SpringBoot 3.1 新版HTTP调用

news2025/1/12 0:45:48

在SpringBoot3版本发布后官方便声明了推荐使用了内置声明式的HTTP客户端。

一、声明式HTTP客户端使用(依赖引入)

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>

二、被调用方编写(粗略代码逻辑)

@RestController
public class UserController {

    @GetMapping("/users")
    public List<User> list() {
        //返回十条数据 从1开始到10 输出示例:1:User1 --- 10:User10
        return IntStream.rangeClosed(1, 10)
                .mapToObj(i -> new User(i, "User" + i))
                .collect(Collectors.toList());
    }
}

三、调用方 HTTP端点编写

//标记为http interface端点
@HttpExchange
public interface UserApiService {
    //被调用方的接口路径
    @GetExchange("/users")
    List<User> getUsers();
}

四、工具类封装

public class RemoteUtil {

    /**
     * 远程调用方法 模板代码
     * @param url 调用的地址
     * @param serviceType 返回的类型
     */
    public static <S> S Remoting(String url, Class<S> serviceType){
        WebClient client = WebClient.builder().baseUrl(url).build();
        HttpServiceProxyFactory factory = HttpServiceProxyFactory.builder(WebClientAdapter.forClient(client)).build();
        return factory.createClient(serviceType);
    }
}

五、调用地址定义常量

public class UserConstant {

    public static final String USER_SERVICE_ADDRESS = "http://localhost:8080";
}

六、业务调用代码编写

@Service
public class UserServiceImpl implements UserService{


    @Override
    public List<User> getUsers() {
        UserApiService userApiService = RemoteUtil.Remoting(UserConstant.USER_SERVICE_ADDRESS, UserApiService.class);
        return userApiService.getUsers();
    }
}

七、调用接口

@RestController
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/getUsers")
    public List<User> getUsers(){
        return userService.getUsers();
    }
}