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This post will explain how to consume SOAP based web services on Google App Engine platform. Keep your wsdl files in resources/wsdl folder Make these files entry in appengine-web.xml like   <static-files>        <include path="/**.wsdl"/>      <include path="/**.WSDL"/>  </static-files>  Now update POM file for wsdl to java plugin  <plugin>     <groupId>org.apache.cxf</groupId>     <artifactId>cxf-codegen-plugin</artifactId>     <version>3.0.1</version>     <executions>         <execution>             <id>generate-sources</id>             <phase>generate-sources</phase>             <configuration>                              <sourceRoot>${basedir}/src/main/java</sourceRoot>                 <wsdlOptions>                     <wsdlOption>                           <wsdl>src/main/resources/wsdl/ReadData.wsdl</wsdl>  

This is a post which shows how to convert pfx file into jks. Prerequisites : Java 6+ Step 1: Use cmd with java in your classpath keytool -importkeystore -srckeystore testKey.pfx -srcstoretype pkcs12 -srcalias <myAliasName>  -destkeystore jksFile -deststoretype jks -deststorepass password -destalias <alias>

This is an example to explain  how to authenticate java stub client with certification and send request to SOAP WSDL. public static void applyCertificateAuthentication(MyWsdlDataRequest wsdlClientRequest)             throws Exception {        String keyStoreLocation="resources/keys/testKey.jks";        String password="key@12345";         ClassLoader classLoader = this.class.getClassLoader();         InputStream keyInputStream = classLoader.getResourceAsStream(keyStoreLocation);         SSLContext sc = SSLContext.getInstance("SSLv3");         KeyManagerFactory factory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());         KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());         keyStore.load(keyInputStream, password.toCharArray());         factory.init(keyStore, password.toCharArray());         sc.init(factory.getKeyManagers(), null, null);                       MyWsdlService serviceImpl = new MyWsdlSer