That's because Spring isn't managing your PagePopulationInterceptor instance. You are creating it yourself in the below （拦截器内使用@Autowired时出现了null，这是由于你的spring对象注入时机在你的拦截器之后了）That's because Spring isn't managing your PageP
阅读背景：
HandlerInterceptor里@Autowired对象为空的解决方法
来源：互联网
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