项目场景：
在系统开发的过程中有的时候，我们为了数据的安全性会把前端的数据进行加密，然后再在后端程序中对加密数据进行解密或解密，今天我们就在这里说2种简单的方法（DES加密、base64编码）
具体实现方案：
我们在前端页面进行加密的时候需要用到JavaScript加密库CryptoJS v3.1.2 下载链接
页面代码：
1、DES加密
<script th:src="@{/lib/CryptoJS v3.1.2/rollups/tripledes.js}" charset="utf-8"></script><script th:src="@{/lib/CryptoJS v3.1.2/components/mode-ecb.js}" charset="utf-8"></script><script type="text/javascript">/*** @Title des加密* @Author YangWanJie* @Date /12/10 16:36* message 加密文本内容* key加密的盐* @versioin V1.0**/$.fn.encryptByDES = function (message, key) {var keyHex = CryptoJS.enc.Utf8.parse(key);var encrypted = CryptoJS.DES.encrypt(message, keyHex, {mode: CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});return encrypted.toString();};</script>
java后端解密：
import java.io.IOException;import java.security.SecureRandom;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;/*** @Title DES加密 解密算法* @Author YangWanJie* @Date /5/21 17:02* @versioin V1.0**/public class DesUtils {private final static String DES = "DES";//方式private final static String ENCODE = "UTF-8";//编码private final static String defaultKey = "admin";//秘钥/*** @Title 使用 默认key 加密* @Author YangWanJie* @Date /5/21 17:02* @versioin V1.0**/public static String encrypt(String data) throws Exception {byte[] bt = encrypt(data.getBytes(ENCODE), defaultKey.getBytes(ENCODE));String strs = new BASE64Encoder().encode(bt);return strs;}/*** @Title 使用 默认key 解密* @Author YangWanJie* @Date /5/21 17:02* @versioin V1.0**/public static String decrypt(String data) throws IOException, Exception {if (data == null) {return null;}BASE64Decoder decoder = new BASE64Decoder();byte[] buf = decoder.decodeBuffer(data);byte[] bt = decrypt(buf, defaultKey.getBytes(ENCODE));return new String(bt, ENCODE);}/*** @Title 根据键值进行加密* @Author YangWanJie* @Date /5/21 17:03* @versioin V1.0**/public static String encrypt(String data, String key) throws Exception {byte[] bt = encrypt(data.getBytes(ENCODE), key.getBytes(ENCODE));String strs = new BASE64Encoder().encode(bt);return strs;}/*** @Title 根据键值进行解密* @Author YangWanJie* @Date /5/21 17:03* @versioin V1.0**/public static String decrypt(String data, String key) throws IOException,Exception {if (data == null) {return null;}BASE64Decoder decoder = new BASE64Decoder();byte[] buf = decoder.decodeBuffer(data);byte[] bt = decrypt(buf, key.getBytes(ENCODE));return new String(bt, ENCODE);}/*** @Title 根据键值进行加密* @Author YangWanJie* @Date /5/21 17:04* @versioin V1.0**/private static byte[] encrypt(byte[] data, byte[] key) throws Exception {// 生成一个可信任的随机数源SecureRandom sr = new SecureRandom();// 从原始密钥数据创建DESKeySpec对象DESKeySpec dks = new DESKeySpec(key);// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);SecretKey securekey = keyFactory.generateSecret(dks);// Cipher对象实际完成加密操作Cipher cipher = Cipher.getInstance(DES);// 用密钥初始化Cipher对象cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);return cipher.doFinal(data);}/*** @Title 根据键值进行解密* @Author YangWanJie* @Date /5/21 17:04* @versioin V1.0**/private static byte[] decrypt(byte[] data, byte[] key) throws Exception {// 生成一个可信任的随机数源SecureRandom sr = new SecureRandom();// 从原始密钥数据创建DESKeySpec对象DESKeySpec dks = new DESKeySpec(key);// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);SecretKey securekey = keyFactory.generateSecret(dks);// Cipher对象实际完成解密操作Cipher cipher = Cipher.getInstance(DES);// 用密钥初始化Cipher对象cipher.init(Cipher.DECRYPT_MODE, securekey, sr);return cipher.doFinal(data);}}
2、前端base64编码
$.base64.encode('要被编码的文本内容');
Java后端解码
import mons.codec.binary.Base64;/*** @Title base64 编码与解码* @Author YangWanJie* @Date /6/24 19:38* @versioin V1.0**/public class Base64Code {/*** @Title base64 编码* @Author YangWanJie* @Date /6/24 19:37* @versioin V1.0**/public static String encode(byte[] bytes) {return new String(Base64.encodeBase64(bytes));}/*** @Title base64 解码* @Author YangWanJie* @Date /6/24 19:37* @versioin V1.0**/public static String decode(byte[] bytes) {return new String(Base64.decodeBase64(bytes));}}
