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FileInputStream fis = new FileInputStream(new File("C:\\文件1.txt"));
FileOutputStream fos = new FileOutputStream(new File("C:\\文件2.txt"));
int i=0;
byte[] buffer = new byte[2];
while ((i = fis.read(buffer)) > 0) {
fos.write(buffer, 0, i);
}
fis.close();
fos.close();