AESEncrypter加密算法代码示例详解编程语言

* @Date 2014年3月26日 * @Comments （美国软件出口限制，AES算法，秘钥长度大于128位时需替换对应jdk版本的policy文件： ${java_home}/jre/lib/security/local_policy.jar 和 ${java_home}/jre/lib/security/US_export_policy.jar） public class AESEncrypter { private static final String ENCODEING = "UTF-8"; private static final String ALGORITHM = "AES"; private static final String KEY = "2016aes"; private static Cipher cipher_encrypt = null;//加密密码器 private static Cipher cipher_decrypt = null;//解密密码器 static{ try { KeyGenerator kgen = KeyGenerator.getInstance(ALGORITHM); SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" ); secureRandom.setSeed(KEY.getBytes()); kgen.init(128, secureRandom); //kgen.init(256, secureRandom);//256位长度秘钥 SecretKey secretKey = kgen.generateKey(); byte[] secretKeyEncoded = secretKey.getEncoded(); SecretKeySpec sks = new SecretKeySpec(secretKeyEncoded, ALGORITHM); cipher_encrypt = Cipher.getInstance(ALGORITHM); cipher_encrypt.init(Cipher.ENCRYPT_MODE, sks); cipher_decrypt = Cipher.getInstance(ALGORITHM); cipher_decrypt.init(Cipher.DECRYPT_MODE, sks); } catch (Exception e) { e.printStackTrace(); /** * 加密 * @param content 需要加密的内容 * @return public static String encrypt(String content) throws Exception{ byte[] result = cipher_encrypt.doFinal(content.getBytes(ENCODEING)); // return Base64.encodeBase64String(result); return new String(Base64.getEncoder().encode(result)); /** * 解密 * @param content * @return * @throws Exception public static String decrypt(String content) throws Exception { byte[] result = cipher_decrypt.doFinal(Base64.getDecoder().decode(content)); // byte[] result = cipher_decrypt.doFinal(Base64.decodeBase64(content)); return new String(result,ENCODEING); /** * 对字符串数组里的字符串加密 * @param content * @return * @throws Exception public static String[] encryptStrArray(String ...content) throws Exception{ for (int i = 0; i content.length; i++) { byte[] result = cipher_encrypt.doFinal(content[i].getBytes(ENCODEING)); // String encryptedStr = Base64.encodeBase64String(result); String encryptedStr = new String(Base64.getEncoder().encode(result)); content[i] = encryptedStr; return content;
public static void main(String[] args) throws Exception { String content = "公布修改五部法律"; //加密 System.out.println("加密前：" + content); String codeStr = encrypt(content); System.out.println("加密后：" + codeStr); System.out.println("加密后 length：" + codeStr.getBytes("UTF-8").length); //解密 String decryptResult = decrypt(codeStr); System.out.println("解密后：" + decryptResult); System.out.println("done!"); /** * 加密前：公布修改五部法律 加密后：B2Pu0KBO/FGuttUxSpT9/544jgp4OEoL8L4o4N85a0I= 加密后 length：44 解密后：公布修改五部法律 done! }

 

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