不使用LinkedMultiValueMap将请求正文传递给Spring Rest模板

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>5.3.10</version>
</dependency>

LinkedMultiValueMap<String, String> requestBody = new LinkedMultiValueMap<>();
requestBody.add("key1", "value1");
requestBody.add("key2", "value2");

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);

HttpEntity<LinkedMultiValueMap<String, String>> requestEntity = new HttpEntity<>(requestBody, headers);

RestTemplate restTemplate = new RestTemplate();
ResponseEntity<String> responseEntity = restTemplate.postForEntity(url, requestEntity, String.class);