post请求application/x-www-form-urlencoded

import org.springframework.http.HttpHeaders;

import org.springframework.http.MediaType;
import org.springframework.web.client.RestTemplate
import org.springframework.util.MultiValueMap;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.http.HttpEntity

public static String postWithParamsForString(String url, String authorization , String grant_type, String scope) {

        HttpHeaders headers = new HttpHeaders();
        org.springframework.http.MediaType mediaType = org.springframework.http.MediaType.APPLICATION_FORM_URLENCODED;
        headers.setContentType(mediaType);
        headers.add("Authorization", authorization);
        RestTemplate restTemplate=new RestTemplate();
        MultiValueMap<String, String> forms= new LinkedMultiValueMap<String, String>();
        forms.put("grant_type", Collections.singletonList(grant_type));
        forms.put("scope", Collections.singletonList(scope));
        HttpEntity<MultiValueMap<String, String>> httpEntity = new HttpEntity<MultiValueMap<String, String>>(forms, headers);
        String body = restTemplate.postForObject(url, httpEntity, String.class);
        return body;
    }