如何在文本文件中写入多个ArrayList [英] How to write multiple ArrayList in a text file

问题描述

在下面的代码中，我正在尝试创建一个txt文件，并且我想在其中添加一些值列表. 因此，在这里，我的方法是在文件不存在的情况下创建一个新文件，并向其中添加各个元素.

In below code , i'm trying to create a txt file and there i want to add some list of values. So here my approach is create a new file if file is not present and add the respective elements into it.

请参阅下面的内容，我无法获得预期的输出，因此，您能为我提供一些帮助吗，这将非常有帮助

Please see below , i'm unable to get my expected output, So can you help me with some idea so it will be very helpful

   public class MyTest {

    public static void main(String[] args) throws Exception  {
        // TODO Auto-generated method stub
        SftpConn sftp = new SftpConn();
        //sftp.sftpGetConnect();
        List<String> list =  new ArrayList<>();
        list.add("AAAA");
        list.add("BBBB");
        list.add("CCCC");
        sftp.writeIntoText(list);
        List<String> list1 =  new ArrayList<>();
        list1.add("AAAA1111");
        list1.add("BBBB2222");
        list1.add("CCCC2222");
        sftp.writeIntoText(list1);
    }
        
    }




 public class SftpConn
      {
    public void writeIntoText(List<String> result) throws Exception
        {
                    connect();
                    List<String> resultdata= result;
                    System.out.println("Result Updated");
                    channelSftp = (ChannelSftp) session.openChannel("sftp");
                    channelSftp.connect();
                    fileOutStream = channelSftp.put("/home/dasrsoum/RM.txt");
                    PrintWriter writer = new PrintWriter(fileOutStream,true);
                    writer.println("------------------");
                    for (String value : resultdata) {
                        writer.println(value+ System.lineSeparator());
                        System.out.println(value);
                    
                    }
                    
            
            writer.close();
   }

实际输出

 AAAA1111
   BBBB2222
   CCCC2222

OutPut除外

  AAAA
  BBBB
  CCCC
  AAAA1111
  BBBB2222
  CCCC2222

推荐答案

您的第一个文件被第二次调用该函数覆盖

You first file is overwritten by the second call to the function

这篇关于如何在文本文件中写入多个ArrayList的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！