class Jiamijiemi
{
public static void main(String[] args) throw Exception
{
File inFile = new File(文件名);
File outFile = new File(新文件名);
FileInputStream input = new FileInputStream(inFile);
FileOutputStream output = new FileOutputStream(outFile);
int content = 0;
while((content = input.read())!=-1){ //-1表示没有到末尾，就一直读取
output.write(content^40); //40是加密的数据,解密是用相同的方法
}
output.close();
input.close();
}
}
