Java Spring Security OAuth2.0 通过token 获取用户信息(ID)

Spring OAuth2.0 通过token 获取用户信息--解密方式

Authentication(身份认证)

通过获取Spring 身份认证(Authentication)来获取用户信息,这种方式必须
①请求头中携带Authorization token
或
②请求参数中携带access_token =token 参数
才能有效获取用户信息

    String userId;//获取身份验证
    Authentication authentication = SecurityContextHolder.getContext().getAuthentication();if(authentication instanceofOAuth2Authentication){
        OAuth2Authentication oAuth2Authentication =(OAuth2Authentication)authentication;
        Object details = oAuth2Authentication.getUserAuthentication().getDetails();if(details ==null){
            log.error("获取用户信息失败！");thrownewUserException("获取用户信息失败！");}else{try{//获取用户详细信息
                Map<String,?> userInfo =(Map)details;
                userId= userInfo ==null?null: String.valueOf(userInfo.get("user_id"));}catch(Exception var5){
                log.error(var5.getMessage());thrownewClassCastException("类型转换异常");}}}

JwtHelper(token解密)

1）那我如果不使用常规传递模式，而使用自定义token参数名、或者其他渠道获取的token；
2）需要使用JwtHelper 进行解密；
示例代码中 使用的请求参数名就是 T，通过T 参数获取token 并且解密

//获取请求request
    ServletRequestAttributes attributes =(ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    HttpServletRequest request = attributes.getRequest();//获取token管理服务
    BearerTokenExtractor bearerTokenExtractor =newBearerTokenExtractor();//通过token管理提取token
    Authentication extract = bearerTokenExtractor.extract(request);
    Object principal =  extract ==null?null: extract.getPrincipal();//获取token
    String token;if(Objects.isNull(extract)){
    token = request.getParameter("T");//自定义参数token名称}else{
    token = String.valueOf(extract.getPrincipal());}//解析token
    Jwt jwt = JwtHelper.decode(token);
    String claimsStr = jwt.getClaims();
    Map<String, Object> claims = JsonParserFactory.create().parseMap(claimsStr);
    String userId = String.valueOf(claims.get("user_id"));