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基于jxta的校园网资源共享系统的设计与实现.doc
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基于jxta的校园网资源共享系统的设计与实现.doc
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摘要
摘要
伴随高等教育的迅速发展和信息技术革命到来,高等院校面临着办学规模扩
大、资源信息化等挑战,有效地资源共享是解决问题的重要途径。另一方面,高
校校园网已经成为高校校园中重要的基础设施。基于校园网的资源共享系统,采
用先进的网络技术,提供资源共享平台,促进了教学方法的变革,提高学生培养
质量以及丰富师生交流方式意义重大。
而当前学校现有的一些系统之间基本上没有任何的功能接口和数据共享,资
源异构,缺乏统一规划,共享程度低,不能很好地满足师生学习、生活和交流的
问题。其次,资源种类繁多、资源类型和存在形式各不相同,呈现较强的异构特
性,实现共享较困难,资源共享程度低。同时,校园用户分布密集,传统的分布
式控制模式,效率较低,通信负载较高,安全性较低,不适合高等院校的环境,
基于校园网的资源共享系统十分必要。
本文针对上述资源缺乏统一规划,共享程度低,共享结构不合理等需求,依
托校园网实现 Web 形式资源共享系统,能够实现对异构资源管理,同时在集中分
布式模式下,按照资源访问权限控制技术约束,完成师生之间的多元互动模式。
利用元数据管理技术,整合资源的类型、属性等,进行资源的标签化和统一化管
理,梳理相关管理流程和权限规则,以角色的访问权限控制为基础,实现系统资
源的权限控制访问。引入 JXTA 技术和 P2P 技术,以 Java 为编程语言,基于 Eclipse
和 Mysql 开发平台,设计并实现资源共享系统。
最后,结合校园资源共享系统的需求,运用相关工具进行测试,结果表明,
本文实现的系统的正确、有效,具有较高的可行性,实现了用户需求分析和系统
设计的功能。
关键词:校园资源共享,异构资源管理,集中分布式模式,访问权限控制,多元
互动模式
I
ABSTRACT
ABSTRACT
With the rapid development of higher education and the revolution of information
technology, colleges are confronted with more and more changes such as the expansion
of school size, and the informatization of resource, ect. On the other hand, campus
network has become an important infrastructure in campus. The resource sharing system
based on campus network, which make use of the technology of advanced network,
provides a platform for resource sharing and promotes the transformation of teaching
methods. What’s more, it is also significant in enriching the communication method
between teachers and students.
Currently, there are some existing resource sharing systems in colleges, which are
the problem of single or overlapping function.. On the other hand, it’s difficult to share
the resource because of the variety of resource species and data attributes. What’s more,
As the densely distributed of campus users, the traditional mode of distributed control
has a lot of problem such as the low efficiency, the higher traffic load and the low
security, which make it not suitable for institutions of higher learning environment. In
summary, the resource sharing system based on campus network is very necessary.
This paper focus on the need of resource unified planning, sharing structure and
degree, achieved a web resource sharing system on campus network, which enabled
management of heterogeneous resources, and shared in accordance with the constraints
of resource access control technology. We achieved the unified management of
resources by metadata management technology, and controlled the access of system by
multi-level administrator audit policy based on the rules of access control role. This
paper made use of JXTA technology and P2P technology for the searching, In addition,
the system was programmed with Java and based on the platform of Eclipse and Mysql.
Finally, this paper used the relevant tools for testing, which combined the
requirements of campus resource sharing system. The result shows the system achieved
in this paper is correct, effective and feasible, and the function designed in User
requirements analysis and system design were achieved.
Keywords:Campus Network Resource Share, Heterogeneous Resources Management,
Centralized-distributed Model , Control Access,The Pluralistic Interaction Model
II
目录
目录
第一章 绪论 .................................................................................................................... 1
1.1 研究的背景及意义 ........................................................................................... 1
1.2 国内外研究现状 ............................................................................................... 2
1.3 本文的主要研究内容 ....................................................................................... 4
1.4 论文的组织结构 ............................................................................................... 5
第二章 校园资源共享系统关键技术 ............................................................................ 7
2.1 元数据管理技术 ............................................................................................... 7
2.1.1 元数据介绍 ............................................................................................ 7
2.1.2 教育资源元数据 .................................................................................... 8
2.1.3 元数据与 XML 结合 ............................................................................. 9
2.1.4 元数据库 .............................................................................................. 10
2.2 集中式与分布式模式 ......................................................................................11
2.2.1 集中式控制模式 ...................................................................................11
2.2.2 分布式控制模式 .................................................................................. 12
2.2.3 集中分布式控制模式 .......................................................................... 13
2.2.4 面向校园网的信息资源共享模式 ...................................................... 13
2.3 系统主要开发技术 ......................................................................................... 14
2.3.1 JXTA 平台技术..................................................................................... 14
2.3.2 对等网(P2P)技术............................................................................ 15
2.3.3 Java Server Pages(JSP)技术 ............................................................ 16
2.4 本章小结 ......................................................................................................... 18
第三章 校园资源共享系统需求分析和概要设计 ...................................................... 19
3.1 系统需求分析 ................................................................................................. 19
3.1.1 用户分析 .............................................................................................. 19
3.1.2 业务需求分析 ...................................................................................... 21
3.1.3 功能需求分析 ...................................................................................... 24
3.2 校园网资源共享系统概要设计 ..................................................................... 26
3.2.1 系统管理平台 ...................................................................................... 27
3.2.2 资源管理平台 ...................................................................................... 29
3.2.3 资源共享平台 ...................................................................................... 30
III
目录
3.2.4 资源搜索平台 ...................................................................................... 31
3.2.5 资源评价和统计平台 .......................................................................... 33
3.2.6 交流平台 .............................................................................................. 33
3.3 系统数据库设计 ............................................................................................. 33
3.3.1 实体 E-R 图.......................................................................................... 35
3.3.2 关系模式设计 ...................................................................................... 37
3.3.3 数据表详细字段 .................................................................................. 38
3.4 本章小结 ......................................................................................................... 39
第四章 校园资源共享系统的详细设计与实现 .......................................................... 41
4.1 资源发布 ......................................................................................................... 41
4.1.1 元数据管理 .......................................................................................... 41
4.1.2 资源审核 .............................................................................................. 43
4.1.3 资源权限控制 ...................................................................................... 44
4.1.4 资源编辑 .............................................................................................. 44
4.2 资源统计检索平台 ......................................................................................... 46
4.2.1 本地搜索 .............................................................................................. 46
4.2.2 在线搜索 .............................................................................................. 48
4.2.3 高级搜索 .............................................................................................. 49
4.2.4 资源排序 .............................................................................................. 50
4.3 资源共享平台 ................................................................................................. 50
4.3.1 资源浏览 .............................................................................................. 51
4.3.2 资源下载 .............................................................................................. 51
4.3.3 资源文辑 .............................................................................................. 53
4.4 在线交流平台 ................................................................................................. 55
4.4.1 在线交流 .............................................................................................. 55
4.4.2 留言板 .................................................................................................. 56
4.5 本章小结 ......................................................................................................... 57
第五章 校园资源共享系统测试 .................................................................................. 58
5.1 系统的测试方法与环境 ................................................................................. 58
5.2 系统测试与分析 ............................................................................................. 58
5.2.1 用户登录功能测试 .............................................................................. 58
5.2.2 资源发布功能测试 .............................................................................. 59
5.2.3 资源检索功能测试 .............................................................................. 60
IV
目录
5.2.4 资源共享功能测试 .............................................................................. 61
5.2.5 系统管理功能测试 .............................................................................. 62
5.3 本章小结 ......................................................................................................... 62
第六章 总结与展望 ...................................................................................................... 63
6.1 本文总结 ......................................................................................................... 63
6.2 论文展望 ......................................................................................................... 64
致谢 ................................................................................................................................ 65
参考文献 ........................................................................................................................ 66
V
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