EnvironmentEntryInitializingTreeMap.java 文件源码

@Override
public T put(String key, T value) {
    // boot 2 call this first
    Binder binder = new Binder(ConfigurationPropertySources.get(environment),new PropertySourcesPlaceholdersResolver(environment),this.conversionService);
    binder.bind(defaultsPrefix, Bindable.ofInstance(value));
    return this.delegate.put(key, value);
}