通过springMVC拦截器统一解析token，判断是否有效。可以对请求进行前置或后置处理

/**
 * 配置拦截器
 */
public class TokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //获取请求头
        String token = request.getHeader("Authorization");
        //使用工具类判断token是否有效
        /*boolean verifyToken = JwtUtils.verifyToken(token);
        //如果token失效，返回状态码401，拦截
        if(!verifyToken){
            response.setStatus(401);
            return false;
        }*/
        //如果token正常，放行

        //解析token，获取id和手机号码，构造User对象，存入ThredLocal
        Claims claims = JwtUtils.getClaims(token);
        Integer id = (Integer) claims.get("id");
        String mobile = (String) claims.get("mobile");

        User user=new User();
        user.setId(Long.valueOf(id));
        user.setMobile(mobile);

        UserHolder.set(user);

        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.remove();
    }

/**
 * 注册拦截器
 */
@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new TokenInterceptor())
                .addPathPatterns("/**")//添加拦截所有
                .excludePathPatterns(new String[]{"/user/login","/user/loginVerification"});//排除拦截
    }


}

//登陆时并无生成token，需进行排除

 

/**
 * 工具类：实现向threadlocal存储数据的方法
 */
public class UserHolder {

    //将用户对象存入ThreadLocal
    private static ThreadLocal<User> tl=new ThreadLocal<>();

    public static void set(User user){
        tl.set(user);
    }

    //从当前线程获取对象
    public static User get(){
        return tl.get();
    }
    //获取当前用户id
    public static Long getUserId(){
        return tl.get().getId();
    }
    //获取当前用户手机号
    public static String getMobile(){
        return tl.get().getMobile();
    }

    //清空threadlocal
    public static void remove(){
        tl.remove();
    }
}