aes - Java使用对称加密算法加密大文件内存资源消耗问题

Answer 1

Use CipherOutputStream

Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, key);

InputStream is = new FileInputStream(file);  
CipherOutputStream out = new CipherOutputStream(new FileOutputStream(dest), cipher)

IOUtils.copyLarge(is, out);