举例：
ResponseEntity<Book> responseEntity = restTemplate.getForEntity("http://127.0.0.1:8080/getbook?bookname={1}", Book.class, "java"); Book book = responseEntity.getBody(); //响应体转换为Book类型 int statusCodeValue = responseEntity.getStatusCodeValue(); //响应状态码 HttpHeaders headers = responseEntity.getHeaders(); //响应头信息 getForObject()发送GET请求，返回指定的Object类型
/** * 参数1： String类型 或 URI类型的请求地址 * 参数2： 指定返回的实体类型，class对象 * 参数3： uri参数，可以是变长数组或map * 返回值：responseType指定的Object类型 */ @Override public <T> T getForObject(String url, Class<T> responseType, Object... uriVariables) throws RestClientException { RequestCallback requestCallback = acceptHeaderRequestCallback(responseType); HttpMessageConverterExtractor<T> responseExtractor = new HttpMessageConverterExtractor<T>(responseType, getMessageConverters(), logger); return execute(url, HttpMethod.GET, requestCallback, responseExtractor, uriVariables); } @Override public <T> T getForObject(String url, Class<T> responseType, Map<String, ?> uriVariables) throws RestClientException { RequestCallback requestCallback = acceptHeaderRequestCallback(responseType); HttpMessageConverterExtractor<T> responseExtractor = new HttpMessageConverterExtractor<T>(responseType, getMessageConverters(), logger); return execute(url, HttpMethod.GET, requestCallback, responseExtractor, uriVariables); } @Override public <T> T getForObject(URI url, Class<T> responseType) throws RestClientException { RequestCallback requestCallback = acceptHeaderRequestCallback(responseType); HttpMessageConverterExtractor<T> responseExtractor = new HttpMessageConverterExtractor<T>(responseType, getMessageConverters(), logger); return execute(url, HttpMethod.GET, requestCallback, responseExtractor); }举例：
Book book = restTemplate.getForObject("http://127.0.0.1:8080/getbook?bookname={1}", Book.class, "java"); POST方法 postForEntity()发送POST请求，返回ResponseEntity
/** * 参数1： String类型 或 URI类型的请求地址 * 参数2： 请求body，可以是HttpEntity类型（可设置request header），或其它Object类型 * 参数3： 指定返回的实体类型，class对象 * 参数4： uri参数，可以是变长数组或map * 返回值：ResponseEntity<T>是Spring对HTTP响应的封装，包括了几个重要的元素，如响应码、contentType、contentLength、response header信息，response body信息等 */ @Override public <T> ResponseEntity<T> postForEntity(String url, Object request, Class<T> responseType, Object... uriVariables) throws RestClientException { RequestCallback requestCallback = httpEntityCallback(request, responseType); ResponseExtractor<ResponseEntity<T>> responseExtractor = responseEntityExtractor(responseType); return execute(url, HttpMethod.POST, requestCallback, responseExtractor, uriVariables); } @Override public <T> ResponseEntity<T> postForEntity(String url, Object request, Class<T> responseType, Map<String, ?> uriVariables) throws RestClientException { RequestCallback requestCallback = httpEntityCallback(request, responseType); ResponseExtractor<ResponseEntity<T>> responseExtractor = responseEntityExtractor(responseType); return execute(url, HttpMethod.POST, requestCallback, responseExtractor, uriVariables); } @Override public <T> ResponseEntity<T> postForEntity(URI url, Object request, Class<T> responseType) throws RestClientException { RequestCallback requestCallback = httpEntityCallback(request, responseType); ResponseExtractor<ResponseEntity<T>> responseExtractor = responseEntityExtractor(responseType); return execute(url, HttpMethod.POST, requestCallback, responseExtractor); }