如何模拟本地OAuth2RestTemplate restTemplate？

import org.springframework.security.oauth2.client.OAuth2RestTemplate;

public class LocalOAuth2RestTemplate extends OAuth2RestTemplate {

    public LocalOAuth2RestTemplate(OAuth2ProtectedResourceDetails resource) {
        super(resource);
    }

    @Override
    public OAuth2AccessToken getAccessToken() throws UserRedirectRequiredException {
        // 模拟获取访问令牌的逻辑
        return new DefaultOAuth2AccessToken("access_token");
    }

    @Override
    public <T> ResponseEntity<T> exchange(RequestEntity<?> requestEntity, Class<T> responseType) throws RestClientException {
        // 模拟发送HTTP请求并返回响应的逻辑
        return new ResponseEntity<>(responseType);
    }
}

OAuth2ProtectedResourceDetails resource = new AuthorizationCodeResourceDetails();
LocalOAuth2RestTemplate restTemplate = new LocalOAuth2RestTemplate(resource);

// 使用模拟的OAuth2RestTemplate发送HTTP请求
ResponseEntity<String> response = restTemplate.exchange(requestEntity, String.class);