缓冲字符流 BufferedReader类与BufferedWriter类

                BufferedReader br=null;
		BufferedWriter bw=null;
		FileReader fr=null;
		FileWriter fw=null;
		try {
			fr = new FileReader("e:/abc.txt");
			br=new BufferedReader(fr);
			fw=new FileWriter("e:/c.txt");
			bw=new BufferedWriter(fw);
			
			String s="";
			while((s=br.readLine())!=null)
			{
				bw.write(s+"\r\n");
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally
		{
			try {
				br.close();
				bw.close();
				fr.close();
				fw.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}