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java - 如何使我的 java 程序能够持续运行并定期执行?

转载 作者:行者123 更新时间:2023-12-01 22:50:10 25 4
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我编写了以下 java 部分,它获取纯文本文件,将其转换为 HTML 文件,然后将该文件通过 FTP 传输到 Web 服务器。由于纯文本源文件不断更新,我希望它能够半定期地持续运行。我研究过在 Windows XP 中使用任务计划程序(是的,我使用的是恐龙机器),但最常见的选项是每天一次。是否有一种有效/稍微简单的方法来使用 sleep 命令并且仅每 15 分钟/小时执行一次?

我包含了我的上下文代码:

import java.io.*;
import java.util.*;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import java.sql.Timestamp;

public class PrintOutConvosFtp2
{
public static void main(String[] args) throws IOException
{

//Read in the conversation log
BufferedReader reader = new BufferedReader(new FileReader("C:/Documents and Settings/Cuckoo/Desktop/Syss-convos.LOG"));
FileWriter output = new FileWriter("C:/Documents and Settings/Cuckoo/Desktop/Conversations.html");
List<String> lines = new ArrayList<String>();
String line = null;
while ((line = reader.readLine()) != null)
//remove some unnecessary clutter from the log
{
if (!(line.contains("just hung up!!!") || line.contains("just left the Realm.")
|| line.contains("Hurry, I've many esoteric secrets to divulge, and welcome to BaDbOy's realm.")
|| line.contains("For custom MegaMud paths and additional information, check out the website:")
|| line.contains("Syss gossips: Discuss new ideas/issues & see the most up to date information on Facebook!")
|| line.contains("Syss gossips: http://www.facebook.com/groups/EsotericEdits/")
|| line.contains("Syss gossips: MME Dats, Megamud path files and quest walkthroughs are available at my site")
|| line.contains("Syss gossips: www.esoteric-edits.fhero.net")
|| line.contains("telepaths: @")
|| line.contains("I'm a bot. Try telepathing me with @commands.")
|| line.contains("Syss gossips: Remember, you can telepath me @commands for useful things like adding lives.")
|| line.contains("Syss gossips: Bring a friend, help keep mud alive!")
|| line.contains("You say \"http://esoteric-edits.fhero.net/\"")
|| line.contains("For a list of available commands, you can telepath me with @commands.")))
{
//make the dates american style
String day = line.substring(0,2);
String month = line.substring(3,5);
lines.add(month + "/" + day + line.substring(5));
}


}
//initialize the output file with HTML header
output.write("<html>");
output.write(System.getProperty("line.separator") + "\t<head>");
output.write(System.getProperty("line.separator") + "\t\t<link type=\"text/css\" rel=\"stylesheet\" href=\"stylesheet.css\"/>");
output.write(System.getProperty("line.separator") + "\t\t<title>Esoteric Edits BBS - Conversation Log</title>");
output.write(System.getProperty("line.separator") + "\t</head>");
output.write(System.getProperty("line.separator") + "\t<body>"+ System.getProperty("line.separator") + System.getProperty("line.separator"));
output.write(System.getProperty("line.separator") + "<div id='cssmenu'>");
output.write(System.getProperty("line.separator") + "\t\t<center><img src=\"logo_10_2.png\">");
output.write(System.getProperty("line.separator") + "<ul>");
output.write(System.getProperty("line.separator") + "\t<li> <a href='index.html'><span>Home</span></a></li>");
output.write(System.getProperty("line.separator") + "\t<li> <a href='downloads.html'><span>Downloads</span></a></li>");
output.write(System.getProperty("line.separator") + "\t<li> <a href='Quests.html'><span>Quest Walkthroughs</span></a></li>");
output.write(System.getProperty("line.separator") + "\t<li> <a href='https://www.facebook.com/groups/EsotericEdits/'><span>Facebook</span></a></li>");
output.write(System.getProperty("line.separator") + "\t<li> <a href='captures.html'><span>Captures</span></a></li>");
output.write(System.getProperty("line.separator") + "\t<li class='last'> <a href='FAQs.html'><span>FAQs</span></a></li>");
output.write(System.getProperty("line.separator") + "</ul></center>");
output.write(System.getProperty("line.separator") + "</div><div id='mainpage'>");
output.write(System.getProperty("line.separator") + "<center><img src=\"divider.png\"></center>");

//write out a new file with HTML coloration
for (ListIterator<String> iter = lines.listIterator(); iter.hasNext(); )
{
String currentline = iter.next();
output.write("<b>"); //make everything bold
if (currentline.contains("gangpaths: "))
{
output.write(System.getProperty("line.separator") + "<font color=\"#808000\">" + currentline + "<br></font>");
}
else if (currentline.contains("gossips: ") || currentline.contains("auctions: "))
{
output.write(System.getProperty("line.separator") + "<font color=\"#FF00FF\">" + currentline + "<br></font>");
}
else if (currentline.contains("Broadcast from "))
{
output.write(System.getProperty("line.separator") + "<font color=\"yellow\">" + currentline + "<br></font>");
}
else if (currentline.contains("says \"") || currentline.contains("greets you.") || currentline.contains("bows deeply.")
|| currentline.contains("breaks into a wide grin.") || currentline.contains("You say \"")
|| currentline.contains("nods affirmatively.") || currentline.contains("grin slyly"))
{
output.write(System.getProperty("line.separator") + "<font color=\"green\">" + currentline + "<br></font>");
}
else
{
output.write(System.getProperty("line.separator") + currentline + "<br>");
}
}
//finalize the HTML footer
output.write(System.getProperty("line.separator") + "</b>");
output.write(System.getProperty("line.separator") + "</div>");
output.write(System.getProperty("line.separator") + "</body>");
output.write(System.getProperty("line.separator") + "\t</html>");
output.close(); //file is finalized locally

//Log file location for FTPs
Writer writer = new BufferedWriter(new FileWriter("C:/Documents and Settings/Cuckoo/Desktop/Convo-Upload.log", true));

//define variables for FTP process
String server = "servername";
int port = 21;
String user = "fake";
String pass = "password";

//begin FTP process to web server
FTPClient ftpClient = new FTPClient();
FileInputStream fis = null;
try {

File localFile = new File("C:/Documents and Settings/Cuckoo/Desktop/Conversations.html");
ftpClient.connect(server, port);
ftpClient.login(user, pass);
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
fis = new FileInputStream(localFile);
String remoteFile = "/public_html/Conversations.html";
ftpClient.storeFile(remoteFile, fis);
java.util.Date currentDate = new java.util.Date();
Timestamp currentTimestamp = new Timestamp(currentDate.getTime());
writer.append("Successfully uploaded file as of " + currentTimestamp.toString() + System.getProperty("line.separator"));
ftpClient.logout();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (fis != null) {
fis.close();
}
ftpClient.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}

writer.close(); //close the FTP logger
}
}

最佳答案

您可以让程序在执行其逻辑之间 hibernate 15 分钟。这样程序就会持续运行(不需要调度程序重新启动它),但它会在不执行任务时 hibernate 。当然,如果程序退出/崩溃,您需要以某种方式注意到并重新启动它。

基本上将其全部包装在一个 while 循环中,并在循环末尾添加一个 Thread.sleep(...);

关于java - 如何使我的 java 程序能够持续运行并定期执行?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24838725/

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