{  "Author": "tomcat and jerry",  "url":"http://www.cnblogs.com/tomcatandjerry/p/5899722.html"    }

String url = "http://localhost:8080/json";JSONObject json = restTemplate.getForEntity(url, JSONObject.class).getBody();

RestTemplateConfig.java@Configurationpublic 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);    }    }

@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";    }