Springboot @WebFilter无法注入其他Bean的示例分析

Springboot @WebFilter无法注入其他Bean的示例分析，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

示例问题代码：

@WebFilter(filterName = "authorizeFilter", urlPatterns = {"*.htm", "*.html"}, asyncSupported = true)public class AuthorizeFilter implements Filter {        @Autowired        private OtherBean otherBean;        @Override    public void init(FilterConfig filterConfig) throws ServletException {    }    @Override    public void destroy() {    }    @Override    public void doFilter(ServletRequest request, ServletResponse response,                         FilterChain chain) throws IOException, ServletException {        // true                System.out.println(otherBean == null);        }}

现象：

本地运行测试均可通过，上测试环境后运行注入bean为空
现象：使用外置tomcat可触发，本地使用内置tomcat则无此问题

解决代码

@Componentpublic class AuthorizeFilter implements Filter {        @Autowired        private OtherBean otherBean;        @Override    public void init(FilterConfig filterConfig) throws ServletException {    }    @Override    public void destroy() {    }    @Override    public void doFilter(ServletRequest request, ServletResponse response,                         FilterChain chain) throws IOException, ServletException {        // false                System.out.println(otherBean == null);        }}

@Configurationpublic class WebFilterConfig implements WebMvcConfigurer {    @Autowired    private AuthorizeFilter authorizeFilter;    @Bean("authorizeFilterBean")    public FilterRegistrationBean authorizeFilterBean() {        FilterRegistrationBean registration = new FilterRegistrationBean();        registration.setFilter(authorizeFilter);        registration.addUrlPatterns(new String[]{"*.htm", "*.html"});        registration.setName("authorizeFilter");        registration.setAsyncSupported(true);        return registration;    }}

启动类加上：@ServletComponentScan({"com.hybase.site.filter"})

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