import java.io.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;

public class MakeFile {
    public static void main(String[] args) throws IOException {
        Long startTime = 1551434400000L; 	// 开始时间
        Long endTime = 1637920800000L; 		// 结束时间
        String basePath = "/home/backup/"; 	// 文件基础目录
        while(startTime <= endTime) {
            // 获取时间字符串
            Date date = new Date(startTime);
            DateFormat formatter = new SimpleDateFormat("YYYY-MM-dd HH:mm:ss");
            formatter.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
            String dateStr = formatter.format(date);
            //更新系统时间
            String cmdChangeTime = "date -s \"" + dateStr + "\"";
            executeNewFlow(Collections.singletonList(cmdChangeTime));
            System.out.println(cmdChangeTime);
            String cmdMakeFile = "mkdir -p " + basePath + dateStr.substring(0,4) + "/" +  dateStr.substring(0,10);
            executeNewFlow(Collections.singletonList(cmdMakeFile));
            System.out.println(cmdMakeFile);
            startTime += 7*24*3600*1000;
        }
    }

    /**
     * java 执行 linux 指令方法 executeNewFlow(Collections.singletonList("cd /home")); 通过这种方式调用指令
     * @param commands
     * @return
     */
    public static List<String> executeNewFlow(List<String> commands) {
        List<String> rspList = new ArrayList<String>();
        Runtime run = Runtime.getRuntime();
        try {
            Process proc = run.exec("/bin/bash", null, null);
            BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
            PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(proc.getOutputStream())), true);
            for (String line : commands) {
                out.println(line);
            }
            out.println("exit");// 这个命令必须执行，否则in流不结束。
            String rspLine = "";
            while ((rspLine = in.readLine()) != null) {
                System.out.println(rspLine);
                rspList.add(rspLine);
            }
            proc.waitFor();
            in.close();
            out.close();
            proc.destroy();
        } catch (IOException e1) {
            e1.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return rspList;
    }
}