import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
@Bean
@ConditionalOnMissingBean
public RestTemplateBuilder restTemplateBuilder() {
	RestTemplateBuilder builder = new RestTemplateBuilder();
	HttpMessageConverters converters = this.messageConverters.getIfUnique();
	if (converters != null) {
		builder = builder.messageConverters(converters.getConverters());
	}
	List<RestTemplateCustomizer> customizers = this.restTemplateCustomizers
			.getIfAvailable();
	if (!CollectionUtils.isEmpty(customizers)) {
		customizers = new ArrayList<RestTemplateCustomizer>(customizers);
		AnnotationAwareOrderComparator.sort(customizers);
		builder = builder.customizers(customizers);
	}
	return builder;
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
@Test
public void restTemplateShouldApplyCustomizer() throws Exception {
	load(RestTemplateCustomizerConfig.class, RestTemplateConfig.class);
	RestTemplate restTemplate = this.context.getBean(RestTemplate.class);
	RestTemplateCustomizer customizer = this.context
			.getBean(RestTemplateCustomizer.class);
	verify(customizer).customize(restTemplate);
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
private void breakBuilderOnNextCall(RestTemplateBuilder builder) {
	builder.additionalCustomizers(new RestTemplateCustomizer() {

		@Override
		public void customize(RestTemplate restTemplate) {
			throw new IllegalStateException();
		}

	});
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
@Bean
public RestTemplateCustomizer restTemplateCustomizer() {
	return mock(RestTemplateCustomizer.class);
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
/**
 * Customize the RestTemplate to use Ribbon load balancer to resolve service endpoints
 */
@Bean
public RestTemplateCustomizer ribbonClientRestTemplateCustomizer(
        final RibbonClientHttpRequestFactory ribbonClientHttpRequestFactory) {
    return new RestTemplateCustomizer() {
        @Override
        public void customize(RestTemplate restTemplate) {
            restTemplate.setRequestFactory(ribbonClientHttpRequestFactory);
        }
    };
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
public TestRestTemplateConfig(
        final ObjectProvider<HttpMessageConverters> messageConverters,
        final ObjectProvider<List<RestTemplateCustomizer>> restTemplateCustomizers) {
    super(messageConverters, restTemplateCustomizers);
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
@Bean
@Order(2)
@ConditionalOnBean(OkHttp3ClientHttpRequestFactory.class)
public RestTemplateCustomizer okhttp3RestTemplateCustomizer(OkHttp3ClientHttpRequestFactory requestFactory) {
    return restTemplate -> restTemplate.setRequestFactory(requestFactory);
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
public RestTemplateConfiguration(
		ObjectProvider<HttpMessageConverters> messageConverters,
		ObjectProvider<List<RestTemplateCustomizer>> restTemplateCustomizers) {
	this.messageConverters = messageConverters;
	this.restTemplateCustomizers = restTemplateCustomizers;
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
@Bean
public RestTemplateCustomizer testRestTemplateCustomizer() {
	return b -> b.setErrorHandler(errorHandler);
}
 

import org.springframework.boot.web.client.RestTemplateCustomizer; //导入依赖的package包/类
@Bean
RestTemplateCustomizer mockMvcCustomizer(BeanFactory beanFactory) {
	return template -> template.setRequestFactory(
			beanFactory.getBean(MockMvcClientHttpRequestFactory.class));
}