使用RestTemplate做这件事非常简单

package hello;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.boot.CommandLineRunner;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.web.client.RestTemplate;@SpringBootApplicationpublic class Application implements CommandLineRunner {    private static final Logger log = LoggerFactory.getLogger(Application.class);    public static void main(String args[]) {        SpringApplication.run(Application.class);    }    @Override    public void run(String... args) throws Exception {        RestTemplate restTemplate = new RestTemplate();        Quote quote = restTemplate.getForObject("http://gturnquist-quoters.cfapps.io/api/random", Quote.class);        log.info(quote.toString());    }}

在日常的工作中我们返回的结果通常是一个Wrapper，含有一个泛型属性来表示真正的业务对象。这就要用到ParameterizedTypeReference

 

代码就成了这样了

 

@Override    public void run(String... args) throws Exception {        RestTemplate restTemplate = new RestTemplate();        ResponseWrapper
     
       quote = restTemplate.exchange("http://gturnquist-quoters.cfapps.io/api/random", HttpMethod.GET, null, new ParameterizedTypeReference
      
       
        >() {});         log.info(quote.toString());     }