带大括号的 RestTemplate 请求(“{"、“}") [英] RestTemplate request with braces ("{", "}")

问题描述

我想通过 RestTemplate 发送请求.但是我的网址有大括号('{'，'}')，因此我有例外:没有足够的变量值可用于扩展......".

I want to send request through RestTemplate. But my url has braces ('{', '}'), and therefore I have exception: "Not enough variable values available to expand ...".

我尝试通过uri来做

UriComponentsBuilder builder = UriComponentsBuilder.fromPath(url);
UriComponents uriComponents = builder.build();
URI uri = uriComponents.toUri();

但是我得到了新的异常:protocol = https host = null".

But I got new exception:"protocol = https host = null".

如何使用我的 URL 发送请求?在 URL 中必须是大括号.

How I can send request with my URL? In URL must be braces.

我的代码:

String url = "https://api.vk.com/method/execute?code=return[API.users.search({"count":1})];&access_token...
String result = restTemplate.getForObject(url, String.class);

推荐答案

下面的代码使用 UriComponentsBuilder 加密 uri，使用 RestTemplate 添加查询参数并设置 HttpHeaders 如果有的话.

Below code encrypts the uri using UriComponentsBuilder, adds query params using RestTemplate and also sets HttpHeaders if any.

public HttpEntity<String> getEntityByUri() {
        String req = "https://api.vk.com/method/execute";

        UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(req)
                .queryParam("code",
                        "return[API.users.search({"count":1})]");
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Arrays.asList(MediaType.ALL));
        HttpEntity<String> httpEntity = new HttpEntity<String>(headers);
        return new RestTemplate().exchange(builder.build().encode().toUri(), HttpMethod.GET, httpEntity, String.class);
    }

希望这会有所帮助并祝您好运！

Hope this helps and good luck!

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