您可以动态注册Tomcat的远程地址过滤器。

http://tomcat.apache.org/tomcat-7.0-doc/config/filter.html#Remote_Address_Filter

看起来像这样：

@WebListener
public class MyServletContextListener implements ServletContextListener {
  @Override
  public void contextInitialized(ServletContextEvent sce) {
    // Get IP addresses from the DB or text file.
    ...

    ServletContext sc = sce.getServletContext();
    FilterRegistration fr;
    fr = sc.addFilter("RemoteAddrFilter", "org.apache.catalina.filters.RemoteAddrFilter");
    fr.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST), true, "/*");
    fr.setInitParameter("allow", "127\\.0\\.0\\.1");
    fr.setInitParameter("denyStatus", "403");
  }
}