Springboot @WebFilter无法注入其他Bean的示例问题

Springboot @WebFilter无法注入其他Bean的示例问题

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

@Component

public class AuthorizeFilter implements Filter {

@Autowired

private OtherBean otherBean;

@Override

publihttp://c 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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