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| package Java0326.Lecture15.FileIO;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/*
* IOdata/dog.jpg => IOdata/dog2.jpg 복사
* 기계입장 :입력장치 출력장치
*
* <작업순서>
* 1. Stream open
* 2. read/write
* 3. Stream close
*/
public class FileIOMain02 {
public static void main(String[] args) {
FileInputStream fis = null;
FileOutputStream fos = null;
try {
long start = System.currentTimeMillis();
// 1. Stream open
fis = new FileInputStream("Iodata/dog.jpg");
fos = new FileOutputStream("Iodata/dog2.jpg");
// FileInputStream fis = new FileInputStream("Iodata/dog.jpg");
// FileOutputStream fos = new FileOutputStream("Iodata/dog2.jpg");
// 2. read/write
while(true) {
int c = fis.read();
if(c == -1) break;
fos.write(c);
}
long end = System.currentTimeMillis();
System.out.println("복사완료!");
// while(true); // 외부에서 lock이 걸려있기때문에 파일이 0바이트로 나옴
System.out.println("소요시간 : " + (end - start)/1000. + "초");
} catch(Exception e) {
e.printStackTrace();
} finally {
// 3. Stream close
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
|
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| package Java0326.Lecture15.FileIO;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class FileIOMain03 {
// dog.jgp => dog3.jpg 복사
public static void main(String[] args) {
FileInputStream fis = null;
BufferedInputStream bis = null;
FileOutputStream fos = null;
BufferedOutputStream bos = null;
try {
long start = System.currentTimeMillis();
fis = new FileInputStream("Iodata/dog.jpg");
fos = new FileOutputStream("Iodata/dog.jpg");
// 버퍼사용 객체연결
bis = new BufferedInputStream(fis);
bos = new BufferedOutputStream(fos);
// 복사수행
while(true) {
int c = bis.read();
if(c == -1)break;
bos.write(c);
}
long end = System.currentTimeMillis();
System.out.println("복사완료!");
System.out.println("소요시간 : " + (end - start)/1000. + "초");
} catch(Exception e) {
e.printStackTrace();
} finally {
FileClose.close(bis, fis);
FileClose.close(bos, fos);
/*
FileClose.close(bis);
FileClose.close(bos);
FileClose.close(fis);
FileClose.close(fos);
*/
/*
if(bis != null) {
try {
bis.close();
} catch(Exception e) {
e.printStackTrace();
}
}
if(bos != null) {
try {
bos.close();
} catch(Exception e) {
e.printStackTrace();
}
}
if(fis != null) {
try {
fis.close();
} catch(Exception e) {
e.printStackTrace();
}
}
if(fos != null) {
try {
fos.close();
} catch(Exception e) {
e.printStackTrace();
}
}
*/
}
}
}
|
