JAVA小练习143——使用缓冲输入输出字节流拷贝电子书-蒲公英云

JAVA小练习143——使用缓冲输入输出字节流拷贝电子书

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 Demo143 {
    public static void main(String[] args) throws IOException {
        long startTime = System.currentTimeMillis();
        //找到目标文件
        File inFile = new File("E:\\约翰克里斯朵夫.txt");
        File outFile = new File("E:\\拷贝.txt");
        //建立数据的输入输出通道
        FileInputStream fileInputStream = new FileInputStream(inFile);
        FileOutputStream fileOutputStream = new FileOutputStream(outFile);
        //建立缓冲输入输出字节流
        BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
        BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
        //边读边写
        int content = 0 ; 
        while((content = bufferedInputStream.read())!=-1){
            bufferedOutputStream.write(content);
            //bufferedOutputStream.flush();
        }
        //关闭资源
        bufferedOutputStream.close();
        bufferedInputStream.close();
        long endTime = System.currentTimeMillis();
        System.out.println(endTime-startTime);
    }
}