使用RestTemplate提交表單數據

用exchange方法提交

exchange既能夠執行POST方法，還能夠執行GET，因此應用最爲普遍

String url = "http://localhost/";
RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
//請勿輕易改變此提交方式，大部分的狀況下，提交方式都是表單提交
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
//封裝參數，千萬不要替換爲Map與HashMap，不然參數沒法傳遞
MultiValueMap<String, String> params= new LinkedMultiValueMap<String, String>();
params.add("username", "用戶名");//支持中文
params.add("password", "123456");
HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(params, headers);
//執行HTTP請求
ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class);
//輸出結果
System.out.println(response.getBody());

用postForEntity進行提交

postForEntity是對exchange的簡化，僅僅只須要減小HttpMethod.POST參數

String url = "http://localhost/";
RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
//請勿輕易改變此提交方式，大部分的狀況下，提交方式都是表單提交
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
//封裝參數，千萬不要替換爲Map與HashMap，不然參數沒法傳遞
MultiValueMap<String, String> params= new LinkedMultiValueMap<String, String>();
params.add("username", "用戶名");//支持中文
params.add("password", "123456");
HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(params, headers);
//僅需替換exchange方法
ResponseEntity<String> response = client.postForEntity(url, requestEntity , String.class);
//輸出結果
System.out.println(response.getBody());