Springboot @ WebFilter failed to inject sample issues for other Bean
- 2021-11-13 01:38:35
- OfStack
Sample problem code:
@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);
}
}
Phenomena:
The local running test can pass, and the running injection bean is empty after going to the test environment
Phenomenon: It can be triggered when using external tomcat, but it has no problem when using internal tomcat locally
Resolution code
@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;
}
}
Startup class plus: @ ServletComponentScan ({"com. hybase. site. filter"})