> For the complete documentation index, see [llms.txt](https://jack80342.gitbook.io/spring-boot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jack80342.gitbook.io/spring-boot/iv.-spring-boot-features/33.-calling-rest-services-with-resttemplate.md).

# 33. 使用RestTemplate调用REST服务

如果应用需要调用远程REST服务，你可以使用Spring框架的`RestTemplate`类。由于`RestTemplate`实例经常在使用前需要自定义，Spring Boot就没有提供任何自动配置的`RestTemplate` bean。不过，你可以通过自动配置的`RestTemplateBuilder`创建自己需要的`RestTemplate`实例。自动配置的`RestTemplateBuilder`会确保应用到`RestTemplate`实例的`HttpMessageConverters`是合适的。

以下是典型的示例：

```java
@Service
public class MyService {

    private final RestTemplate restTemplate;

    public MyBean(RestTemplateBuilder restTemplateBuilder) {
        this.restTemplate = restTemplateBuilder.build();
    }

    public Details someRestCall(String name) {
        return this.restTemplate.getForObject("/{name}/details", Details.class, name);
    }

}
```

**注** `RestTemplateBuilder`包含很多有用的方法，可以用于快速配置一个`RestTemplate`。例如，你可以使用`builder.basicAuthorization("user", "password").build()`添加基本的认证支持（BASIC auth）。


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