用字节流与字符流 分别实现文件内容的复制

1。字节流

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileOut2 {
    public static void main(String[] args) throws IOException {
        File file = new File("xx.txt");
        FileInputStream in = new FileInputStream(file);
        BufferedInputStream bif = new BufferedInputStream(in);
        int a = 0;
        byte[]  c= new byte[10]; // 字节流使用byte
        FileOutputStream out = new FileOutputStream("yy.txt");
        BufferedOutputStream bof = new BufferedOutputStream(out);

        while ((a = bif.read(c,0,10)) != -1){
            bof.write(c);
        }
        bof.flush();
        in.close();
        out.close();
    }
}

 

2。字符流

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class FileOut {
    public static void main(String[] args) throws IOException {
        File file = new File("xx.txt");
        FileReader in = new FileReader(file);
        BufferedReader bif = new BufferedReader(in); //缓冲输入流，
        int a = 0;
        char[]  c= new char[10]; //字符流使用char
        FileWriter out = new FileWriter("yy.txt");
        BufferedWriter bof = new BufferedWriter(out);

        while ((a = bif.read(c,0,10)) != -1){
            bof.write(c);
        }
        bof.flush();
        in.close();
        out.close();
    }
}

 

两者都使用了缓冲，流程如下：

读取的文件 --  输入流  --  缓冲输入流  -- 内存  --  缓冲输出流 -- 输出流  -- 写入的文件