU时间。可能是cpu经济版。
关于java - 甚至可以让这个循环每次等待几秒钟吗?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23915838/