Add query parameters to a GetMethod (using Java commons-httpclient)?

Question

I followed this other SO question to set parameter for the URL but it was giving error:

The method setQueryString(String) in the type HttpMethodBase is not applicable for the arguments (NameValuePair[])

and

Cannot instantiate the type NameValuePair.

I am not able to understand the actual problem. Could some one help me on this?

The code I have used from the above question

GetMethod method = new GetMethod("example.com/page";); 
method.setQueryString(new NameValuePair[] { 
    new NameValuePair("key", "value") 
});

Did u remove the superfluous semi-colon here `"example.com/page";` — vikingsteve, Apr 26 '13 at 07:43
Are you using httpclient 3.x or 4.x? The example you give is typical 3.x code, not 4.x. — NilsH, Apr 26 '13 at 07:43
Vikingsteve removed that semi-colon already when excuting the code — Java Questions, Apr 26 '13 at 07:46
Great NilsH i am using 4.x.:). How to set parameters when using 4.x ? — Java Questions, Apr 26 '13 at 07:46
@Anto sure? There is no GetMethod class in 4.x version. According to javadoc it is HttpGet — Vasyl Keretsman, Apr 26 '13 at 07:47

score 13 · Accepted Answer · answered Apr 26 '13 at 07:52

13

In HttpClient 4.x, there is no GetMethod anymore. Instead there is HttpGet. Quoting an example from the tutorial:

Query parameters in the url:

HttpGet httpget = new HttpGet(
 "http://www.google.com/search?hl=en&q=httpclient&btnG=Google+Search&aq=f&oq=");

Creating the query string programatically:

URIBuilder builder = new URIBuilder();
builder.setScheme("http").setHost("www.google.com").setPath("/search")
    .setParameter("q", "httpclient")
    .setParameter("btnG", "Google Search")
    .setParameter("aq", "f")
    .setParameter("oq", "");
URI uri = builder.build();
HttpGet httpget = new HttpGet(uri);
System.out.println(httpget.getURI());

answered Apr 26 '13 at 07:52

NilsH

13,705
4
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I should also add that httpclient 4.x and httpclient 3.x have quite different APIs. Examples you find for httpclient 3.x will most likely not work with 4.x. – NilsH Apr 26 '13 at 08:07
I am trying to use HTTPclient 4.2.5 with SalesForce REST API and it does not work - setting parameter results in an error page, while using "setQueryString" with 3.1 API results in JSON... Any clues? – Daniil Shevelev Jul 05 '13 at 20:12

score 1 · Answer 2 · answered Jul 09 '14 at 22:50

Interfaces can not be directly instantiated, you should instantiate classes that implements such Interfaces.

Try this:

NameValuePair[] params = new BasicNameValuePair[] {
        new BasicNameValuePair("param1", param1),
        new BasicNameValuePair("param2", param2),
};

Anurag Tripathi · Answer 3 · 2013-04-26T10:10:53.260

0

You can pass query parameter within the the url.

String uri = "example.com/page?key=value";
HttpClient httpClient = new DefaultHttpClient();
HttpGet method = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(method);
BufferedReader br = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
String content="", line;
while ((line = br.readLine()) != null) {
     content = content + line;
}
System.out.print(content);

edited Apr 26 '13 at 10:10

answered Apr 26 '13 at 07:49

Anurag Tripathi

1,208
1
12
31

There is no GetMethod in the version i have used, Please have a look at the comments i have provided – Java Questions Apr 26 '13 at 07:50
1

I changed my answer according to your httpclient 4.x – Anurag Tripathi Apr 26 '13 at 10:11

Add query parameters to a GetMethod (using Java commons-httpclient)?

3 Answers3