[ Java 常見問題 ] HttpComponent - How to find mimetype of response

Source From Here 
Question 
I am working with a GET request made using Apache HttpComponents (v4- the latest version; not the older v3)... How do I obtain the mimetype of the response? 

How-To 
A fully sample code as below: 

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1. package demo;  
2.   
3. import java.io.BufferedReader;  
4. import java.io.InputStreamReader;  
5. import java.net.URI;  
6. import java.util.List;  
7.   
8. import org.apache.http.client.config.RequestConfig;  
9. import org.apache.http.client.methods.CloseableHttpResponse;  
10. import org.apache.http.client.methods.HttpGet;  
11. import org.apache.http.client.protocol.HttpClientContext;  
12. import org.apache.http.impl.client.CloseableHttpClient;  
13. import org.apache.http.impl.client.HttpClients;  
14.   
15. public class GetDemo {  
16.   
17.     public static void main(String[] args) throws Exception {  
18.         CloseableHttpClient httpclient = HttpClients.createDefault();  
19.         try {  
20.             HttpClientContext context = HttpClientContext.create();  
21.             RequestConfig requestConfig = RequestConfig.custom()  
22.                     .setSocketTimeout(10000)  
23.                     .setConnectTimeout(10000)  
24.                     .build();  
25.             HttpGet httpget1 = new HttpGet(args[0]);  
26.             URI finalUrl = null;  
27.             httpget1.setConfig(requestConfig);  
28.             CloseableHttpResponse resp = httpclient.execute(httpget1, context);  
29.             List locations = context.getRedirectLocations();  
30.             if (locations != null) {  
31.                 finalUrl = locations.get(locations.size() - 1);  
32.             }             
33.             int code = resp.getStatusLine().getStatusCode();  
34.             String ct = resp.getEntity().getContentType().getValue();  // <--- get="" here="" mime="" span="" type="">  
35.             System.out.printf("Status code=%d (Content-type=%s)\n", code, ct);  
36.             if(finalUrl!=null)  
37.             {  
38.                 System.out.printf("%s\n", finalUrl);  
39.             }  
40.             else  
41.             {  
42.                 System.out.printf("%s\n", args[0]);  
43.             }  
44.             BufferedReader br = new BufferedReader(new InputStreamReader((resp.getEntity().getContent())));  
45.             if(ct.trim().contains("text/html"))  
46.             {  
47.                 String line = null;  
48.                 while((line=br.readLine())!=null)  
49.                 {  
50.                     System.out.printf("%s\n", line);                  
51.                 }  
52.             }  
53.             System.out.printf("===== DONE =====\n");  
54.             resp.close();  
55.         } catch (Exception e) {  
56.             e.printStackTrace();  
57.         } finally {  
58.             httpclient.close();  
59.         }  
60.     }  
61.   
62. }