用于Http出站网关的RestTemplate正在设置自己的标头值，而不是提供的标头值

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

public class Example {
    public static void main(String[] args) {
        RestTemplate restTemplate = new RestTemplate();

        // 创建请求头对象
        HttpHeaders headers = new HttpHeaders();
        headers.add("Custom-Header", "Custom Value");

        // 创建HttpEntity对象，设置请求头
        HttpEntity<String> requestEntity = new HttpEntity<>(headers);

        // 发送HTTP请求并获取响应
        ResponseEntity<String> response = restTemplate.exchange("http://example.com/api", HttpMethod.GET, requestEntity, String.class);

        // 处理响应
        String responseBody = response.getBody();
        System.out.println(responseBody);
    }
}