说明：
1）url: 请求地址；
2）method: 请求类型(如：POST,PUT,DELETE,GET)；
3）requestEntity: 请求实体，封装请求头，请求内容
4）responseType: 响应类型，根据服务接口的返回类型决定
5）uriVariables: url中参数变量值

1 String reqJsOnStr= "{"code":"testCode", "group":"testGroup","content":"testContent", "order":1}";
2 HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_JSON);
3 HttpEntity entity = new HttpEntity(reqJsonStr,headers);
4 ResponseEntity

String reqJsOnStr= "{"id":227,"code":"updateCC", "group":"UPDATE","content":"updateCT", "order":9}";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity entity = new HttpEntity(reqJsonStr,headers);
ResponseEntity

返回数据对象Object，例如：
DicData data = new DicData();
data.setCode("cd123"); data.setGroup("TEST"); data.setContent("测试数据"); data.setOrder(5);
DicData obj = restTemplate.postForObject(DIC_DATA_URL, data, DicData.class);
> 或者
postForEntity:(String url, Object request, Class responseType, Object uriVariables[])

例如：
DicData data = new DicData();
data.setId(226L); data.setCode("updateCode"); data.setGroup("UPDATE");
data.setContent("测试数据"); data.setOrder(9);
restTemplate.put(DIC_DATA_URL, data);

例如：
restTemplate.delete(DIC_DATA_URL + "?id={id}", 222);

返回请求的结果对象，例如
Order o = restTemplate.getForObject(Constants.SERVER_URL+"/order?orderCode={orderCode}",
Order.class,order.getOrderCode());
getForEntity(String url, Class responseType, Object urlVariables[])：
返回封装了数据对象的ResponseEntity对象，例如：
ResponseEntity ebtuserRespOnse= restTemplate.getForEntity(url,EBTUser.class);
EBTUser user = ebtuserResponse.getBody();

(1)返回List类型数据
DicData[] dicResult = restTemplate.getForObject( Constants.SERVER_URL + "/dicDatas/dicData?"
+ "group={group}", DicData[].class, group);
List list = Arrays.asList(dicResult);

// pass generic information to resttemplate; ParameterizedTypeReference为spring3.2版本后引进的类
ParameterizedTypeReference> respOnseType= new ParameterizedTypeReference>();
ResponseEntity> resp = restTemplate.exchange(Constants.SERVER_URL + "/dicDatas/dicData?group={group}",
HttpMethod.GET, null, responseType);
List list = resp.getBody();

> (2)返回属性中有范型数据的复合对象
比如，分页对象
ResponseEntity results = restTemplate.exchange(url,HttpMethod.GET, null, String.class, params);
// 借助com.fasterxml.jackson.databind.ObjectMapper 对象来解析嵌套的json字符串
ObjectMapper mapper = new ObjectMapper(); mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
PageInfo

page = mapper.readValue(results.getBody(), new TypeReference

>() { });