ApplicationContextFacade.java 文件源码

@Override
public FilterRegistration.Dynamic addFilter(String filterName,
        Class<? extends Filter> filterClass) {
    if (SecurityUtil.isPackageProtectionEnabled()) {
        return (FilterRegistration.Dynamic) doPrivileged("addFilter",
                new Class[]{String.class, Class.class},
                new Object[]{filterName, filterClass});
    } else {
        return context.addFilter(filterName, filterClass);
    }
}