Getting java classes from multiple wsdls

Have you looked at XJC bindings, there are some notes on the Oracle site and if you are happy with the CXF plugin you can pass a separate bindings file for each WSDL using the code you can see in example one on the plugin's site.

An example fragment from the plugin configuration:

...
<configuration>
   <wsdlOptions>
      <wsdlOption>
          <wsdl>${basedir}/src/main/resources/wsdl/first.wsdl</wsdl>
          <bindingFiles>
              <bindingFile>${basedir}/src/main/resources/first.xjb</bindingFile>
          </bindingFiles>
      </wsdlOption>
      <wsdlOption>
          <wsdl>${basedir}/src/main/resources/wsdl/second.wsdl</wsdl>
          <bindingFiles>
              <bindingFile>${basedir}/src/main/resources/second.xjb</bindingFile>
          </bindingFiles>
      </wsdlOption>
   </wsdlOptions>
</configuration>
...

Where first.xjb would contain:

<jaxws:bindings wsdlLocation="path/to//serviceOne.wsdl"
      xmlns:jaxws="http://java.sun.com/xml/ns/jaxws"
      xmlns:xs="http://www.w3.org/2001/XMLSchema"
      xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
      xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
<jaxws:bindings node="wsdl:definitions/wsdl:types/xs:schema">
    <jxb:globalBindings xmlns:jxb="http://java.sun.com/xml/ns/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema">
        ...
    </jxb:globalBindings>

    <jxb:schemaBindings xmlns:jxb="http://java.sun.com/xml/ns/jaxb">
        <jxb:package name="your.first.package"/>
    </jxb:schemaBindings>
  </jaxws:bindings>
</jaxws:bindings>

Now you can configure all manner of translations and mappings.

With a jaxb binding file, you can change the package (see this documentation).

If you're using maven and the cxf plugin, you can add this to your pom.xml:

      <plugin>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-codegen-plugin</artifactId>
            <version>${cxf.version}</version>
            <executions>
                <execution>
                    <id>generate-sources</id>
                    <phase>generate-sources</phase>
                    <configuration>
                        <wsdlOptions>
                            <wsdlOption>
                                <wsdl><path_to_wsdl</wsdl>
                                <frontEnd>jaxws21</frontEnd>
                                <faultSerialVersionUID>1</faultSerialVersionUID>
                                <bindingFiles>
                                    <bindingFile>src/main/resources/binding.xml</bindingFile>
                                </bindingFiles>
                            </wsdlOption>
                        </wsdlOptions>
                    </configuration>
                    <goals>
                        <goal>wsdl2java</goal>
                    </goals>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>org.jvnet.jaxb2_commons</groupId>
                    <artifactId>jaxb2-fluent-api</artifactId>
                    <version>3.0</version>
                </dependency>
                <dependency>
                    <groupId>org.jvnet.jaxb2_commons</groupId>
                    <artifactId>jaxb2-basics</artifactId>
                    <version>0.6.4</version>
                </dependency>
            </dependencies>
        </plugin>

The documentation states you can use the <extraarg> element to pass in parameters to the wdsl to java process. So, you can configure your cxf-codegen-plugin in the following manner

<configuration>
    <sourceRoot>${project.build.directory}/generated-code/mywebservice</sourceRoot>
    <wsdlOptions>
        <wsdlOption>
            <wsdl>${basedir}/src/main/resources/wsdl/serviceOne.wsdl</wsdl>
            <extraargs>
                <extraarg>-p</extraarg>
                <extraarg>first.packagename</extraarg>
            </extraargs>
        </wsdlOption>
        <wsdlOption>
            <wsdl>${basedir}/src/main/resources/wsdl/serviceTwo.wsdl</wsdl>
                <extraargs>
                <extraarg>-p</extraarg>
                <extraarg>another.packagename</extraarg>
            </extraargs>
        </wsdlOption>
    </wsdlOptions>
</configuration>