问Java在通过Windows远程桌面(tsclient)写入时会创建巨大的文件

EN

import static java.nio.file.StandardOpenOption.APPEND;
import static java.nio.file.StandardOpenOption.CREATE;
import static java.nio.file.StandardOpenOption.TRUNCATE_EXISTING;
import static java.nio.file.StandardOpenOption.WRITE;

import java.io.BufferedWriter;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.nio.file.Files;
import java.nio.file.OpenOption;
import java.util.Collections;

/**
 * Demonstrates weird issue when writing (appending) to a file over TsClient (Microsoft Remote Desktop).
 * 
 * @author Martin
 */
public class WriteOverTsClientDemo
{
    private static final File FILE_TO_WRITE = new File("\\\\tsclient\\C\\Temp\\TestFile.txt");
    //private static final File FILE_TO_WRITE = new File("C:\\Temp\\TestFile.txt");

    private static final String ROW_DATA = "111111111122222222223333333333444444444555555555566666666667777777777888888888899999999990000000000";

    public static void main(String[] args) throws IOException
    {
        if (!FILE_TO_WRITE.getParentFile().exists())
        {
            throw new RuntimeException("\nPlease create directory C:\\Temp\\ on your local machine and run this application via RemoteDesktop with C:\\ as a 'Local resource'.");
        }
        FILE_TO_WRITE.delete();
        new WriteOverTsClientDemo().execute();
    }

    private void execute() throws IOException
    {
        System.out.println("Writing to file: " + FILE_TO_WRITE);
        System.out.println();

        for (int i = 1; i <= 10; i++)
        {
            System.out.println("Writing batch " + i + "...");
            writeDataToFile(i);
            System.out.println("Size of file after batch " + i + ": " + FILE_TO_WRITE.length());
            System.out.println();
        }
        System.out.println("Done!");
    }

    private void writeDataToFile(int batch) throws IOException
    {
        Charset charset = Charset.forName("UTF-8");
        CharsetEncoder encoder = charset.newEncoder();

        try(OutputStream out = Files.newOutputStream(FILE_TO_WRITE.toPath(), CREATE, WRITE, getTruncateOrAppendOption(batch));
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, encoder)))
        {
            writeData(batch, writer);
        }
    }

    private void writeData(int batch, BufferedWriter writer) throws IOException
    {
        for (String data : createData())
        {
            writer.append(Integer.toString(batch));
            writer.append(" ");
            writer.append(data);
            writer.append("\n");
        }
    }

    private Iterable<String> createData()
    {
        return Collections.nCopies(100, ROW_DATA);
    }

    /**
     * @return option to write from the beginning or from the end of the file
     */
    private OpenOption getTruncateOrAppendOption(int batch)
    {
        return batch == 1 ? TRUNCATE_EXISTING : APPEND;
    }
}