Java对称加密-AES2

package com.ponux.test;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;


public class AES {

    public static byte[] encrypt(String content, String keyWord) {
        try {
            if (keyWord == null) {
                System.out.print("Key为空null");
                return null;
            }
            if (keyWord.length() != 16) {
                System.out.print("Key长度不是16位");
                return null;
            }

            byte[] raw = keyWord.getBytes();
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//算法/模式/补码方式
            IvParameterSpec iv = new IvParameterSpec(new byte[16]);//使用CBC模式，需要一个向量iv，可增加加密算法的强度
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
            byte[] encrypted = cipher.doFinal(content.getBytes());

            return encrypted;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static byte[] decrypt(byte[] content, String keyWord) {
        try {
            // 判断Key是否正确
            if (keyWord == null) {
                System.out.print("Key为空null");
                return null;
            }
            // 判断Key是否为16位
            if (keyWord.length() != 16) {
                System.out.print("Key长度不是16位");
                return null;
            }

            byte[] raw = keyWord.getBytes(); // "ASCII"
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            IvParameterSpec iv = new IvParameterSpec(new byte[16]);
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

            byte[] original = cipher.doFinal(content);
            return original;

        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }

    public static void main(String[] args) throws Exception {
        String cKey = "1234567890123456";
        // 需要加密的字串
        String cSrc = "Email : arix04@xxx.com";
        System.out.println(cSrc);

        // 加密
        byte[] encrypted = AES.encrypt(cSrc, cKey);
        System.out.println("加密后 " + encrypted);

        // 解密
        byte[] origin = AES.decrypt(encrypted, cKey);
        System.out.println("解密后 " + new String(origin));
    }
}