mybatis-generator 1.3.5 学习笔记

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/undergrowth/article/details/78359566

mybatis-generator 1.3.5 学习笔记

概述

• 参考
  
  • http://www.jianshu.com/p/1b826d43dbaf
  • https://github.com/mybatis/generator
  • http://www.cnblogs.com/cb0327/p/5158178.html
  • https://github.com/abel533/Mybatis-Spring/
  • http://blog.csdn.net/hj7jay/article/details/50911968

mybatis-generator-config_1_0.dtd—->生成器配置文件(理解此文件对于理解源码很有帮助)

• (properties?, classPathEntry*, context+)—->顶层需要至少一个content/0个或者多个classPathEntry/0个或者一个properties

context—->上下文元素

• (property*, plugin*, commentGenerator?, (connectionFactory | jdbcConnection), javaTypeResolver?,
  javaModelGenerator, sqlMapGenerator?, javaClientGenerator?, table+)
• 至少一个connectionFactory或者jdbcConnection,一个javaModelGenerator,一个或者多个table
• 需要0个或者多个property/plugin
• 0个或者一个commentGenerator/sqlMapGenerator/javaClientGenerator/javaTypeResolver

MyBatisGenerator—->生成器入口

• org.mybatis.generator.api.MyBatisGenerator#generate
  
  • context.generateFiles—->产生generatedJavaFiles/generatedXmlFiles列表
    
    • 对于所有配置的introspectedTables,遍历introspectedTables,
    • 先利用IntrospectedTableMyBatis3Impl#calculateGenerators添加一系列的默认client/model/xml的生成器,产生一系列的model/example/xml/java文件
    • 再利用pluginAggregator进行如下操作
      
      • PluginAggregator#contextGenerateAdditionalJavaFiles(org.mybatis.generator.api.IntrospectedTable)—->PluginAggregator利用配置的plugin集合产生java文件
      • PluginAggregator#contextGenerateAdditionalXmlFiles(org.mybatis.generator.api.IntrospectedTable)—->PluginAggregator利用配置的plugin集合产生xml文件
  • writeGeneratedXmlFile—->写xml到磁盘
  • writeGeneratedJavaFile—->写java文件到磁盘

AbstractGenerator—->产生器父类

• ExampleGenerator—->AbstractJavaGenerator—->AbstractGenerator
• SimpleJavaClientGenerator—->AbstractJavaClientGenerator—->AbstractJavaGenerator—->AbstractGenerator
• SimpleXMLMapperGenerator—->AbstractXmlGenerator—->AbstractGenerator
  
  • AbstractGenerator—->提供拥有context/introspectedTable/warnings/progressCallback机制
  • AbstractJavaGenerator—->提供拥有getCompilationUnits/getGetter/addDefaultConstructor/getRootClass机制
  • SimpleJavaClientGenerator—->添加getCompilationUnits实现，产生GeneratedJavaFile文件
  • SimpleXMLMapperGenerator—->添加默认方法映射,产生XmlElement文件

ConfigurationParser—->Configuration—->所有配置项对应类

• org.mybatis.generator.config.xml.ConfigurationParser#parseConfiguration(org.xml.sax.InputSource)

PropertyHolder—->属性拥有者,下面关联很多配置子类

• TableConfiguration/JavaModelGeneratorConfiguration/Context—->PropertyHolder
• SqlMapGeneratorConfiguration/JDBCConnectionConfiguration—->PropertyHolder
• TypedPropertyHolder—->PropertyHolder
  
  • JavaClientGeneratorConfiguration/PluginConfiguration/JavaTypeResolverConfiguration—->TypedPropertyHolder—->PropertyHolder
  • CommentGeneratorConfiguration/ConnectionFactoryConfiguration—->TypedPropertyHolder—->PropertyHolder

PluginAdapter—->Plugin—->扩展的插件机制

• 遍历introspectedTables,PluginAggregator利用配置的plugin集合产生java文件/xml文件
• 理解其内涵,了解mybatis-generator-config_1_0.dtd/SimpleJavaClientGenerator/SimpleXMLMapperGenerator机制即可很好的进行扩展

测试