Problem encoding GET parameters with '+' character

Hello,

I am using wsdl2java tool to generate a Java client to access a REST web
service described with a WSDL 2.0. I am using these options:

<plugin>
    <groupId>org.apache.axis2</
groupId>
    <artifactId>axis2-wsdl2code-maven-plugin</artifactId>
    <version>1.6.2</version>
    <configuration>
        <packageName>com.interoud.vodkatv.wsdl</packageName>
        <wsdlFile>src/main/wsdl/vodkatv.wsdl</wsdlFile>
        <wsdl-version>2</wsdl-version>
        <unwrap>true</unwrap>
        <wsdlVersion>2</wsdlVersion>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>wsdl2code</goal>
            </goals>
        </execution>
    </executions>
</plugin>

The generated client works ok, except when I invoke a GET operation with a
parameter that contains the symbol '+'. For example, if I have an URL
"/get_url", and I set the parameter "param" to "x+x", the symbol "+" is not
encoded, and therefore it is interpreted as a space on my server ("x x").
If I try to send the parameter encoded, i.e., "%2B", I received "%252B" in
my server. Am I doing anything wrong? Thank you for your help.

Regards