web services Introduction

Introduction to web services:

 

TUTIORALS FROM MADHAV:

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    HIBERNATE-ANNOTATIONS     SPRING-IOC       SPRING –AOP-SCHEMABASED   

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY

     SPRING-DATA-JPA     REST-WEB-SERVICE     STRUTS2HIBERNATE    GWT.... 

1.What are web services?

2.Types of web servicesa

What are web services?

•   Web services are client and server applications that communicate over the World Wide Web (WWW) hyper text transfer protocol (HTTP)
•   As described by the www consortium (W3C), web services provide a standard means of interoperating between software applications running on a variety of platform and frameworks.
•  Web services are characterized by great interoperability and extensibility, as well as the machine-process able descriptions,
• Web services can be combined in a loosely coupled way to achieve complex operations.
•  Programs providing simple services can interactive with each other to deliver sophisticated added value services.

Types of web services:

The two types:

1.big web services

2.restful web services.

• In java, jax-ws provides the functionally for big web services.
•   Big web services use XML messages that follow the simple object access protocol (SOAP) standard, an xml language defining a message architecture and message formats.
•   Such systems often contain a machine-readable description of the operations offered by the service, written in the web services description language (WSDL),and xml language for defining interfaces syntactically.
•   The soap message format and the WSDL interface definition language have gained widespread adoption.
•  Many development tools, such as netbeans IDE, can reduce the complexity of developing web service applications. 
•   A SOAP –based design must include the following elements.
•   A format contract must be established to describe the interface that the web service offers.
• WSDL can be used to describe the details of the contract, which may include messages,Operations, bindings, and the location of the web services
•  In java EE6 ,JAX-RS provides the functionality for representational state transfer(restful) web services.
•   Rest is well suited for basic, ad hoc integration scenarios.
  
  
  

  
  

TUTIORALS FROM MADHAV:

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    HIBERNATE-ANNOTATIONS     SPRING-IOC       SPRING –AOP-SCHEMABASED   

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY

     SPRING-DATA-JPA     REST-WEB-SERVICE     STRUTS2HIBERNATE    GWT....

 Related topics:

• 
  
                1     Restful webservice json,spring dao
  
  

  2.     Restfulwebservice java, jquery, json,ajax example

  
  

  3.     Structr2 hibernate 3 integration example program

  
  

  4.     springmvc spring provided hibernate example

  
  

  5.     struct 2 spring dao

  
  

  6.     struts 2hibernate integration example 

     7. Jquery autocomplete from database restful webservice json,ajax

  
  
      8.     jax-rs say hai example program
  
  
       9.     jax-rs @pathparam example
  
  
       10.     jax rs @pathparam multiple value example
  
  
       11.     jax rs @Formparam  example

websevice jax ws rpc example

websevice jax-ws-rpc style:
-----------------------------------

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    HIBERNATE-ANNOTATIONS     SPRING-IOC       SPRING –AOP-SCHEMABASED   

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY

     SPRING-DATA-JPA     REST-WEB-SERVICE     STRUTS2HIBERNATE    GWT.... 

NOTE:   1)  maven dependeccy pom.xml  , we can get from previous example.
              

SayHaiService .java
--------------

package madhav;
import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;
import javax.jws.soap.SOAPBinding.Style;

@WebService
@SOAPBinding(style = Style.RPC)
public interface SayHaiService {
    @WebMethod
    public String sayHai(String hai);
   
}
SayHaiServiceImpl .java
---------------
package madhav;

import javax.jws.WebMethod;
import javax.jws.WebService;

@WebService(endpointInterface = "madhav.SayHaiService")
public class SayHaiServiceImpl implements SayHaiService{

    @Override
    @WebMethod
    public String sayHai(String hai) {
        return hai;
    }

}

Publish .java
--------------

package madhav;
import javax.xml.ws.Endpoint;
public class Publish {
    public static void main(String[] args) {
        Endpoint.publish("http://localhost:8080/webservice-JAX-WS-RPC/sayhai", new SayHaiServiceImpl());
        System.out.println("say hai service is published");
    }

}

Client .java
---------------

package madhav;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.ws.Service;
public class Client {
    public static void main(String[] args) {
        URL url = null;
        try {
            url = new URL("http://localhost:8080/webservice-JAX-WS-RPC/sayhai?wsdl");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }

        QName qname = new QName("http://madhav/",
                "SayHaiServiceImplService");

        Service service = Service.create(url, qname);

        SayHaiService sayHaiService = service.getPort(SayHaiService.class);

        System.out.println(sayHaiService.sayHai("hai how r u"));

    }

}

Related topics:

               1.  pring data jpa example program for insert

       2. spring data jpa example for delete

       3.  spring data jpa example for update

       4.  spring data jpa inheritance table for subclass

       5.  spring data jpa inheritance table for class

        6. spring data jpa onetoone

7.spring data jpa onetomany

       8. spring data jpa manytomany

TUTIORALS FROM MADHAV:

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    HIBERNATE-ANNOTATIONS     SPRING-IOC       SPRING –AOP-SCHEMABASED   

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY

     SPRING-DATA-JPA     REST-WEB-SERVICE     STRUTS2HIBERNATE    GWT....  

sprin mvc multiactioncontroller example

TUTIORALS FROM MADHAV:

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    HIBERNATE-ANNOTATIONS     SPRING-IOC       SPRING –AOP-SCHEMABASED   

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY  

Spring MVC "MultiActrionController"

Spring MVC:

Tepes of controllers:

1. ·         Controller 
2.           AbstractCommandController
3. ·         SimpleFormController
4. ·         WizardFormController
5. ·         MultiActionController

Ex 5:

// this example program willdescribes- MultiActionController

Index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

   

    <title>My JSP 'index.jsp' starting page</title>

               

                <link rel="stylesheet" type="text/css" href="styles.css">

                -->

  </head>

 

  <body bgcolor="wheat">

   This is my JSP page. <br>

    <a href="sayHai.spring">click hea to say hai</a><br>

     <a href="sayBye.spring">click hear to say bye</a><br>

      <a href="login.spring">click hear for login into softech </a><br>

  </body>

</html>

Hai.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

   

    <title>My JSP 'Hai.jsp' starting page</title>

   

               

                <link rel="stylesheet" type="text/css" href="styles.css">

                -->

  </head>

 

  <body bgcolor="wheat">

    hai this is madhav <br>welcome to softech<br>

  </body>

</html>

Login.jsp

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>Softech computer education</title>

<head>

<body bgcolor="wheat">

<form action="login.spring"><pre>

user name:<input type="text" name="uname"/>

password :<input type="password" name="pass"/>

  <input type ="submit" value="login"/>

</pre>

</form>

</body>

</html>

Bte.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

   

    <title>My JSP 'Bye.jsp' starting page</title>

   

               

                <link rel="stylesheet" type="text/css" href="styles.css">

                -->

  </head>

 

  <body bgcolor="wheat">

    Bye...............<br>

  </body>

</html>

StudentController.java

package madhav;

import org.springframework.web.servlet.*;

import org.springframework.web.servlet.mvc.*;

import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

import org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver;

import org.springframework.validation.*;

import javax.servlet.http.*;

public class StudentController extends MultiActionController{

                public ModelAndView sayHai(HttpServletRequest req,HttpServletResponse res)throws Exception

                {

                                                                return new ModelAndView("/Hai");

                }

                public ModelAndView sayBye(HttpServletRequest req,HttpServletResponse res)throws Exception

                {

                                                                return new ModelAndView("/Bye");

                }

                public ModelAndView login(HttpServletRequest req,HttpServletResponse res)throws Exception

                {

                                String type=(String)req.getParameter("name");

                                if(type==null)

                                                return new ModelAndView("/Login");

                                                else if(type.equals("hugo"))

                                                                return new ModelAndView("/hugo");

                                                else

                                                                return new ModelAndView("/UserHome");

                }

}

Servlet-dispatcher.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans

                xmlns="http://www.springframework.org/schema/beans"

                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

                xmlns:p="http://www.springframework.org/schema/p"

                xsi:schemaLocation="http://www.springframework.org/schema/beans

                http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

               

               

<bean id="viewResolver"

          class="org.springframework.web.servlet.view.InternalResourceViewResolver"

                                  p:prefix="/WEB-INF/jspfiles/" p:suffix=".jsp" />

    <bean name="/*.spring" class="madhav.StudentController">

                   </bean>

 </beans>                                       

Web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.4"

                xmlns="http://java.sun.com/xml/ns/j2ee"

                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

                xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

                http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" id="WebApp_ID">

                <display-name>speingmvcacc</display-name>

 

  <servlet>

<servlet-name>dispatcher</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>dispatcher</servlet-name>

<url-pattern>*.spring</url-pattern>

</servlet-mapping>

<welcome-file-list>

                <welcome-file>index.jsp</welcome-file>

</welcome-file-list>

</web-app>

Output screens:

 

click hear to download the above example program

 

 Related topics:

1.     spring mvc work flow

2.     spring mvc AbstractCommandControllerwork flow

3.     Spring MVC AbstractCommandController -Validation

4.     Spring MVC SimpleFormController workflow

5.     Spring MVC WizardFormController

6.  spring MVC annotations sa hai-mvc flow

7. Spring MVC annotations login validation

8. Spring MVC annotations working with form

 

TUTIORALS FROM MADHAV:

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    HIBERNATE-ANNOTATIONS     SPRING-IOC       SPRING –AOP-SCHEMABASED   

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY