import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
@Test
public void testCanUseClientCredentials() {
	this.context = new AnnotationConfigServletWebServerApplicationContext();
	this.context.register(TestSecurityConfiguration.class,
			MinimalSecureWebApplication.class);
	TestPropertyValues
			.of("security.oauth2.client.clientId=client",
					"security.oauth2.client.grantType=client_credentials")
			.applyTo(this.context);
	ConfigurationPropertySources.attach(this.context.getEnvironment());
	this.context.refresh();
	OAuth2ClientContext bean = this.context.getBean(OAuth2ClientContext.class);
	assertThat(bean.getAccessTokenRequest()).isNotNull();
	assertThat(countBeans(ClientCredentialsResourceDetails.class)).isEqualTo(1);
	assertThat(countBeans(OAuth2ClientContext.class)).isEqualTo(1);
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
@Test
public void testCanUseClientCredentialsWithEnableOAuth2Client() {
	this.context = new AnnotationConfigServletWebServerApplicationContext();
	this.context.register(ClientConfiguration.class,
			MinimalSecureWebApplication.class);
	TestPropertyValues
			.of("security.oauth2.client.clientId=client",
					"security.oauth2.client.grantType=client_credentials")
			.applyTo(this.context);
	ConfigurationPropertySources.attach(this.context.getEnvironment());
	this.context.refresh();
	// The primary context is fine (not session scoped):
	OAuth2ClientContext bean = this.context.getBean(OAuth2ClientContext.class);
	assertThat(bean.getAccessTokenRequest()).isNotNull();
	assertThat(countBeans(ClientCredentialsResourceDetails.class)).isEqualTo(1);
	// Kind of a bug (should ideally be 1), but the cause is in Spring OAuth2 (there
	// is no need for the extra session-scoped bean). What this test proves is that
	// even if the user screws up and does @EnableOAuth2Client for client credentials,
	// it will still just about work (because of the @Primary annotation on the
	// Boot-created instance of OAuth2ClientContext).
	assertThat(countBeans(OAuth2ClientContext.class)).isEqualTo(2);
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
@Override
public ConditionOutcome getMatchOutcome(ConditionContext context,
    AnnotatedTypeMetadata metadata) {
  String prefix = (String) attribute(metadata, "prefix");
  Class<?> value = (Class<?>) attribute(metadata, "value");
  ConfigurableEnvironment environment = (ConfigurableEnvironment) context.getEnvironment();
  try {
    new Binder(ConfigurationPropertySources.from(environment.getPropertySources()))
        .bind(prefix, Bindable.of(value))
        .orElseThrow(
            () -> new FatalBeanException("Could not bind DataSourceSettings properties"));
    return new ConditionOutcome(true, String.format("Map property [%s] is not empty", prefix));
  } catch (Exception e) {
    //ignore
  }
  return new ConditionOutcome(false, String.format("Map property [%s] is empty", prefix));
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
@Test
public void testDisablingAuthorizationServer() {
	this.context = new AnnotationConfigServletWebServerApplicationContext();
	this.context.register(ResourceServerConfiguration.class,
			MinimalSecureWebApplication.class);
	TestPropertyValues.of("security.oauth2.resource.jwt.keyValue:DEADBEEF")
			.applyTo(this.context);
	ConfigurationPropertySources.attach(this.context.getEnvironment());
	this.context.refresh();
	assertThat(countBeans(RESOURCE_SERVER_CONFIG)).isEqualTo(1);
	assertThat(countBeans(AUTHORIZATION_SERVER_CONFIG)).isEqualTo(0);
	assertThat(countBeans(UserApprovalHandler.class)).isEqualTo(0);
	assertThat(countBeans(DefaultTokenServices.class)).isEqualTo(1);
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
@Override
public T get(Object key) {
	if (!this.delegate.containsKey(key) && key instanceof String) {
		T entry = BeanUtils.instantiateClass(entryClass);
		Binder binder = new Binder(ConfigurationPropertySources.get(environment),new PropertySourcesPlaceholdersResolver(environment),this.conversionService);
		binder.bind(defaultsPrefix, Bindable.ofInstance(entry));
		this.delegate.put((String) key, entry);
	}
	return this.delegate.get(key);
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
@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);
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
private HostInfo getFirstNonLoopbackHostInfo(ConfigurableEnvironment environment) {
	InetUtilsProperties target = new InetUtilsProperties();
	ConfigurationPropertySources.attach(environment);
	Binder.get(environment).bind(InetUtilsProperties.PREFIX,
			Bindable.ofInstance(target));
	try (InetUtils utils = new InetUtils(target)) {
		return utils.findFirstNonLoopbackHostInfo();
	}
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
private void setupContext(Class<?>... config) {
	ConfigurationPropertySources.attach(this.context.getEnvironment());
	this.context.register(PropertyPlaceholderAutoConfiguration.class, EurekaDiscoveryClientConfiguration.class);
	for (Class<?> value : config) {
		this.context.register(value);
	}
	this.context.register(TestConfiguration.class);
	this.context.refresh();
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
protected <T> T resolverSetting(Class<T> clazz, MutablePropertySources propertySources) {
  return new Binder(ConfigurationPropertySources.from(propertySources))
      .bind("loc", Bindable.of(clazz))
      .orElseThrow(() -> new FatalBeanException("Could not bind DataSourceSettings properties"));
}
 

import org.springframework.boot.context.properties.source.ConfigurationPropertySources; //导入依赖的package包/类
private ClientProperties getClientProperties(ConditionContext context) {
    Iterable<ConfigurationPropertySource> sources = ConfigurationPropertySources.get(context.getEnvironment());
    ClientProperties clientProperties = new ClientProperties();
    new Binder(sources).bind("spring.boot.admin.client", Bindable.ofInstance(clientProperties));
    return clientProperties;
}