/**
* java把一个文件的内容复制到另外一个文件
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class FileInputOutputStreamTest {
public static void main(String[] args) {
File af = new File("a.txt");
File bf = new File("b.txt");
FileInputStream is = null;
FileOutputStream os = null;
if(!bf.exists()){
try {
bf.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
is = new FileInputStream(af);
os = new FileOutputStream(bf);
byte b[] = new byte[1024];
int len;
try {
len = is.read(b);
while (len != -1) {
os.write(b, 0, len);
len = is.read(b);
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}finally{
try {
if(is != null) is.close();
if(os != null) os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
