java加解密 + jwt的token

java加解密 + jwt的token 一、加解密 1、base64编码

		//基本加密
		String s = base64.getEncoder().encodeToString("qwe".getBytes());

---

//基本解密
		String s1 = new String(base64.getDecoder().decode(s));

2、aes加解密

		//基本加密
		KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
		keyGenerator.init(128,new SecureRandom("123".getBytes()));
		SecretKey secretKey = keyGenerator.generateKey();
		byte[] encoded = secretKey.getEncoded();
		SecretKeySpec key = new SecretKeySpec(encoded, "AES");
		Cipher aes1 = Cipher.getInstance("AES");
		aes1.init(Cipher.ENCRYPT_MODE,key);
		byte[] bytes = aes1.doFinal("要加密的内容".getBytes());

---

	//基本解密
			KeyGenerator kgen1 = KeyGenerator.getInstance("AES");
		kgen1.init(128, new SecureRandom("123".getBytes()));
		SecretKey secretKey1 = kgen1.generateKey();
		byte[] enCodeFormat1 = secretKey1.getEncoded();
		SecretKeySpec key1 = new SecretKeySpec(enCodeFormat1, "AES");
		Cipher cipher1 = Cipher.getInstance("AES");// 创建密码器
		cipher1.init(Cipher.DECRYPT_MODE, key1);// 初始化
		byte[] result1 = cipher1.doFinal(bytes);
		//切记不要直接输出byte[]也不toString();
		System.out.println(new String(result1));

RSA加密

//获取key
	KeyPairGenerator rsa = KeyPairGenerator.getInstance("RSA");
			rsa.initialize(1024);
			KeyPair keyPair = rsa.generateKeyPair();
			PrivateKey aPrivate = keyPair.getPrivate();
			System.out.println(aPrivate);
			PublicKey aPublic = keyPair.getPublic();
			System.out.println(aPublic);
//------------------------------------------------------------

			Cipher rsa1 = Cipher.getInstance("RSA");
			rsa1.init(Cipher.ENCRYPT_MODE,aPrivate);
			//加密
			byte[] bytes = rsa1.doFinal("私钥加密".getBytes());
			Cipher cipher = Cipher.getInstance("RSA");
			cipher.init(Cipher.DECRYPT_MODE,aPublic);
			//解密
			byte[] bytes1 = cipher.doFinal(bytes);

jwt的token

导入jar包

    io.jsonwebtoken
    jjwt
    0.9.1

生成token

			KeyGenerator aes = KeyGenerator.getInstance("AES");
			aes.init(128);
			SecretKey secretKey = aes.generateKey();
			Map claims = new HashMap<>();
			claims.put("userMobile", "186");
			claims.put("createDate", "2019-10-22");
			claims.put("userName", "name");
			claims.put("userCompany", "公司");
			claims.put("userCountry", "国家");

			long ttl = 60*1000;
			String token = Jwts.builder()
					.setClaims(claims)
					.setIssuedAt(new Date())
					.setExpiration(new Date(new Date().getTime() + ttl))
					.signWith(SignatureAlgorithm.HS256,secretKey) // 签名类型 与 密钥
					.compact();
			System.out.println(token);
			//解密
			Claims body = Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token).getBody();
			System.out.println(body.get("userName"));