springboot 攔截器或過濾器中注入bean

很多時候我們希望在攔截器或者過濾器中注入bean，但是springboot 默認是不能把相應的bean注入其中的，這個時候我們需要用以下的方式進行配置：

1，注入bean到攔截器中：

@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/*****");

    }

}

請注意紅色的部分

 

 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, 還有一種最直接的辦法：

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

以上就是注入bean到攔截器，過濾器的解決辦法

@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/*****");

    }

}