Java——IO流(缓冲字节|字符 输入输出流)_5

1、缓冲字节输入输出流

package IOTest_6;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
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 TestBufferedInputStream {
	public static void main(String[] args) {
		long t1 = System.currentTimeMillis();
		File file = new File("测试.mp4");
		File path = new File("c.mp4");
		InputStream is = null;
		OutputStream os = null;
		try {
			is = new BufferedInputStream(new FileInputStream(file));
			os = new BufferedOutputStream(new FileOutputStream(path));
			int len = -1;
			byte[] b = new byte[1024];
			while((len = is.read(b))!=-1) {
				os.write(b);
			}
			os.flush();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			try {
				is.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
			try {
				os.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		long t2 = System.currentTimeMillis();
		System.out.println(t2-t1);
		
	}
}

2、缓冲字符输入输出流

package IOTest_6;

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

public class TestBufferedReader {
	public static void main(String[] args) {
		File file = new File("abc.txt");
		File path = new File("abc-copy.txt");
		BufferedReader br = null;
		BufferedWriter bw = null;
		try {
			br = new BufferedReader(new FileReader(file));
			bw = new BufferedWriter(new FileWriter(path));
			String str = null;
			while((str = br.readLine()) != null) {
				bw.write(str);
				bw.newLine();
			}
			bw.flush();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			try {
				br.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}