通过springboot使用resttenple 调用第三方接口事例

好的，下面是一个使用 Spring Boot 和 RestTemplate 调用第三方接口的示例：

1. 首先在 pom.xml 文件中添加以下依赖：

<dependencies>
    <!-- Spring Boot Web Starter -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- Spring Boot Test Starter -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <!-- Spring Boot RestTemplate Starter -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web-services</artifactId>
    </dependency>
</dependencies>

2. 编写一个 RestTemplate 配置类：

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }

}

3. 编写一个使用 RestTemplate 调用第三方接口的服务类：

@Service
public class ThirdPartyService {

    private final RestTemplate restTemplate;

    @Autowired
    public ThirdPartyService(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    public String getDataFromThirdPartyApi() {
        String apiUrl = "http://example.com/api/data";
        ResponseEntity<String> responseEntity = restTemplate.getForEntity(apiUrl, String.class);
        if (responseEntity.getStatusCode() == HttpStatus.OK) {
            return responseEntity.getBody();
        } else {
            throw new RuntimeException("Something went wrong while calling third party API");
        }
    }

}

4. 最后，在 Controller 中注入 ThirdPartyService 并调用相关方法：

@RestController
public class MyController {

    private final ThirdPartyService thirdPartyService;

    @Autowired
    public MyController(ThirdPartyService thirdPartyService) {
        this.thirdPartyService = thirdPartyService;
    }

    @GetMapping("/data")
    public String getData() {
        return thirdPartyService.getDataFromThirdPartyApi();
    }

}

这样，在浏览器中访问 http://localhost:8080/data 就会调用第三方接口并返回数据了。