Generate WSDL First using -clientjar option. Also unzips the modified artifacts to be packaged in the WAR

maven-jaxws-plugin_withClientJar.xml

<build>
        <plugins>
            <plugin>
                <!--
                    Generates JAXWS classes for all of the WSDL files in $[project.base.dir}/src/wsdl.
                -->
                <groupId>org.jvnet.jax-ws-commons</groupId>
                <artifactId>jaxws-maven-plugin</artifactId>
                <version>2.3</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>wsimport</goal>
                        </goals>
                        <configuration>
                            <args>
                                <arg>-clientjar</arg>
                                <arg>${project.build.directory}/wsimport-client.jar</arg>
                            </args>
                            <wsdlUrls>
                                <wsdlUrl>https://webservice.com/service.wsdl</wsdlUrl>
                            </wsdlUrls>
                        </configuration>
                    </execution>
                </executions>
                <configuration>
                    <target>2.1</target>
                    <verbose>true</verbose>
                </configuration>
            </plugin>
            <plugin>
                <!--
                    Unjar the wsimport-client.jar created in the jaxws-maven-plugin to the WAR's classes folder
                -->
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-antrun-plugin</artifactId>
                <version>1.7</version>
                <executions>
                    <execution>
                        <phase>process-resources</phase>
                        <configuration>
                            <target>
                                <unzip src="${project.build.directory}/wsimport-client.jar" dest="${project.build.directory}/classes" />
                            </target>
                        </configuration>
                        <goals>
                            <goal>run</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>