springboot 拦截器或过滤器中注入bean

很多时候我们希望在拦截器或者过滤器中注入bean，但是springboot 默认是不能把相应的bean注入其中的，这个时候我们需要用以下的方式进行配置：

1，注入bean到拦截器中：

@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Bean
    public InterfaceAccessInterceptor interfaceAccessInterceptor(){
        return new InterfaceAccessInterceptor();

    }


    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(interfaceAccessInterceptor()).order(1) 
                .addPathPatterns("/**")
                .excludePathPatterns("/access/*****")
                .excludePathPatterns("/access/*****");

    }

}

请注意红色的部分

 

 2，注入bean到filter

@Configuration
public class FilterConfig {

    @Autowired
    private TestFilter testFilter;

    public FilterRegistrationBean filterRegistrationBean(){
        FilterRegistrationBean filterRegistrationBean=new FilterRegistrationBean();
        filterRegistrationBean.setFilter(testFilter);
        filterRegistrationBean.addUrlPatterns("/*****");
        filterRegistrationBean.setName("testFilter");
        return filterRegistrationBean;
    }
}

@Component
public class TestFilter implements Filter {

    @Autowired
    private TokenService tokenService;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest=(HttpServletRequest)servletRequest;
        tokenService.validateToken(httpServletRequest.getHeader("token"));
        filterChain.doFilter(servletRequest,servletResponse);
    }
}

3, 还有一种最直接的办法：

BeanFactory factory = WebApplicationContextUtils.getRequiredWebApplicationContext(request.getServletContext());
TokenService tokenService= (TokenService) factory.getBean("tokenService");

以上就是注入bean到拦截器，过滤器的解决办法

@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Bean
public InterfaceAccessInterceptor interfaceAccessInterceptor(){
        return new InterfaceAccessInterceptor();

    }


    @Override
public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(interfaceAccessInterceptor()).order(1)
                .addPathPatterns("/**")
                .excludePathPatterns("/access/*****")
                .excludePathPatterns("/access/*****");

    }

}