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Springboot @WebFilter无法注入其他Bean的实例问题

:0 :2021-12-30 21:35:16

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
@Component
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 {
        // false
  System.out.println(otherBean == null);
 }
}
@Configuration
public 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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