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字节流复制文件
public static void main(String[] args) {
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
FileInputStream fis = new FileInputStream("c:\\from.txt");
bis = new BufferedInputStream(fis);
FileOutputStream fos =
new FileOutputStream("D:\\to.txt");
bos = new BufferedOutputStream(fos);
long len = bis.available();
if (len > 1024 * 1024 * 200) {
int b;
while ((b = bis.read()) != -1) {
bos.write(b);
}
}
else {
byte[] bytes = new byte[(int) len];
bis.read(bytes);
bos.write(bytes);
}
System.out.println("文件复制已经完成！");
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (bis != null) {
try {
bis.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
if (bos != null) {
try {
bos.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}
}