Connect to internet : Google Custom Search in java app “not connecting” ()

问题

I am starting out on using google custom search api in java but it is just not connecting. I am receiving json data from google.(i am supposed to but it is not connecting..:()

 HttpResponse response = httpClient.execute(httpGet); 
 // exception is thrown at this point.

which is a line in my code. Code is :

public class MyGoogleSearch{
final static  String searchURL = "https://www.googleapis.com/customsearch/v1?";
// This is Important : 

final static String apiKey = "My-Key-has a '-'";
final static String customSearchEngineKey = "My-Custom-search-engine-that-has a ':' too";

public String makeSearchString(String qSearch){
    String toSearch = searchURL + "key=" + apiKey + "&cx=" + customSearchEngineKey;
    toSearch += "&q=" + qSearch + "&alt=json";
    return toSearch;
}

public static void main(String[] argv) throws IOException{
    System.setProperty("proxyHost", "my-host");
    System.setProperty("proxyPort","my-Port");

    MyGoogleSearch browser = new MyGoogleSearch();
    String toSearch = browser.makeSearchString("flower");
    System.out.println(toSearch);
    HttpClient httpClient = new DefaultHttpClient();
    HttpGet httpGet = new HttpGet(toSearch);

    HttpResponse response = httpClient.execute(httpGet);
    // exception is thrown here.
    HttpEntity entity = response.getEntity();

    if(entity != null){
        InputStream inStream = entity.getContent();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inStream));
        int length = 0;
        byte[] buffer  = new byte[2048];
        while((length = inStream.read(buffer)) != -1)
            System.out.println(buffer);
        String inputLine;
        while((inputLine = reader.readLine()) != null)
            System.out.println(inputLine);
    }
}

}

// Error is:

Exception in thread "main" org.apache.http.conn.HttpHostConnectException: Connection to https://www.googleapis.com refused at   
org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:158)

....

Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)

Is this the valid way to do ? I have not done any kind of UTF-8 encoding. Would that be a problem ?

I however put my Custom Search Engine Key at cx which should be right

I went to google api explorer https://code.google.com/apis/explorer/

I choose custom search and filled *q and cx column as i filled in my program:

and it showed results and GET https://www.googleapis.com/customsearch/v1?q=o&cx={MY-Custom-Search-Engine-No}&pp=1&key={YOUR_API_KEY}

but this time cx value had %3 at the place of ':' character.

How would i do that for all the characters in my keys and cse-no

回答1:

the problem seems to be connecting to googleapis, are you sure you're using the correct proxy? Try just connecting to google.com or any URL to test you are getting past the proxy, try it without setting the proxy as well.

来源：https://stackoverflow.com/questions/7301608/connect-to-internet-google-custom-search-in-java-app-not-connecting

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