2 Star 10 Fork 10

ForFuture Code / mybatis源码学习

加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
克隆/下载
贡献代码
同步代码
取消
提示: 由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件
Loading...
README
Apache-2.0

mybatis

MyBatis SQL mapper框架使面向对象应用程序更容易地使用关系数据库。

MyBatis使用XML描述符或注释将对象与存储过程或SQL语句连接起来。

简单性是MyBatis数据映射器相对于对象关系映射工具的最大优势。

MyBatis简介

​ MyBatis源于Apache的一个开源项目iBatis。2002年,Clinton Begin开发了iBatis框架,并引入了SQL映射作为持久化层开发的一种方法,不久后Clinton Begin将iBatis捐献给Apache软件基金会。2010年,这个项目由Apache迁移到了Google Code,并改名为MyBatis。2013年11月,MyBatis迁移到目前最大的源代码托管平台Github。 ​ MyBatis是一款在持久层使用的SQL映射框架,可以将SQL语句单独写在XML配置文件中,或者使用带有注解的Mapper映射类来完成数据库记录到Java实体的映射。与另一款主流的ORM框架Hibernate不同,MyBatis属于半自动的ORM框架,它虽然不能将不同数据库的影响隔离开,仍然需要自己编写SQL语句,但是可以灵活地控制SQL语句的构造,将SQL语句的编写和程序的运行分离开,使用更加便捷。 ​ 目前,Java实现的持久化框架比较多,名气相对较大的有Hibernate、Speedment、Spring Data JPA、ActiveJPA等。总结一下,MyBatis能够流行起来的主要原因有以下几点:

  • (1)消除了大量的JDBC冗余代码,包括参数设置、结果集封装等。
  • (2)SQL语句可控制,方便查询优化,使用更加灵活。
  • (3)学习成本比较低,对于新用户能够快速学习使用。
  • (4)提供了与主流IoC框架Spring的集成支持。
  • (5)引入缓存机制,提供了与第三方缓存类库的集成支持。

https://github.com/mybatis/mybatis-3 https://github.com/mybatis/parent(依赖) 在这里插入图片描述

一 、下载mybatis源码

可以通过Release找到最新版本,直接下载源码Source Code到本地。 在这里插入图片描述 MyBatis工程有一个依赖包mybatis-parent,也需要下载到本地! 可以直接idea导入 也可以直接下载为zip包(推荐这种)。 在这里插入图片描述 通过查看mybatis的pom.xml文件,发现是一个聚合项目,依赖mybatis-parent

  <parent>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-parent</artifactId>
    <version>31</version>
    <relativePath />
  </parent>

二 、下载mybatis-parent源码

Mybatis源码依赖parent工程,版本:mybatis-parent-31.zip, 在这里插入图片描述

需要先编译parent工程再编译mybatis,具体如下

  • 先进入到parent项目目录下执行命令:
mvn clean install -Dmaven.test.skip
  • 再进入到mybatis-3项目目录下执行命令:
mvn clean install -Dmaven.test.skip

或者

选择mybatis-parent模块,install 在这里插入图片描述 然后选择mybatis模块,install。注意pom文件中,修改parent为相对路径 在这里插入图片描述 构建完成!下面便可以写代码,通过debug看源码了!

三、阅读MyBatis源码

添加自己包结构,com.gqzdev.mybati...... 在这里插入图片描述 通过上面的测试,证明我们搭的环境没问题,接下来便是一步步调试,阅读源码的过程

四、整合Spring-Mybatis模块

下载官方提供的案例,https://github.com/mybatis/spring 在这里插入图片描述

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types. "Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below). "Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof. "Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution." "Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work. 2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form. 3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed. 4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions: (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and (b) You must cause any modified files to carry prominent notices stating that You changed the files; and (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License. You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License. 5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions. 6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file. 7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License. 8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages. 9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright [yyyy] [name of copyright owner] Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

简介

mybatis源码学习 展开 收起
Apache-2.0
取消

发行版

暂无发行版

贡献者

全部

近期动态

加载更多
不能加载更多了
1
https://gitee.com/zhong96/mybatis-start.git
git@gitee.com:zhong96/mybatis-start.git
zhong96
mybatis-start
mybatis源码学习
master

搜索帮助