Java实现的对称加密算法AES定义与用法详解

package com.imooc.security.aes;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class ImoocAES {
 private static String src = "cakin24 security aes";
 public static void main(String[] args) {
  jdkAES();
 }
 public static void jdkAES() {
  try {
   //生成KEY
   KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
   keyGenerator.init(128);
   SecretKey secretKey = keyGenerator.generateKey();
   byte[] keyBytes = secretKey.getEncoded();
   //key转换
   Key key = new SecretKeySpec(keyBytes, "AES");
   //加密
   Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
   cipher.init(Cipher.ENCRYPT_MODE, key);
   byte[] result = cipher.doFinal(src.getBytes());
   System.out.println("jdk aes encrypt : " + Base64.encodeBase64String(result));
   //解密
   cipher.init(Cipher.DECRYPT_MODE, key);
   result = cipher.doFinal(result);
   System.out.println("jdk aes desrypt : " + new String(result));
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}