流技术读写文件

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class TestFileInputStream{
    public static void main(String[] args){
        InputStream in =null;
        OutputStream out = null;
        try{
            in = new FileInputStream("D:\\java\\TestFileInputStream.java");
            out = new FileOutputStream("D:\\TestFileInputStream.java");
        } catch(FileNotFoundException e){
            System.out.println("找不到指定文件");
            System.exit(-1);
        }

        try{
            long num = 0;
            int b = 0;
            while((b=in.read()) != -1){
                out.write(b);               
                System.out.print((char) b);
                num++;
            }
            in.close();
            System.out.println();
            System.out.println("共读了："+num+"个字符");
        }catch(IOException e1){
            System.out.println("文件读取错误");
            System.exit(-1);
        }
    }
}

转载于:https://www.cnblogs.com/sail_out_to_sea/archive/2010/10/31/1865501.html