alluvial软件工程本科毕业外文文献翻译

学校代码：

10128

学

号：

本科毕业设计外文文献翻译

二

〇

一

五

年

一

月

内蒙古工业大学本科毕业设计外文文献翻译

The Test Library Management System of

Framework Based on SSH

The application system features in small or medium- sized enterprise lie in the gre

ater flexibility and safety high performance-price ratio. Traditional J2EE framework c

an not adapt to these needs, but the system application based on SSH(Struts+Spring+

Hibernate) technology can better satisfy such needs. This paper analyses some integra

tion theory and key technologies about SSH, and according to the integration construc

ts a lightweight WEB framework, which has integrated the three kinds of technology ,

forming the lightweight WEB framework based on SSH and gaining good effects in p

ractical applications.

Introduction

Generally the J2EE platform[27] used in large enterprise applications, can well s

olve the application of reliability, safety and stability, but its weakness is the price hig

h and the constructing cycle is long. Corresponding to the small or medium enterprise

applications, the replace approach is the system framework of lightweight WEB, inclu

ding the more commonly used methods which are based on the Struts and Hibernate.

With the wide application of Spring, the three technology combination may be a bette

r choice as a lightweight WEB framework. It uses layered structure and provides a go

od integrated framework for Web applications at all levels in minimizing the Interlaye

r coupling and increasing the efficiency of development. This framework can solve a l

ot of problems, with good maintainability and scalability. It can solve the separation o

f user interface and business logic separation, the separation of business logic and data

base operation and the correct procedure control logic, etc. This paper studies the tech

nology and principle of Struts and Spring and Hibernate, presenting a proved lightwei

ght WEB application framework for enterprise.

Hierarchical Web Mechanism

Hierarchical Web framework including the user presentation layer, business logic

layer, data persistence layer ,expansion layer etc, each layer for different function, res

pectively to finish the whole application. The whole system are divided into different l

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内蒙古工业大学本科毕业设计外文文献翻译

ogic module with relatively independent and mutual, and each module can be implem

ented according to different design. It can realize the system parallel development, rap

id integration, good maintainability, scalability.

Struts MVC Framework

To ensure the reuse and efficiency of development process, adopting J2EE techn

ology to build the Web application must select a system framework which has a good

performance . Only in this way can we ensure not wasting lots of time because of adju

sting configuration and achieve application development efficiently and quickly. So, p

rogrammers in the course of practice got some successful development pattern which

proved practical, such as MVC and O/R mapping, etc; many technologies, including S

truts and Hibernate frameworks, realized these pattern. However, Struts framework on

ly settled the separation problem between view layer and business logic layer, control

layer, did not provide a flexible support for complex data saving process. On the contr

ary, Hibernate framework offered the powerful and flexible support for complex data

saving process. Therefore, how to integrate two frameworks and get a flexible, low-co

upling solutions project which is easy to maintain for information system, is a researc

h task which the engineering staff is studying constantly.

Model-View-Controller (MVC) is a popular design pattern. It divides the interact

ive system in three components and each of them specializes in one task. The model c

ontains the application data and manages the core functionality. The visual display of t

he model and the feedback to the users are managed by the view. The controller not o

nly interprets the inputs from the user, but also dominates the model and the view to c

hange appropriately. MVC separates the system functionality from the system interfac

e so as to enhance the system scalability and maintainability. Struts is a typical MV

C frame[32], and it also contains the three aforementioned components. The model le

vel is composed of JavaBean and EJB components. The controller is realized by actio

n and ActionServlet, and the view layer consists of JSP files. The central controller co

ntrols the action execution that receives a request and redirects this request to the appr

opriate module controller. Subsequently, the module controller processes the request a

nd returns results to the central controller using a JavaBean object, which stores any o

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内蒙古工业大学本科毕业设计外文文献翻译

bject to be presented in the view layer by including an indication to module views that

must be presented. The central controller redirects the returned JavaBean object to th

e main view that displays its information.

Spring Framework technology

Spring is a lightweight J2EE application development framework, which uses the

model of Inversion of Control(IoC) to separate the actual application from the Config

uration and dependent regulations of the application. Committed to J2EE application a

t all levels of the solution, Spring is not attempting to replace the existing framework,

but rather

“welding”

the object of J2EE application at all levels together through the P

OJO management. In addition, developers are free to choose Spring framework for so

me or all, since Spring modules are not totally dependent.

As a major business-level detail, Spring employs the idea of delay injection to as

semble code for the sake of improving the scalability and flexibility of built systems.

Thus, the systems achieve a centralized business processing and reduction of code reu

se through the Spring AOP module.

Hibernate Persistent Framework

Hibernate is a kind of open source framework with DAO design patterns to achie

ve mapping(O/R Mapping) between object and relational database.

During the Web system development, the tradition approach directly interacts wit

h the database by JDBC .However, this method has not only heavy workload but

also complex SQL codes of JDBC which need to revise because the business logic sli

ghtly changes. So, whatever development or maintain system are inconvenient. Consi

dering the large difference between the object-oriented relation of java and the structu

re of relational database, it is necessary to introduce a direct mapping mechanism bet

ween the object and database, which this kind of mapping should use configuration fil

es as soon as possibility, so that mapping files will need modifying rather than java so

urce codes when the business logic changes in the future. Therefore, O/R mapping pat

tern emerges, which hibernate is one of the most outstanding realization of architectur

e.

3

内蒙古工业大学本科毕业设计外文文献翻译

It encapsulates JDBC with lightweight , making Java programmer operate a relati

onal database with the object oriented programming thinking. It is a a implementation

technology in the lasting layer. Compared to other lasting layer technology such as JD

BC, EJB, JDO, Hibernate is easy to grasp and more in line with the object-oriented pr

ogramming thinking. Hibernate own a query language (HQL), which is fully object-or

iented. The basic structure in its application as shown in figure6.1.

Hibernate is a data persistence framework, and the core technology is the object /

relational database mapping(ORM). Hibernate is generally considered as a bridge bet

ween Java applications and the relational database, owing to providing durable data se

rvices for applications and allowing developers to use an object-oriented approach to t

he management and manipulation of relational database. Furthermore, it furnishes an

object-oriented query language-HQL.

Responsible for the mapping between the major categories of Java and the relatio

nal database, Hibernate is essentially a middle ware providing database services. It su

pplies durable data services for applications by utilizing databases and several profiles

, such as hibernate properties and XML Mapping etc..

Web services technologies

The

introduction

of

annotations

into

Java

EE

5

makes

it

simple

to

create

sophisticated Web service endpoints and clients with less code and a shorter learning

curve than was possible with earlier Java EE versions. Annotations

—

first introduced

in Java SE 5

—

are modifiers you can add to your code as metadata. They don't affect

program semantics directly, but the compiler, development tools, and runtime libraries

can process them to produce additional Java language source files, XML documents,

or other artifacts and behavior that augment the code containing the annotations (see

Resources

). Later in the article, you'll see how you can easily turn a regular Java class

into a Web service by adding simple annotations.

Web application technologies

Java EE 5 welcomes two major pieces of front-end technology

—

JSF and JSTL

—

into

the

specification

to

join

the

existing

JavaServer

Pages

and

Servlet

4

内蒙古工业大学本科毕业设计外文文献翻译

specifications.

JSF

is

a

set

of

APIs

that

enable

a

component-based

approach

to

user-interface

development.

JSTL

is

a

set

of

tag

libraries

that

support

embedding

procedural

logic,

access

to

JavaBeans,

SQL

commands,

localized

formatting

instructions, and XML processing in JSPs. The most recent releases of JSF, JSTL, and

JSP

support

a

unified

expression

language

(EL)

that

allows

these

technologies

to

integrate more easily (see Resources).

The cornerstone of Web services support in Java EE 5 is JAX-WS 2.0, which is a

follow-on

to

JAX-RPC 1.1.

Both

of

these

technologies

let

you

create

RESTful

and

SOAP- based

Web

services

without

dealing

directly

with

the

tedium

of

XML

processing and data binding inherent to Web services. Developers are free to continue

using

JAX-RPC

(which

is

still

required

of

Java

EE

5

containers),

but

migrating

to

JAX-WS is strongly recommended. Newcomers to Java Web services might as well

skip JAX-RPC and head right for JAX-WS. That said, it's good to know that both of

them support SOAP 1.1 over HTTP 1.1 and so are fully compatible: a JAX-WS Web

services client can access a JAX-RPC Web services endpoint, and vice versa.

The advantages of JAX-WS over JAX-RPC are compelling. JAX-WS:

?

Supports the SOAP 1.2 standard (in addition to SOAP 1.1).

?

Supports XML over HTTP. You can bypass SOAP if you wish. (See the

article

more information.)

?

Uses

the

Java

Architecture

for

XML

Binding

(JAXB)

for

its

data-mapping

model.

JAXB

has

complete

support

for

XML

schema

and

better

performance (more on that in a moment).

?

Introduces

a

dynamic

programming

model

for

both

server

and

client.

The

client

model

supports

both

a

message-oriented

and

an

asynchronous

approach.

?

Supports

Message

Transmission

Optimization

Mechanism

(MTOM),

a

W3C

recommendation

for

optimizing

the

transmission

and

format

of

a

SOAP

5