java缓冲字符流，复制文件，逐个读取、写入

package cwj.bbb;

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


class StreamTest
{
	public static void main(String[] args) throws IOException
	{
		File file = new File("/home/cwjy1202/hadoop/javaTest/input02.txt");
		Reader br = new BufferedReader(new FileReader(file));
		Writer bw = new BufferedWriter(new FileWriter("/home/cwjy1202/hadoop/javaTest/input015.txt"));
		
		//逐个读取
		int len = br.read();
		while(-1 != len)
		{
			//逐个写入
			bw.write(len);
			//逐个读取
			len = br.read();
		}
		
		//刷新缓冲区，将缓冲区的数据强制写到目标文件中 
		bw.flush();
		bw.close();
		br.close();		
	}
}