使用日期和时间创建文件名 [英] Create file name using date and time

问题描述

我希望你可以帮助我，我试图在另一个课程的日期打电话，看起来像2011-03-09 06-57-40，我想使用这个创建下面的文件，但每次当输出运行它时，它会在重新运行调用dat（）时创建一个新文件。我知道发生了什么问题我只是不知道如何解决它，我想彻底地写到同一个文件。我希望这是有道理的？ ：/

感谢您提前提供任何帮助：）

  date d = new date（）; 
 String cdate = d.date（）; 
 
 
 String f = h; 
 
 try {
 PrintWriter out = new PrintWriter（new BufferedWriter（new FileWriter（cdate +.tsv，true）））; 
 out.print（f）; 
 out.print（\t）; 
 out.close（）; 
} catch（IOException e）{
} 
  

解决方案

创建一个名为当前日期/时间的文件：

  Date date = new Date（）; 
 SimpleDateFormat dateFormat = new SimpleDateFormat（yyyy-MM-dd HH-mm-ss）; 
文件文件= new File（dateFormat.format（date）+.tsv）; 
 BufferedWriter out = new BufferedWriter（new FileWriter（file））; 
 out.write（写入文件）; 
 out.close（）; 
  

I hope you could help me, I'm trying to call in the date from another class and looks like "2011-03-09 06-57-40", I want to use this to create the file below but everytime I do when the output runs it creates a new file as it re-runs calling the dat(). I know what's going wrong I'm just not sure how to fix it, I want to permently writw to the same file. I hope this makes sense? :/

Thank you for any help in advance :)

    date d = new date();
    String  cdate = d.date();


    String f = h;

    try{
        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(cdate + ".tsv", true)));
        out.print(f);
        out.print("\t");
        out.close();
    }catch (IOException e){
    }

解决方案

To create a file named the current date/time:

Date date = new Date() ;
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss") ;
File file = new File(dateFormat.format(date) + ".tsv") ;
BufferedWriter out = new BufferedWriter(new FileWriter(file));
out.write("Writing to file");
out.close();

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