基于springboot和redis实现单点登录

package com.example.demo.util;import com.google.common.base.Strings;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.spec.SecretKeySpec;import java.security.SecureRandom;/** * Create by zhuenbang on 2018/12/3 11:27 */public class AESUtil { private static final String defaultKey = "7bf72345-6266-4381-a4d3-988754c5f9d1"; /**  * @Description: 加密 * @Param:  * @returns: java.lang.String  * @Author: zhuenbang * @Date: 2018/12/3 11:33 */ public static String encryptByDefaultKey(String content) throws Exception { return encrypt(content, defaultKey); }  /**  * @Description: 解密  * @Param:  * @returns: java.lang.String  * @Author: zhuenbang * @Date: 2018/12/3 11:30 */ public static String decryptByDefaultKey(String encryptStr) throws Exception { return decrypt(encryptStr, defaultKey); } /** * AES加密为base 64 code * * @param content 待加密的内容 * @param encryptKey 加密密钥 * @return 加密后的base 64 code * @throws Exception */ public static String encrypt(String content, String encryptKey) throws Exception { return base64Encode(aesEncryptToBytes(content, encryptKey)); } /** * AES加密 * * @param content 待加密的内容 * @param encryptKey 加密密钥 * @return 加密后的byte[] * @throws Exception */ private static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception { KeyGenerator kgen = KeyGenerator.getInstance("AES"); SecureRandom random; if (System.getProperty("os.name").toLowerCase().contains("linux")) { random = SecureRandom.getInstance("SHA1PRNG"); } else { random = new SecureRandom(); } random.setSeed(encryptKey.getBytes()); kgen.init(128, random); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES")); return cipher.doFinal(content.getBytes("utf-8")); } /** * base 64 加密 * * @param bytes 待编码的byte[] * @return 编码后的base 64 code */ private static String base64Encode(byte[] bytes) { return new BASE64Encoder().encode(bytes); }  /** * 将base 64 code AES解密 * * @param encryptStr 待解密的base 64 code * @param decryptKey 解密密钥 * @return 解密后的string * @throws Exception */ public static String decrypt(String encryptStr, String decryptKey) throws Exception { return Strings.isNullOrEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey); }  /** * AES解密 * * @param encryptBytes 待解密的byte[] * @param decryptKey 解密密钥 * @return 解密后的String * @throws Exception */ private static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception { KeyGenerator kgen = KeyGenerator.getInstance("AES"); SecureRandom random; if (System.getProperty("os.name").toLowerCase().contains("linux")) { random = SecureRandom.getInstance("SHA1PRNG"); } else { random = new SecureRandom(); } random.setSeed(decryptKey.getBytes()); kgen.init(128, random); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES")); byte[] decryptBytes = cipher.doFinal(encryptBytes); return new String(decryptBytes); } /** * base 64 解密 * * @param base64Code 待解码的base 64 code * @return 解码后的byte[] * @throws Exception */ private static byte[] base64Decode(String base64Code) throws Exception { return Strings.isNullOrEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code); }}

@Override public String getToken(String userId) throws Exception { String token = AESUtil.encryptByDefaultKey(Joiner.on("_").join(userId, System.currentTimeMillis())); logger.debugv("token= {0}", token); redisService.set(UserKey.userAccessKey, userId, token); return token; }

 @Override public String checkToken(String token) throws Exception { String userId = AESUtil.decryptByDefaultKey(token).split("_")[0]; String currentToken = redisService.get(UserKey.userAccessKey, userId, String.class); logger.debugv("currentToken={0}", currentToken); if (StringUtils.isEmpty(currentToken)) {  return null; } if (!token.equals(currentToken)) {  return null; } return userId; }

 @Autowired AuthTokenService authTokenService; @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { if (handler instanceof HandlerMethod) {  HandlerMethod hm = (HandlerMethod) handler;  Secured secured = hm.getMethodAnnotation(Secured.class);  if (secured != null) {  String authToken = request.getHeader(UserConstant.USER_TOKEN);  if (StringUtils.isEmpty(authToken)) {   render(response, CodeMsg.REQUEST_ILLEGAL);   return false;  }  String userId = authTokenService.checkToken(authToken);  if (StringUtils.isEmpty(userId)) {   render(response, CodeMsg.LOGIN_FAILURE);   return false;  }  }  return true; } return true; }private void render(HttpServletResponse response, CodeMsg cm) throws Exception { response.setContentType("application/json;charset=UTF-8"); OutputStream out = response.getOutputStream(); String str = JSON.toJSONString(Result.error(cm)); out.write(str.getBytes("UTF-8")); out.flush(); out.close(); }

 /**  * @Description: 模拟登录  * @Param:  * @returns: com.example.demo.result.Result  * @Author: zhuenbang * @Date: 2018/12/3 12:05 */ @GetMapping("/login") public Result login() throws Exception { return authTokenService.login(); }   /**  * @Description: 模拟单点登录 @Secured这个方法拦截器会拦截 * @Param:  * @returns: com.example.demo.result.Result  * @Author: zhuenbang * @Date: 2018/12/3 12:35 */ @Secured @GetMapping("/testSSO") public Result testSSO() { return authTokenService.testSSO(); } 具体的实现 @Override public Result login() throws Exception { String userId = "123456"; return Result.success(this.getToken(userId)); } @Override public Result testSSO() { return Result.success("登录状态正常"); }