Computer Software Paper Model 1: Research on Layering Technology in Computer Software Development
With the continuous improvement of information construction level, computer software has been widely used in this process. In addition, more and more attention has been paid to the development of computer software. Software development technology has been greatly improved in recent years, and layered technology is a very important one, so we need to conduct a comprehensive analysis and research on it.
Keywords: computer; Software development; Hierarchical technology
At present, the information age has quietly arrived, and the development of network technology makes people pay more and more attention to the software development industry. Computer software has gradually developed from the initial binary structure mode to the multi-layer structure mode, and middleware has become a very important issue affecting the quality and performance of application layer. In addition, it has also become a key technology in the development and application of computer software, and together with database and operating system, it has formed the basic computer software. The application of this technology can make the software system more extensible, and the flexibility and adaptability have been significantly improved in the process. Therefore, layered technology has been more and more widely used in modern computer software development.
1 computer layered software and its advantages
The ultimate goal of computer software engineering is to develop software products with better quality and performance. In this process, the construction and development of infrastructure can effectively provide very good conditions for the application of computer software. Components are highly cohesive software packages, which can be developed and processed more comprehensively as independent units. At the same time, it provides great convenience for the combination of components. Building a software system can effectively shorten the duration of software development and obtain more quality assurance. The most important purpose of component development is wide application, and a very important purpose of applying hierarchical software structure design method is to apply component technology more scientifically and reasonably. The software system is decomposed into different component modules, and the high-level components are usually regarded as components in the specified domain. Low-level components are only related to databases or physical hardware. Hierarchical division is a relatively broad concept, so there is no relatively unified and standardized standard in hierarchical relationship. The hierarchical relationship within different components is usually the relationship between superiors and subordinates. From a certain point of view, the systematic layering of computer software refers to the wide application of multi-level technology, and the fundamental reason is that software can be widely used. Hierarchical model can well demonstrate the scalability of software. The functional change of a certain layer of the system is only related to the upper and lower layers, and will not have a very obvious impact on other layers. The hierarchical model is also applicable to some standard organizations. In addition, it also controls the functional hierarchy interface to ensure that it is not severely restricted. The application of standard interface can make different software develop independently, and the later updated products can also be well integrated with other software.
2 Multi-level technical analysis in software development
2. 1 Technical analysis of two-story and three-story structures
In the two-tier mode, it generally consists of a server and a database client. Among them, the client can provide an operating interface for customers, and it also has a very good logical processing function. At the same time, it needs to complete the query of the database according to the instructions, while the server mainly receives the instructions from the client, and at the same time, it needs to complete the query of the database according to the instructions and return the query results. This logical processing structure is called fat client. This client-side two-tier technology can complete a lot of business logic processing in the application process. With the increase of the number of clients, its expansibility, interactive operation and communication performance will be affected, and there are also very obvious security problems and hidden dangers. With the continuous improvement of computer technology, the traditional two-tier technology can no longer meet the specific requirements of system application. In this case, there is a three-tier structure technology type, which is mainly composed of client, application server switch and application server. Among them, the client is mainly used to realize human-computer interaction, and the data server allows operators to access, store and optimize data information. The application of the server is mainly to complete the logical analysis of related businesses, which significantly reduces the working pressure of the client. We generally call such customers thin customers. Compared with the two-tier structure, the three-tier structure has strong repeatability, more convenient maintenance, and significantly enhanced security and scalability. But when the number of users is small, the advantages of the two-tier structure are more obvious. Therefore, in the process of software development, we must fully combine the actual situation and needs.
2.2 Four-layer structure technology
At present, the complexity of computer application environment has increased significantly, and customers have put forward higher and higher requirements for software systems, mainly in the aspects of short software development cycle, good system stability and strong expansibility. In order to meet the higher requirements put forward by users, in the development process, we comprehensively deal with the user interface and the business logic database server according to their functional modules, and separate different modules to minimize mutual influence. At this time, if you use three-tier technology, you can't achieve this function well. Many software developers will add a layer of database interface encapsulation in the process of interaction between database and logic layer, thus realizing the evolution from three layers to four layers. The four-tier architecture mainly includes web layer, business logic layer, data persistence layer and storage layer. Among them, the web layer can be developed using mode 1 or mode 2. In the mode 1, it is basically composed of JSP pages. After receiving the client's request, you can respond directly and use a small amount of Java to handle the related operations of the database. The mode 1 is relatively simple to implement and can be used for the rapid development of small-scale projects. The limitations of this model are also obvious. JSP page mainly plays the role of controller and view view, and its presentation and control logic are mixed into one. The related code reuse function is low, and the maintainability and expansibility of the application system are difficult, which is not suitable for complex application system development. Mode 2 is mainly based on the structure design of 1vlvc. JSP no longer assumes the responsibility of the controller. Sen}let, as a front-end controller, receives client requests and implements logical processing through Java, while JSP only plays the role of presentation layer and presents the results to users. This model is mainly suitable for the application and development of large-scale projects. The business logic layer is between the data persistence layer and the web layer, and is mainly responsible for transmitting the result data in the data persistence layer to the web layer. As the core of business processing, business logic layer plays a connecting role. The technology of business logic layer can be divided into two kinds of encapsulated business logic: JavaBean and EJB, in which EJB simplifies the development, configuration and execution of application systems written in Java language. However, EJB is not the only way to realize J2EE. Programs that support EJB applications can apply any distributed network protocol, such as JRMP. IIOP and proprietary protocols.
3 Conclusion
At present, the computer application environment in China is becoming more and more complex, and at the same time, the requirements of customers have been significantly improved. In order to better meet the requirements of software users, layered technology has been widely used in software development, and the previous two-tier technology model has been unable to adapt to the construction and development of today's era. After analyzing the advantages and disadvantages of two-tier and three-tier structure, the multi-tier structure system plays a very important role in the application process, which also makes the software development technology develop.
refer to
Jin Hongjun. Application of Standardization in Computer Software Development [J]. Internet of Things Technology, 20 16(0 1).
Zhao. Computer application software development technology [J]. Heilongjiang Science and Technology Information, 20 1 1(26).
[3] Lin and Wu. Research on the basic structure principle of computer software development [J]. Electronic Manufacturing, 20 16(Z 1).
Computer Software Paper Model 2: Application of Hierarchical Technology in Computer Software Development
In recent years, computer technology and network technology have been widely used in people's daily life and work. Computer development technology has been widely concerned by relevant practitioners. The author discusses the application of layered technology in computer software development to improve the level of computer software development.
Keywords computer; Software development; Hierarchical technology
1 preface
With the rapid development of science and technology and the gradual acceleration of modernization, the development of computer software has gradually changed from the traditional two-tier structure to the multi-tier structure. It has become an important content and component in the process of computer software development. In recent years, the network environment has become increasingly complex. Applying layered technology to computer software development can improve the overall clarity and identifiability of software system, provide flexible software application environment for people, and promote the sound and rapid development of computer R&D technology.
2 Overview of layered technology
2. 1 the concept and application of layered technology in the process of computer development, we should ensure the flexibility and reliability of the software and realize the multi-functional application of the software. Based on the internal structure principle of computer software, layered technology promotes the realization of various functions in the application process of computer software. Therefore, it has certain advantages to apply layered technology to computer software development. At the same time, it can change the traditional single business processing mode of computer software and realize the development and application of multi-level technology [1].
2.2 The characteristics of layered technology The application of layered technology in computer software development has corresponding characteristics and advantages. First of all, layered technology can expand the computer software and decompose the computer system according to the relevant functional requirements, realize the transformation and update of the computer software, and change and modify the functional layers and upper and lower layers in the system. Secondly, layered technology can improve the quality and efficiency of computer software development, and also improve the reliability of its software operation. By reforming and changing the original computer system, the development time of complex software can be shortened and the quality of new products can be improved. Thirdly, the application of layered technology in computer software development can make full use of computer software, define the interface of functional layer, realize the automatic development of software, and promote the standard interface and seamless application of its ports [2].
Application of Hierarchical Technology in Computer Software Development
In recent years, with the innovation of life concept, people began to pay attention to the development of computer software. At the same time, computer software development has also changed the traditional single business processing mode of computer software, making it change to multi-level computer software development. At present, computer software development technology has changed from the original two-tier and three-tier technology to multi-tier technology.
3. 1 application of double-layer technology
The application of two-tier technology in computer software development can improve the quality and efficiency of computer software development. Two-tier technology consists of two endpoints: client and server. The function of the client is to provide the user with the corresponding interface and handle the relevant logical relations in the daily application of the computer. The server is mainly used to receive customer information, integrate user-related information and transmit it to the client.
3.2 Application of Three-tier Technology
Three-tier technology is a two-tier technology that is constantly improved in the process of computer development. Compared with the traditional two-tier technology, the three-tier technology can ensure the increase of application servers to a certain extent, and also improve the quality and efficiency of user data storage. The application of three-tier technology in the development of computer software can improve the efficiency of computer information access, ensure the harmonious relationship between computers and people, ensure the improvement of the overall running quality of computers, and provide people with a good computer application environment. The three-layer technology includes business processing layer, interface layer and data layer. The main purpose of the business processing layer is to understand the needs of users and process related data in combination with the needs of users. The interface layer mainly collects users' requirements, processes them, and passes relevant results to the business processing layer. The data layer is mainly used to audit the relevant requests of the business processing layer, and use the database to query and integrate relevant information resources. Coupled with scientific analysis, it is passed on to the business layer. Three-tier technology can improve the performance of computer, but its user environment is more complex, which increases the difficulty of information and data processing [3].
3.3 Application of Four-layer Technology
Four-tier technology is improved on the basis of three-tier technology, including business processing layer, web layer, database layer and storage layer. Its application principle in the process of computer software development is that the business processing layer is used to analyze the user's needs, the processing results of the data layer are passed to the web layer, and the data exchange and data access codes are used to reflect the relationship between the database and computer objects.
3.4 Application of Middleware Technology
Middleware technology is developed as an object-oriented technology. Middleware is an independent system software, which mainly realizes the application functions of interoperability, interconnection and resource sharing based on distributed computing environment. It can shield the details of various complex technologies brought by heterogeneous and distributed integration and reduce the technical difficulty. The application of middleware among operating system, database and application software can shorten the development cycle and improve the security of system and software operation. There are many kinds of middleware. Combined with its related technical characteristics, it can be divided into DM, MOM, OOM middleware, RPC and TPM middleware. It has been widely used in the practical development of computer software.
3.4. 1 Message Middleware can be applied to both synchronous and asynchronous information transmission. MOM can realize asynchronous communication, message queuing and safety and reliability in delivery. MOM layered technology is widely used in the development of computer software technology. Application message queue middleware is used for application programming, and indirect communication with each other is mainly realized through middleware. At the same time, it can use the queue manager to communicate with remote or local applications. In the communication process, both parties only need to deliver the message to the queue manager, without paying too much attention to the message delivery process and delivery security, which is conducive to simplifying the software development process.
3.4.2 Remote Procedure Call Middleware It is more advanced and practical to apply remote procedure call middleware at the client and server computing levels. Programmers can write related applications according to the actual needs of customers. RPC is flexible, it can also adapt to the complex computer environment, and support cross-platform applications, calling remote subroutines to meet the relevant details in the programming process. However, there are still corresponding defects in the application process. It adopts synchronous communication mode, which is not conducive to large-scale use. Network failure, flow control and other factors need to be considered.
3.4.3 Object-oriented middleware component technology is widely used in large-scale application software, and distributed systems integrate new components and old components of different system platforms at each node. Because of various problems, it has certain limitations in the use process and can not fully play its role. Based on object technology and distributed technology, object-oriented middleware provides a new communication mechanism, which can meet the related requirements of transferring objects in heterogeneous distributed computing environment. Its source is mainly local or remote server.
4 conclusion
The application environment of computer is becoming more and more complex, and the related requirements of users are gradually improving, which increases the difficulty of software development. The application of layered technology and continuous optimization in computer software development can realize its security and scalability, shorten the development cycle, improve its overall processing capacity and effectively meet the daily application needs of customers.
References:
Li Dayong. Research and Analysis on the Application of Hierarchical Technology in Computer Software [J]. Computer CD Software and Application, 20 14, (20): 78 ~ 79.
[2] Yang Boning. On layered technology in computer software development [J]. Science and Technology Wind, 20 15, (08):95.
[3] Jia Hui. On the application of layered technology in computer software development [J]. China High-tech Enterprise, 20 15, (30): 59 ~ 60.
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