import java.io.*; /**
* @Description:
* @projectName:JavaTest
* @see:PACKAGE_NAME
* @author:郑晓龙
* @createTime：2019/5/2 22:41
* @version：1.0
*/
public class CopyFile {
public static void main(String[] args) {
copy("d:/abc.txt","d:/def.txt");
} public static void copy(String source, String target) {
// 1、创建源
File src = new File(source);
File dest = new File(target); // 2、选择流
InputStream is = null;
OutputStream os = null;
try {
is = new FileInputStream(src);
os = new FileOutputStream(dest); // 3、操作流
byte[] buf = new byte[1024];
int len;
while ((len = is.read(buf)) != -1) {
os.write(buf, 0, len);
}
os.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
//4、关闭流（先打开的后关闭）
if (os != null) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}