java 输入输出流练习题2

package com.hanqi.IO;
import java.io.*;
public class IoDemo {
    

    public static void main(String[] args) {
        File file=new File("d:/text.txt");
        try
        {
        FileInputStream fis=new FileInputStream(file);
        byte[]d=new byte[1024];
        fis.read(d);
        String str1=new String(d);
        System.out.println("读入的内容="+str1);
        
        fis.close();
        File file1=new File("d:/iodemo.txt");
        
        if(!file1.exists())
        {
            file1.createNewFile();
        }
        FileOutputStream fos=new FileOutputStream(file1);
        String str=str1;
        byte []b=str.getBytes();
        fos.write(b);
        fos.close();
        System.out.println("写入完成");
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

}