java编写将本程序的次数，上次运行程序的时间，上次运行的操作系统信息写入文件中

来源：互联网发布：剑三战阶积分算法编辑：程序博客网时间：2024/05/08 11:43

代码:

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileReader;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Properties;public class 实战4 {//类名为中文是可以的//计数器，将运行程序的次数，上次运行程序的时间，用户上次运行的操作系统写入文本文件中。()private static String input;private static int count;private static String time;private static String information;public static void main(String[] args) throws Exception {File file = new File("C:\\Users\\lenovo\\Desktop\\count.txt");    if(!file.exists()){file.createNewFile();}    //count= time=FileInputStream fis = new FileInputStream(file);byte[] buffer = new byte[1024];int length;while((length=fis.read(buffer))!=-1){input = new String(buffer,0,length);}if(input==null||input.trim().equals("")){count = 0;}else{String[] arr = input.split(";");count = Integer.parseInt(arr[0].substring(6, arr[0].length()));System.out.println("上次程序运行的次数:"+count);time = arr[1].substring(5, arr[1].length());System.out.println("上次程序运行的时间:"+time);System.out.println(arr[2]);}fis.close();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-ss hh:mm:ss");String time = sdf.format(new Date());//获得系统的相关信息Properties properties = System.getProperties();String osName = properties.getProperty("os.name"); //操作系统名称    String osArch = properties.getProperty("os.arch"); //操作系统构架    String osVersion = properties.getProperty("os.version"); //操作系统版本PrintWriter pw = new PrintWriter(file);count++;pw.write("count="+count+";");pw.write("time="+time+";");pw.write("information="+osName+" "+osArch+" "+osVersion);pw.close();}}

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