如何在Spring RestTemplate中将http标头传递给GET请求[重复]答案

【问题标题】：How to pass http headers to GET request in Spring RestTemplate [duplicate]如何在Spring RestTemplate中将http标头传递给GET请求[重复]
【发布时间】：2019-03-12 07:48:26
【问题描述】：

我正在使用 Spring RestTemplate 编写客户端 REST GET 调用。我需要将 http 标头传递给 GET 调用。

请找代码sn-p:

String url = "http://<hostname>:7001/api?id=231";
ResponseEntity<ResponseObject> getEntity = this.restTemplate.getForEntity(url, ResponseObject.class);
return getEntity .getBody();

org.springframework.http.HttpHeaders headers = new org.springframework.http.HttpHeaders();
headers.set("Accept", "application/xml");
headers.set("username", "ABC");

我需要在这个 REST get 调用中传递上面的标头，例如 Accept 和 username。需要对相同的代码进行哪些更改，以便我可以在 RestTemplate 中传递标头。

【问题讨论】：

标签： java spring rest resttemplate

【解决方案1】：

将您的代码用作：

org.springframework.http.HttpHeaders headers = new 
org.springframework.http.HttpHeaders();
headers.set("Accept", "application/xml");
headers.set("username", "ABC");

String url = "http://<hostname>:7001/api?id=231";
ResponseEntity<ResponseObject> getEntity = 
this.restTemplate.exchange(url,HttpMethod.GET,new HttpEntity<>( headers),ResponseObject.class);
return getEntity .getBody();

【讨论】：

getForEntity（字符串、httpHeaders、对象）没有变体。他们有一个通过地图。我正在尝试测试 getForEntity(String, ResponseObject.class, headers)
让我编辑解决方案，请检查。

【解决方案2】：

getForEntity 不支持设置标题。请改用exchange：

HttpHeaders headers = new HttpHeaders();
headers.set("Accept", "application/xml");
headers.set("username", "ABC");

HttpEntity entity = new HttpEntity(headers);

ResponseEntity<ResponseObject> response = restTemplate.exchange(
    url, HttpMethod.GET, entity,ResponseObject.class);

【讨论】：

这也有效。

【解决方案3】：

通用的rest模板执行器方法：

public <T, E extends TIBCOResponse> E executeRequest(HttpMethod method, 
        HttpHeaders httpHeaders, 
        String url,
        T requestBody,
        Map<String, String> paramters, 
        Class<E> clazz) {

    HttpEntity<T> entity = new HttpEntity<>(requestBody, httpHeaders);

    RestTemplate restTemplate = new RestTemplate();

    ResponseEntity<E> response = restTemplate.exchange(url, method, entity, clazz, paramters);

    return response.getBody();
}

服务方法实现：

public ResponseObject FuncCallerInsideRest(IntegrationDTO integrationDTO) {

    String OPERATION_URL = "/FindAccountInfo?accountNumber="+integrationDTO.getAccountNumber();
    Map<String, String> parameters = new HashMap<>();
    httpHeaders = new HttpHeaders();

    httpHeaders.set("RetryLimit", "2");
    httpHeaders.set("Authorization", "abcd");
    httpHeaders.set("SessionID", integrationDTO.getSessionID());

    ResponseObject ResponseObject = this.executeRequest(HttpMethod.GET, httpHeaders,
            BASE_URL.concat(PATH_URL.concat(OPERATION_URL)), null, parameters,
            ResponseObject.class);

    return ResponseObject;
}

【讨论】：