package kehouzuoye28_5;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class copy_5 {
public static void main(String[] args) throws IOException {
long starTime1 = System.currentTimeMillis();
copy1();
long endTime1 = System.currentTimeMillis();
System.out.println(endTime1-starTime1);//1复制完毕 用时：59312毫秒
long starTime2 = System.currentTimeMillis();
copy2();
long endTime2 = System.currentTimeMillis();
System.out.println(endTime2-starTime2);//2复制完毕 用时110毫秒
long starTime3 = System.currentTimeMillis();
copy3();
long endTime3 = System.currentTimeMillis();
System.out.println(endTime3-starTime3);//3复制完毕 用时93毫秒
long starTime4 = System.currentTimeMillis();
copy4();
long endTime4= System.currentTimeMillis();
System.out.println(endTime4-starTime4);//4复制完毕 用时32毫秒
}
public static void copy1() throws IOException{
FileInputStream fis = new FileInputStream("E:\\Demo\\手心里的温柔.mp3");
FileOutputStream fos = new FileOutputStream("E:\\Demo\\手心里的温柔1.mp3");
int len = fis.read();
while(len!=-1) {
fos.write(len);
len=fis.read();
}
System.out.println("1复制完毕");
fos.close();
fis.close();
}
public static void copy2() throws IOException{
FileInputStream fis = new FileInputStream("E:\\Demo\\手心里的温柔.mp3");
FileOutputStream fos = new FileOutputStream("E:\\Demo\\手心里的温柔2.mp3");
byte[] arr = new byte[1024];
int len = 0;
while((len=fis.read(arr))!=-1){
fos.write(arr, 0, len);
}
System.out.println("2复制完毕");
fos.close();
fis.close();
}
public static void copy3() throws IOException{
BufferedInputStream bis = new BufferedInputStream(new FileInputStream("E:\\Demo\\手心里的温柔.mp3"));
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("E:\\Demo\\手心里的温柔3.mp3"));
int len = 0;
while((len=bis.read())!=-1){
bos.write(len);
}
System.out.println("3复制完毕");
bos.close();
bis.close();
}
public static void copy4() throws IOException{
BufferedInputStream bis = new BufferedInputStream(new FileInputStream("E:\\Demo\\手心里的温柔.mp3"));
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("E:\\Demo\\手心里的温柔4.mp3"));
byte[] bytes = new byte[1024];
int len = 0;
while((len=bis.read(bytes))!=-1){
bos.write(bytes, 0, len);
}
System.out.println("4复制完毕");
bos.close();
bis.close();
}
}
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