content: package com.cf.framework.utils;
  
  import com.alibaba.fastjson.JSON;
  import org.apache.commons.lang3.StringUtils;
  import org.springframework.security.jwt.Jwt;
  import org.springframework.security.jwt.JwtHelper;
  
  import javax.servlet.http.HttpServletRequest;
  import java.util.Map;
  
  /**
   * Created by mrt on 2020/5/25.
   */
  public class Oauth2Util {
  
      public static Map<String,String> getJwtClaimsFromHeader(HttpServletRequest request) {
          if (request == null) {
              return null;
          }
          //取出头信息
          String authorization = request.getHeader("Authorization");
          if (StringUtils.isEmpty(authorization) || authorization.indexOf("Bearer") < 0) {
              return null;
          }
          //从Bearer 后边开始取出token
          String token = authorization.substring(7);
          Map<String,String> map = null;
          try {
              //解析jwt
              Jwt decode = JwtHelper.decode(token);
              //得到 jwt中的用户信息
              String claims = decode.getClaims();
              //将jwt转为Map
              map = JSON.parseObject(claims, Map.class);
          } catch (Exception e) {
              e.printStackTrace();
          }
          return map;
      }
  }
  