Spring Android：使用带有 https 和 cookie 的 RestTemplate

使用Spring Android的RestTemplate可以轻松地与远程服务器进行通信，并且支持https和cookie的使用。本文将介绍如何在Android应用中使用RestTemplate，并提供一个示例代码。

groovy
implementation 'org.springframework.android:spring-android-rest-template:2.0.0.M3'

java
import org.apache.http.client.HttpClient;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.impl.client.DefaultHttpClient;
public class CustomHttpClient extends DefaultHttpClient {
    private static final int HTTPS_PORT = 443;
    public CustomHttpClient() {
        super();
        SSLContext sslContext = SSLContext.getInstance("TLS");
        sslContext.init(null, null, null);
        SSLSocketFactory socketFactory = new SSLSocketFactory(sslContext, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        Scheme scheme = new Scheme("https", socketFactory, HTTPS_PORT);
        getConnectionManager().getSchemeRegistry().register(scheme);
    }
}

java
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;
public class MyRestTemplate {
    private static final int TIMEOUT = 5000;
    public static RestTemplate createRestTemplate() {
        ClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(new CustomHttpClient());
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.getInterceptors().add(new MyCookieInterceptor());
        restTemplate.setRequestFactory(requestFactory);
        return restTemplate;
    }
}

java
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
public class MyActivity extends Activity {
    private static final String URL = "https://example.com/api";
    private RestTemplate restTemplate;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        restTemplate = MyRestTemplate.createRestTemplate();
        new AsyncTask>() {
            @Override
            protected void onPreExecute() {
                // 显示进度条等操作
            }
            @Override
            protected ResponseEntity doInBackground(Void... params) {
                return restTemplate.exchange(URL, HttpMethod.GET, null, String.class);
            }
            @Override
            protected void onPostExecute(ResponseEntity responseEntity) {
                // 处理响应数据
            }
        }.execute();
    }
}