Ensure you understand the difference between doc literal rpc format:
 
The URLs may look like:
Doc Literal: 
    https://mydomain.com/WebService?wsdl
 
RPC: 
    https://mydomain.com/WebService?wsdl=WebService.wsdl
 
The contents will look like:
 
Document Literal:
 
    <wsdl:definitions xmlns:ns1="http://mydomain.com/" xmlns:ns2="http://schemas.xmlsoap.org/soap/http" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://mydomain.com/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="WebService" targetNamespace="http://mydomain.com/">
      <wsdl:import location="http://mydomain.com/WebService?wsdl=WebService.wsdl" namespace="http://mydomain.com/"></wsdl:import>
      <wsdl:binding name="FormsServerWebServiceImplServiceSoapBinding" type="ns1:FormsServerWebService">
      <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
      <wsdl:operation name="MyAction">
      <soap:operation soapAction="" style="document"/>
      <wsdl:input name="MyAction">
        <soap:body use="literal"/>
      </wsdl:input>
...
 
This is RPC:
 
    <wsdl:definitions xmlns:ns1="http://mydomain.com/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="WebService" targetNamespace="http://mydomain.com/">
      <wsdl:types>
        <xs:schema xmlns:tns="http://mydomain.com/" xmlns:xs="http://www.w3.org/2001/XMLSchema" attributeFormDefault="unqualified" elementFormDefault="unqualified" targetNamespace="http://mydomain.com/">
        <xs:complexType name="myAction">
          <xs:sequence>
            <xs:element minOccurs="0" name="arg1" type="xs:string"/>
            <xs:element minOccurs="0" name="arg2" type="xs:string"/>
          </xs:sequence>
        </xs:complexType>
 
Note that you need to save the RPC version in your project. 
 
To generate the corresponding JAXB classes - use a maven pom.xml file like this:
 
    <?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>mygroup</groupId>
        <artifactId>myproject</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <packaging>jar</packaging>
 
    
        <build>
            <finalName>${project.artifactId}</finalName>
            <plugins>
                <plugin>
                    <groupId>org.jvnet.jaxb2.maven2</groupId>
                    <artifactId>maven-jaxb2-plugin</artifactId>
                    <version>0.8.3</version>
                    <executions>
                        <execution>
                            <id>my_wsdl</id>
                            <goals>
                                <goal>generate</goal>
                            </goals>
                            <configuration>
                                <wsdl>true</wsdl>
                                <schemaDirectory>${project.basedir}/src/main/resources/schema/</schemaDirectory>
                                <generateDirectory>${project.build.directory}/generated/java</generateDirectory>
                                <schemaIncludes>
                                    <include>wsdls/WebService.wsdl</include>
                                </schemaIncludes>
                                <bindingDirectory>${project.basedir}/src/main/resources/binding</bindingDirectory>
                                <bindingIncludes>
                                    <include>myjaxbbindings.xjb</include>
                                </bindingIncludes>
                                <forceRegenerate>true</forceRegenerate>
                                <args>
                                    <arg>-Xannotate</arg>
                                </args>
                                <plugins>
                                    <plugin>
                                        <groupId>org.jvnet.jaxb2_commons</groupId>
                                        <artifactId>jaxb2-basics</artifactId>
                                        <version>0.6.0</version>
                                    </plugin>
                                    <plugin>
                                        <groupId>org.jvnet.jaxb2_commons</groupId>
                                        <artifactId>jaxb2-basics-annotate</artifactId>
                                        <version>0.6.0</version>
                                    </plugin>
                                </plugins>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
 
                <plugin>
                    <groupId>org.codehaus.mojo</groupId>
                    <artifactId>build-helper-maven-plugin</artifactId>
                    <version>1.7</version>
                    <executions>
                        <execution>
                            <id>add-source</id>
                            <phase>generate-sources</phase>
                            <goals>
                                <goal>add-source</goal>
                            </goals>
                            <configuration>
                                <sources>
                                    <source>${project.build.directory}/generated/java</source>
                                </sources>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.0</version>
                    <configuration>
                        <source>1.7</source>
                        <target>1.7</target>
                        <debug>true</debug>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-jar-plugin</artifactId>
                    <version>2.6</version>
                    <configuration>
                        <includes>
                            <include>**/*.class</include>
                            <include>**/*.index</include>
                        </includes>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </project>
 
Then setup a JAXB binding file that looks like this:
    
    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <jaxb:bindings
            xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema"
            xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xmlns:annox="http://annox.dev.java.net"
            xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd"
            jaxb:extensionBindingPrefixes="xjc annox"
            version="2.1">
        <jaxb:bindings schemaLocation="../schema/wsdls/WebService.wsdl" node="//xs:schema">
            <jaxb:bindings node="xs:complexType[@name='myAction']">
                <annox:annotate>
                    <annox:annotate annox:class="javax.xml.bind.annotation.XmlRootElement" name="MyAction" namespace="http://mydomain.com/"/>
                </annox:annotate>
            </jaxb:bindings>
            <jaxb:bindings node="xs:complexType[@name='myActionResponse']">
                <annox:annotate>
                    <annox:annotate annox:class="javax.xml.bind.annotation.XmlRootElement" name="MyActionResponse" namespace="http://mydomain.com/"/>
                </annox:annotate>
            </jaxb:bindings>
        
Then generate the source using
 
    mvn generate-sources
    
Then setup a Java class to call the generated sources that looks like this:
 
    
    package com.mycompany;
    
    import com.mydomain.*;
    import com.mydomain.Exception;
    import org.springframework.oxm.jaxb.Jaxb2Marshaller;
    import org.springframework.ws.client.core.WebServiceTemplate;
    
    import javax.xml.bind.JAXBElement;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.util.List;
    
    
    public class CallWebServiceUsingWebServiceTemplate {
    
        public static void main(String args[]) {
            List<String> result = null;
    
            MyAction request = new ObjectFactory().createMyAction();
    
            request.setArg1("arg1");
 
            WebServiceTemplate webServiceTemplate = getWebServiceTemplate();
    
            JAXBElement elem = (JAXBElement)webServiceTemplate.marshalSendAndReceive(request);
            MyActionResponse response =
                    (MyActionResponse) elem.getValue();
    
            result = response.getReturn();
    
        }
    
        private static WebServiceTemplate getWebServiceTemplate() {
            WebServiceTemplate webServiceTemplate = new WebServiceTemplate();
    
            Jaxb2Marshaller marshaller1 = new Jaxb2Marshaller();
            marshaller1.setContextPath("com.mydomain");
    
            webServiceTemplate.setMarshaller(marshaller1);
            webServiceTemplate.setUnmarshaller(marshaller1);
    
            webServiceTemplate.setDefaultUri("https://mydomain.com/WebService");
            return webServiceTemplate;
        }
    }