Develop WebService with J2EE

I. Summary
XML-based Web services are a new specification developed with reference to the B2B communication and collaboration model. It provides a conceptual and structured basis for different platforms and products. Now, developers can use J2EE technology to develop XML-based Web services. They can use the existing J2EE technology to develop complete, XML-compliant, and fully-common WEB services. Developers can build complex and powerful Web service applications without re-designing or constructing existing J2EE systems.
II. Introduction Web service is a lightweight and independent communication technology that can receive requests from other systems on the Internet or Intranet. This technology allows all systems on the network to interact. With the development of technology, a Web service can contain additional specified functions and can collaborate and communicate in multiple B2B applications.
Web services are constantly being improved and implemented in a very intelligent and dynamic way. These flexible Web services can understand the context relationship in the request and generate dynamic results under each specific situation. These services change the processing based on the user's identity, location, and cause of the request to generate a unique and customized solution. This collaboration mechanism is completely transparent to users who are only interested in the final result.
The XML standards followed by such Web services can improve the performance of transaction communication. Developers can use different platforms, products, and standards to implement many possibilities. With this standard, developers can establish a system that enables their Web services to provide maximum collaborative capabilities.
This white paper describes how to easily use Java and XML technologies to implement the Web service architecture. It illustrates every key part of the Web service and how to combine them. You will have a deeper understanding of the XML-based Web service structure and how to combine it with J2EE, starting from how to build a Web service using J2EE. This section gives you an understanding of how to build a Web service.
III. Summary in general, electronic communication and collaboration between different transactions will be a lot of obstacles. Different systems, security restrictions, and different data formats lead many B2B systems to become unique in their own fields or customer groups. Web services will change all of this, making it possible for different transactions to communicate with each other. It is worth noting that this will reduce the development and maintenance costs for building commercial sites.
When creating a Web service, there are three main steps:
1. Establish client connections to allow Applets, Applications, business partners, browsers and PDAs to use Web services.
2. Web services include workflows, data transmission, business logic, and data access. These functions are hidden behind Web services and work for clients.
3. Connect to the background system. This system may include one or more databases, existing enterprise information systems, systems or Web services of business partners, and data shared among multiple systems.