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结合了JPA和Mybatis各自优势的DAO插件,解决JPA和Mybatis同时使用时的一些扩展性和兼容性问题。

License: Artistic License 2.0

Java 100.00%

genericdao's Introduction

genericdao - 结合了JPA和Mybatis各自优势的DAO插件

利用JPA单表快速开发的优势和Mybatis构造SQL的灵活性,解决JPA和mybatis同时使用时的一些扩展性和兼容性问题。

###功能简介

  • JPA接口和Mybatis接口使用同一个DAO接口,其中Mybatis的接口方法使用注解单独标注。
  • DAO接口代理使用spring-data-jpa的实现机制,对spring-date-jpa中DAO接口方法的查找机制进行了扩展。对于接口中的mybatis方法,调用mybatis的Mapper代理实现。
  • 扩展Mybatis查询结果和实体属性的映射方式。查询结果首先与带有JPA @Column注解的类属性进行匹配,然后再使用Mybatis自带映射方式。
  • 实现的功能不对spring-data-jpa和Mybatis的源码做任何修改,只对它们的实现机制进行扩展,避免重复造轮子。

###Quick start JPA配置

@EnableJpaRepositories(basePackages={"basePackages"} ,
	repositoryFactoryBeanClass=GenericJpaRepositoryFactoryBean.class) 

使用javaConfig配置方法,其中GenericJpaRepositoryFactoryBean是为扩展后的JpaRepositoryFactory,其中定义了扩展后的JPA底层DAO接口及接口方法的查找方式。

Mybatis配置

//创建Configuration对象
Configuration configuration = new Configuration() ;
//替换Configuration中默认的ObjectWrapperFactory
configuration.setObjectWrapperFactory(new JPAObjectWrapperFactory()) ;
//替换sqlSessionFactoryBean中默认的Configuration对象
sqlSessionFactoryBean.setConfiguration(configuration);

在ObjectWrapperFactory能够指定ObjectWrapper,ObjectWrapper是Mybatis提供的一种java对象反射类,通过ObjectWrapper能够获取和设置object对象的属性。

参考开源项目
spring-data-jpa-extra
MyBatis通用Mapper3

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