Create a WebService in a simple way

Steps to write a Web Service :


1. Write the business implementation class under a package.


HelloWorld.java


package news;


public final class HelloWorld


{


public String sayHello(String s)


{


System.out.println("HelloWorld from your WebService");


System.out.println("This message brought to you by " + s);


return "Hello " + s;


}


}



2. compile the file

eg : javac –classpath . HelloWorld.java –d .


3. save the following build.xml file under the current working folder build.xml


targetNamespace="http://localhost/webservices/hello"


serviceName="HelloWorld"


serviceURI="/HelloWorld"


generateTypes="True"


expandMethods="True">


4. set the classpath as per the following command

set classpath=%classpath%;c:\bea\jdk141_03\lib\tools.jar;c:\bea\weblogic81\server\lib\weblogic.jar;c:\bea\weblogic81\server\lib\weblogic_sp.jar;c:\bea\weblogic81\server\lib\webservicesclient.jar;c:\bea\weblogic81\server\lib\webservices.jar;


5. Run the ant tool to generate an HelloWorld.ear file

eg: java -classpath .;%classpath% org.apache.tools.ant.Main


6. Deploy the ear file with the application server through console application


7. Write the client application


Client.java


import news.*;




public class Client


{


public static void main(String[] args) throws Exception


{


String service_url =


"http://localhost:7001/webservices/HelloWorld?WSDL";


System.out.println(service_url);


HelloWorld_Impl h = new HelloWorld_Impl(service_url);


HelloWorldPort port =


h.getHelloWorldPort();


String result = port.sayHello(args[0]);


System.out.println(result);


}


}


8. Save the following build.xml file under the same folder where the client app is existing

packageName="news"


clientJar="myclient.jar">


9. Run the following ant command to generate myclient.jar file

eg: java -classpath .;%classpath% org.apache.tools.ant.Main


10. Compile the client application by keeping the myclient.jar file in the classpath

javac -classpath .;myclient.jar;%classpath% Client.java


11. Run the client application to test the web service

java -classpath .;myclient.jar;%classpath% Client John