{ "Author": "tomcat and jerry", "url":"http://www.cnblogs.com/tomcatandjerry/p/5899722.html" }
Spring RestTemplate, 使用java访问URL更加优雅,更加方便。
核心代码:
String url = "http://localhost:8080/json"; JSONObject json = restTemplate.getForEntity(url, JSONObject.class).getBody();
就这么简单,API访问完成了!
附上SpringBoot相关的完整代码:
RestTemplateConfig.java @Configuration public class RestTemplateConfig{ @Bean public RestTemplate restTemplate(ClientHttpRequestFactory factory){ return new RestTemplate(factory); } @Bean public ClientHttpRequestFactory simpleClientHttpRequestFactory(){ SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory(); factory.setReadTimeout(5000);//ms factory.setConnectTimeout(15000);//ms return factory; } }
SpringRestTemplateApp.java @RestController @EnableAutoConfiguration @Import(value = {Conf.class}) public class SpringRestTemplateApp { @Autowired RestTemplate restTemplate; /***********HTTP GET method*************/ @RequestMapping("") public String hello(){ String url = "http://localhost:8080/json"; JSONObject json = restTemplate.getForEntity(url, JSONObject.class).getBody(); return json.toJSONString(); } @RequestMapping("/json") public Object genJson(){ JSONObject json = new JSONObject(); json.put("descp", "this is spring rest template sample"); return json; } /**********HTTP POST method**************/ @RequestMapping("/postApi") public Object iAmPostApi(@RequestBody JSONObject parm){ System.out.println(parm.toJSONString()); parm.put("result", "hello post"); return parm; } @RequestMapping("/post") public Object testPost(){ String url = "http://localhost:8080/postApi"; JSONObject postData = new JSONObject(); postData.put("descp", "request for post"); JSONObject json = restTemplate.postForEntity(url, postData, JSONObject.class).getBody(); return json.toJSONString(); } public static void main(String[] args) throws Exception { SpringApplication.run(SpringRestTemplateApp.class, args); } }
===============================
另外还支持异步调用AsyncRestTemplate
@RequestMapping("/async") public String asyncReq(){ String url = "http://localhost:8080/jsonAsync"; ListenableFuture<ResponseEntity<JSONObject>> future = asyncRestTemplate.getForEntity(url, JSONObject.class); future.addCallback(new SuccessCallback<ResponseEntity<JSONObject>>() { public void onSuccess(ResponseEntity<JSONObject> result) { System.out.println(result.getBody().toJSONString()); } }, new FailureCallback() { public void onFailure(Throwable ex) { System.out.println("onFailure:"+ex); } }); return "this is async sample"; }
时间: 2024-11-09 00:32:14