java 调用接口restTemplate

今天用restTemplate调用别人的接口，传递参数时，调用了下面的方法。

private <T> HttpEntity<?> getEntity(T... entity) {
    HttpHeaders requestHeaders = new HttpHeaders();
    List<MediaType> mediaTypes = new ArrayList<MediaType>();
    mediaTypes.add(MediaType.APPLICATION_JSON);
    requestHeaders.setAccept(mediaTypes);
    requestHeaders.set("Content-Type", "application/json");
    requestHeaders.set("token", token);
    HttpEntity<?> requestEntity = new HttpEntity<>(entity, requestHeaders);
    return requestEntity;
}
当我传递一个实体到这个方法的时候总是返回说有未填写的必填项。用了抓包工具，发现传递的实体参数变成了数组。后来改成了下面的

private <T> HttpEntity<?> getEntity(T entity) {
    HttpHeaders requestHeaders = new HttpHeaders();
    List<MediaType> mediaTypes = new ArrayList<MediaType>();
    mediaTypes.add(MediaType.APPLICATION_JSON);
    requestHeaders.setAccept(mediaTypes);
    requestHeaders.set("Content-Type", "application/json");
    requestHeaders.set("token", token);
    HttpEntity<?> requestEntity = new HttpEntity<>(entity, requestHeaders);
    return requestEntity;
}