字符缓冲流_字符流本身就带有缓冲区

特点:
字符缓冲流自带有缓冲区，大小为8192个字符，也就是16KB.
注意:
字符流只能拷贝纯文本文件.

        FileReader fr=new FileReader("lib/1.txt");
        BufferedReader br=new BufferedReader(fr);
        BufferedWriter bw=new BufferedWriter(new FileWriter("lib/5.txt"));
        int len;
        while ((len=br.read())!=-1)
        {
            bw.write(len);
        }
        fr.close();
        br.close();
        bw.close();
1
2
3
4
5
6
7
8
9
10
11

一次读取一行

        BufferedReader br=new BufferedReader(new FileReader("lib/1.txt"));
        BufferedWriter bw=new BufferedWriter(new FileWriter("lib/6.txt"));
        String str;
        while ((str=br.readLine())!=null)
        {
            bw.write(str);
            bw.newLine();
        }
        br.close();
        bw.close();
1
2
3
4
5
6
7
8
9
10