Google +1 API pluses count is available through the following endpoint:


<pre class="brush: java">
https://clients6.google.com/rpc?
	key=AIzaSyCKSbrvQasunBoV16zDH9R33D88CeLr9gQ
</pre>


The service is a JSON RPC setup which requires a POST request using JSON data with the following format. Just supply the URL of the target page replacing the PAGE_URL in the sample below.


<pre class="brush: bash">
[
{"method":
 "pos.plusones.get",
	"id":"p",
	"params":{"nolog":true,"id":"PAGE_URL",
 "source":"widget",
 "userId":"@viewer",
 "groupId":"@self"},
	"jsonrpc":"2.0","key":"p","apiVersion":"v1"
}
]
</pre>


The response should look like the following:


<pre class="brush: bash">
[
{"result": 
 { "kind": "pos#plusones", 
 "id": "PAGE_URL", 
 "isSetByViewer": false, 
 "metadata": 
 {"type": "URL", 
		"globalCounts": {"count": 51.0} 
 } 
 } "id": "p"
}
]
</pre>


<h3>
The Java Code
</h3>

Below is how we implemented the request and extract the count from JSON data in Java.



<pre class="brush: java">
public String plusCount(String pageUrl) {

 String plusCount = "-1";

 StringBuilder postData =
 new StringBuilder("{\"method\":\"pos.plusones.get\",");
 postData.append("\"id\":\"p\",");
 postData.append("\"params\":");
 postData.append("{\"nolog\":true,");
 postData.append("\"id\":\"");
 postData.append(pageUrl);
 postData.append("\",");
 postData.append("\"source\":\"widget\",");
 postData.append("\"userId\":\"@viewer\",");
 postData.append("\"groupId":\"@self\"");
 postData.append("},");
 postData.append("\"jsonrpc\":\"2.0\",");
 postData.append("\"key\":\"p\",");
 postData.append("\"apiVersion\":\"v1\"}");

 StringBuilder response = new StringBuilder();

 try {
 URL url = new URL("https://clients6.google.com/rpc?"
 + "key=AIzaSyCKSbrvQasunBoV16zDH9R33D88CeLr9gQ");

 HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 connection.addRequestProperty("User-Agent", "Mozilla");
 connection.addRequestProperty("Content-Type", "application/json");
 connection.setRequestMethod("POST");

 connection.addRequestProperty("Content-Length", "" + postData.length());
 connection.setDoOutput(true);
 connection.setDoInput(true);

 DataOutputStream outputStream = new DataOutputStream(
 connection.getOutputStream());
 outputStream.writeBytes(postData.toString());

 outputStream.flush();
 outputStream.close();

 InputStream input = connection.getInputStream();
 BufferedReader reader = new BufferedReader(new InputStreamReader(input));

 String line;

 while ((line = reader.readLine()) != null) {
 response.append(line);
 }

 reader.close();

 } catch (IOException e) {
 // Do something about the error
 return plusCount;
 }

 try {

 Gson gs = new Gson();
 Map&lt;String, Map&lt;String, Object>> map = new HashMap();
 map = gs.fromJson(response.toString(), map.getClass());
 
 if (map != null) {
 Map&lt;String, Object> result = (Map&lt;String, Object>) map.get("result");
 Map&lt;String, Object> metaData = (Map&lt;String, Object>) result.get("metadata");
 if (metaData != null) {
 Map&lt;String, Object> globalCounts =
 (Map&lt;String, Object>) metaData.get("globalCounts");
 if (globalCounts != null) {
 Double C = (Double) globalCounts.get("count");
 plusCount = "" + C.intValue();
 }
 }
 }

 } catch (Exception e) {
 // return "-1";
 // Do something about the error
 }

 return plusCount;
}

</pre>



That's it, good luck.

How to get Google +1 pluses count in Java