java奇怪的符号当使用基于字节的FileOutputStream时，基于字符的FileWriter是可以的

Question

任务：

Write a Java application that creates a file on your local file system which contains 10000 randomly generated integer values between 0 and 100000. Try this first using a byte-based stream and then instead by using a char-based stream. Compare the file sizes created by the two different approaches.

我制作了基于字节的流。在我运行这个程序之后，在文件输出中我得到了一些奇怪的符号。我做错什么了吗

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;

public class Bytebased {

    public static void main(String[] args) throws IOException {

    File outFile = new File( "fileOutput.txt" );
    FileOutputStream fos = new FileOutputStream(outFile);

    Random rand = new Random();
    int x;

    for(int i=1;i<=10001;i++){
         x = rand.nextInt(10001);
        fos.write(x);
    }
    fos.close();
    }
}

当我使用基于字符的流时，它可以工作：

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Random;

public class Charbased {

    public static void main(String[] args) throws IOException {

    File outFile = new File( "fileOutput2.txt" );
    FileWriter fw = new FileWriter(outFile);

    Random rand = new Random();
    int x;
    String y;
    for(int i=1;i<=10001;i++){
         x = rand.nextInt(10001);
         y=x + " ";
         fw.write(y);
    }

    fw.close();

    }
}

Answer 1

直接从FileOutputSream将常规输出写入文件将完成此操作，您需要首先将输出转换为字节。 比如：

public static void main(String[] args) throws IOException {

    File outFile = new File( "fileOutput.txt" );
    FileOutputStream fos = new FileOutputStream(outFile);

    String numbers = "";

    Random rand = new Random();

    for(int i=1;i<=10001;i++){
        numbers += rand.nextInt(10001);
    }

    byte[] bytesArray = numbers.getBytes();
    fos.write(bytesArray);
    fos.flush();
    fos.close();
}