Java proxy access http

Configure proxy to access http in RestTemplate

import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpHost;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.ssl.SSLContextBuilder;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

import javax.net.ssl.SSLContext;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;

@Slf4j
public class RestTemplateUtil {

    public static RestTemplate getRestTemplate(int timeOut){
        ClientHttpRequestFactory requestFactory = null;
        try {
            requestFactory = new HttpComponentsClientHttpRequestFactory(httpClient(timeOut));
        } catch (Exception e) {