web filter cannot read Property file in spring boot - spring-boot

Question

I have simple ip filter, which will filter ips not in white list.
The code is simple, like
#EnableConfigurationProperties(AppProperties.class)
public class ClientIpFilter implements Filter {
#Autowired
private AppProperties appProperties;
#Override
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub
}
#Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
ServletException {
HashSet<String> trustedIps = loadAccessIPList();
HttpServletRequest req = (HttpServletRequest) request;
Map<String, String> headerMap = new HashMap<String, String>();
Enumeration<String> headers = req.getHeaderNames();
while (headers.hasMoreElements()) {
String str = (String) headers.nextElement();
headerMap.put(str, req.getHeader(str));
}
.............
}
And I define a Configuration to include it.
#Configuration
public class CustomWebSecurityConfigurerAdapter {
#Bean
public FilterRegistrationBean filterRegistrationBean() {
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
ClientIpFilter securityFilter = new ClientIpFilter();
registrationBean.setFilter(securityFilter);
registrationBean.setOrder(1);
return registrationBean;
}
}
But the Filter cannot autowired AppProperties which includes configuration from my application.preperties.

Answer 1

Your AppProperties file should be like below with annotations and appropriate prefix as mentioned in application.properties file
#Configuration
#ConfigurationProperties(prefix = "com.test")
public class AppProperties {
private String name;
private String age;
}
The #EnableConfigurationProperties should not be required in ClientFilter class. Just autowiring the Properties file should be ok ..

Answer 2

I find the root reason. I need to let the ClientIpFilter to be a component so that it can be autowired, then spring can register other property.
#Component
#EnableConfigurationProperties(AppProperties.class)
public class ClientIpFilter implements Filter {
#Autowired
private AppProperties appProperties;
#Override
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub
}
#Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
ServletException {
HashSet<String> trustedIps = loadAccessIPList();
HttpServletRequest req = (HttpServletRequest) request;
Map<String, String> headerMap = new HashMap<String, String>();
.............
}