frameworks in Java to implement SOAP
Several frameworks in Java can be used to implement SOAP web services. Here are some of the most popular ones:

Table of Contents
1. Â JAX-WS (Java API for XML Web Services) :
- A part of the Java EE platform, JAX-WS is the standard API for building SOAP web services in Java.
- It simplifies the development of web services using annotations and provides tools for generating WSDL and client artifacts.
2. Â Apache CXF :
- Apache CXF is an open-source services framework that helps you build and develop services using frontend programming APIs like JAX-WS and JAX-RS.
- It provides extensive support for web service standards and protocols.
3. Â Spring-WS (Spring Web Services) :
- Spring-WS is a product of the Spring community, specifically designed for creating document-driven web services.
- It provides flexible mapping of web service requests to endpoints and supports various XML handling techniques.
4. Â Axis2 (Apache Axis2) :
- Axis2 is a core engine for web services that provides robust support for SOAP and RESTful web services.
- It offers a wide range of features, including high performance, extensibility, and support for multiple transport protocols.
Explanation in Java Example
Let’s create a simple SOAP web service using JAX-WS and Apache CXF to demonstrate how to implement SOAP web services using these frameworks.
1. Maven Dependencies (pom.xml)
xml
<dependencies>
<dependency>
<groupId>javax.xml.ws</groupId>
<artifactId>jaxws-api</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>com.sun.xml.ws</groupId>
<artifactId>jaxws-rt</artifactId>
<version>2.3.1</version>
</dependency>
</dependencies>
2. Service Implementation (CalculatorService.java)
java
import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.xml.ws.Endpoint;
@WebService
public class CalculatorService {
@WebMethod
public int add(int a, int b) {
return a + b;
}
@WebMethod
public int subtract(int a, int b) {
return a - b;
}
public static void main(String[] args) {
Endpoint.publish("http://localhost:8080/ws/calculator", new CalculatorService());
}
}
3. Running the Service :
Run the CalculatorService class to publish the web service. The service will be available at http://localhost:8080/ws/calculator.
1. Maven Dependencies (pom.xml)
xml
<dependencies>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-frontend-jaxws</artifactId>
<version>3.4.3</version>
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-transports-http</artifactId>
<version>3.4.3</version>
</dependency>
</dependencies>
2. Service Implementation (CalculatorService.java)
java
import javax.jws.WebMethod;
import javax.jws.WebService;
import org.apache.cxf.jaxws.JaxWsServerFactoryBean;
@WebService
public class CalculatorService {
@WebMethod
public int add(int a, int b) {
return a + b;
}
@WebMethod
public int subtract(int a, int b) {
return a - b;
}
public static void main(String[] args) {
CalculatorService service = new CalculatorService();
JaxWsServerFactoryBean factory = new JaxWsServerFactoryBean();
factory.setServiceClass(CalculatorService.class);
factory.setAddress("http://localhost:8080/ws/calculator");
factory.setServiceBean(service);
factory.create();
}
}
3. Running the Service :
Run the CalculatorService class to publish the web service. The service will be available at http://localhost:8080/ws/calculator.
Explanation
- 1. Â JAX-WS Example :
- The CalculatorService class defines a simple web service with two methods: add and subtract. These methods are annotated with @WebMethod, indicating they are exposed as web service operations.
- The Endpoint.publish method publishes the web service at the specified URL.
- 2. Â Apache CXF Example :
- The CalculatorService class is similar to the JAX-WS example but uses Apache CXF to publish the web service.
- The JaxWsServerFactoryBean is used to create and publish the web service at the specified URL.