public static void main(String[] args) throws Exception {
        String key = "test";
        String src = "111";
        
        SecretKey deskey = null;
        
        String Algorithm = "DESede"; // 加密算法
        KeyGenerator gen = KeyGenerator.getInstance(Algorithm);   //实例化(对称加密)密钥生成器
        
        //或用做"IBMSecureRandom",提供强加密随机数生成器
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");  
        
        secureRandom.setSeed(key.getBytes());// 重新设置此随机对象的种子。
        
        deskey =  gen.generateKey();  //生成 密钥
        
        gen = null;//将密钥生成器置空，gc回收
        System.out.println("密钥：" + deskey.toString());
        //============================================= 生成密钥
        
        //实例化(为加密和解密提供密码功能)
        Cipher c1 = Cipher.getInstance(Algorithm + "/ECB/PKCS5Padding");  
        
        c1.init(Cipher.ENCRYPT_MODE, deskey);   //设置加密模式
        
        byte[] encoded = c1.doFinal(src.getBytes("UTF-8"));   //执行加密
        //import org.bouncycastle.util.encoders.Base64;
        String destCode = new String(Base64.encode(encoded));   //Base64编码 密文
        //============================================= 生成密文
        
        System.out.println("密文："+destCode.toString());
        
    }