springboot学习之如何调用RESTful Web服务

2023-04-12

springboot学习之如何调用RESTful Web服务

新建工程gs-consuming-rest

新建entity
完善Application

模拟远程服务
运行gs-consuming-rest工程
学习总结

此文意在学习创建一个工程并调用一个远程服务。

新建工程gs-consuming-rest

新建工程步骤参考：《springboot学习之构建 RESTful Web服务》新建web 工程。

新建entity

public class Greeting {

    private long id;
    private String content;

    public Greeting(long id, String content) {
        this.id = id;
        this.content = content;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    @Override
    public String toString() {
        return "Greeting{" +
                "id=" + id +
                ", content='" + content + '\'' +
                '}';
    }
}

完善Application

@SpringBootApplication
public class ConsumingRestApplication {

    private static final Logger log = LoggerFactory.getLogger(ConsumingRestApplication.class);

    public static void main(String[] args) {
        SpringApplication.run(ConsumingRestApplication.class, args);
    }

    @Bean
    public RestTemplate restTemplate(RestTemplateBuilder builder) {
        return builder.build();
    }

    @Bean
    public CommandLineRunner run(RestTemplate restTemplate) throws Exception {
        return args -> {
            Greeting greeting = restTemplate.getForObject(
                    "http://127.0.0.1:8080/gs-rest-service/greeting", Greeting.class);
            log.info(greeting.toString());
        };
    }

}

CommandLineRunner表示在启动时执行RestTemplate