通过httpclient 3.x模拟HTTP POST以获取多个选项

Question

I want to emulate a HTTP POST using application/x-www-form-urlencoded encoding to send a option group that allows multiple selections.

<select name="groups" multiple="multiple" size="4">
    <option value="2">Administration</option>
    <option value="1">General</option>
</select>

Does adding 2 NameValuePairs (NVP) with the same name work ? My serverside log shows that only the first NVP was received.

eg

PostMethod method = ...;
NameValuePair[] nvpairs = {
    new NameValuePair( "groups", "2" );
    new NameValuePair( "groups", "1" );
};
method.addParameter( nvpairs );

Only the groups=1 parameter was received. Thanks

Answer 1

More likely is that your server code is calling ServletRequest.getParameter() rather than getParameterValues() .

But the best way to verify is use an HTTP proxy such as Fiddler to look at the actual request.

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Edit: the correct HttpClient method is addParameters() , not addParameter() -- your code shows the latter, but I don't believe it would compile so am assuming you copied incorrectly.