用Java加密文本文件的最简单方法

试试这个，…很简单

import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;public class HelloWorld{    public static void main(String[] args) {        try{ KeyGenerator keygenerator = KeyGenerator.getInstance("DES"); SecretKey myDesKey = keygenerator.generateKey(); Cipher desCipher; desCipher = Cipher.getInstance("DES"); byte[] text = "No body can see me.".getBytes("UTF8"); desCipher.init(Cipher.ENCRYPT_MODE, myDesKey); byte[] textEncrypted = desCipher.doFinal(text); String s = new String(textEncrypted); System.out.println(s); desCipher.init(Cipher.DECRYPT_MODE, myDesKey); byte[] textDecrypted = desCipher.doFinal(textEncrypted); s = new String(textDecrypted); System.out.println(s);        }catch(Exception e)        { System.out.println("Exception");        }    }}

因此，基本上，在写入文件之前，您需要加密，而在读取文件之后，需要解密。