1.如題，一次過(guò)來(lái)的請(qǐng)求在loginfilter里執(zhí)行了兩次，第一次獲取header為空，然后又進(jìn)入了一次loginfilter，卻可以獲得header的一個(gè)參數(shù)

2.filter類

public class LoginFilter implements Filter {

    @Autowired
    UserService userService;

    @Value("errorPage")
    String errorPage = "/auth/error.htm";

    //Logger logger = LoggerFactory.getLogger(this.getClass());

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        ServletContext servletContext = filterConfig.getServletContext();
        ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);
        userService = (UserService)ctx.getBean("userService");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
        throws IOException, ServletException {
        String path = ((HttpServletRequest)servletRequest).getServletPath();
        String tempUid = ((HttpServletRequest)servletRequest).getHeader("tempUid");
        //System.out.println(JSON.toJSONString(req.getHeaderNames()));
        //logger.info("path=" + path + " and tempUid = " + tempUid);
        if (path.indexOf("/auth/configValue") >= 0 ||
            path.indexOf("/user/code") >= 0) {
            // Filter 只是鏈?zhǔn)教幚恚?qǐng)求依然轉(zhuǎn)發(fā)到目的地址。
            filterChain.doFilter(servletRequest, servletResponse);
        } else if (StringUtils.hasLength(tempUid)){
            userService.checkAuth(tempUid);
            // Filter 只是鏈?zhǔn)教幚?，?qǐng)求依然轉(zhuǎn)發(fā)到目的地址。
            filterChain.doFilter(servletRequest, servletResponse);
        } else if (path.indexOf(errorPage) >= 0){
            // Filter 只是鏈?zhǔn)教幚?，?qǐng)求依然轉(zhuǎn)發(fā)到目的地址。
            filterChain.doFilter(servletRequest, servletResponse);
        } else {
            //logger.error("除獲取前端簽名和用戶信息，所有接口都必須帶tempUid！");
            //return;
            servletRequest.getRequestDispatcher(errorPage).forward(servletRequest, servletResponse);
        }
    }

    @Override
    public void destroy() {

    }
}

//filter配置
@Configuration
public class FilterConfig {

    @Bean
    public FilterRegistrationBean filterRegistration() {

        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new LoginFilter());
        registration.addUrlPatterns("/*");
        registration.setName("loginFilter");
        registration.setOrder(1);
        return registration;
    }

}

3.請(qǐng)求進(jìn)來(lái)的時(shí)候第一次獲取tempUid為null，第二次有值