如何在RestTemplate中将主体作为Json发送以从API获取数据

问题描述

我正在尝试从Rest调用者获取数据以从API获取数据，当我使用curl时，我的api端点支持带有json主体的get方法作为请求，它正在起作用，我的curl命令是:

Hi I am trying to get data from the Rest caller to get data from the API my api end point support the get method with the json body as a request when I use curl it is working my curl command is :

curl -X GET http://ec2-URL.com:5000/TL/data  -H 'Content-Type: application/json'  -d '{ "meta": "NJ", "name": "US"}'

我的Spring代码是这样的:

And My Spring code is this:

public String getData() {
        RestTemplate restTemplate = new RestTemplate();
        try {

            String requestJson = "{ \"meta\": \"NJ\", \"name\": \"US\" }";
            HttpHeaders headers = new HttpHeaders();
            headers.set("Content-Type", "application/json");
            HttpEntity<String> entity = new HttpEntity<>(requestJson, headers);
            ResponseEntity<?> lado = restTemplate.exchange("http://ec2-URL.com:5000/TL/data", HttpMethod.GET, entity, Object.class);
        } catch (Exception exc) {
            logger.error("[WebServiceCallerUtil] Exception while calling . {} ", exc.getMessage());
        }
        return " ";
    }

每次遇到错误时，我都会提出错误的要求.我知道这很容易，但是..我也尝试像这样使用Map:

I am getting bad request everytime am I dong any wrong.. I know its very easy but..I tried to use Map also like this :

MultiValueMap<String, String> map = new LinkedMultiValueMap<>();
            map.add("meta", "NJ");
            map.add("name", US);
HttpEntity<?> entity = new HttpEntity<>(map, httpHeaders);

我的错误是什么?如何在get方法中发送json正文?

推荐答案

尝试一下，

private static HttpEntity<?> getHeaders(){
    HttpHeaders headers = new HttpHeaders();
    headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);
    return new HttpEntity<>(headers);
}

public String getData() {
    RestTemplate restTemplate = new RestTemplate();
    try {

        String requestJson = "{ \"meta\": \"NJ\", \"name\": \"US\" }";
        Object lado = restTemplate.getForObject("http://ec2-URL.com:5000/TL/data?requestJson= {requestJson}", Object.class,requestJson, getHeaders());

    } catch (Exception exc) {
        logger.error("[WebServiceCallerUtil] Exception while calling . {} ", exc.getMessage());
    }
    return " ";
}

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