Mabatis自动生成entity和mapper接口

http://openwares.net/java/mabatis_autogenerator.html

Mybatis Generator可以自动生成模型实体对象POJO,mapper接口和对应的xml配置文件。

Mybatis Generator提到的模型model其实就是实体entity。

Mybatis Generator的核心就一个jar包mybatis-generator-core-1.3.2.jar，可以从命令行运行，也有相应的eclipse插件。

配置文件

Mybatis Generator需要一个配置文件来生成代码，下面是配置文件的一个样例：

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<? xml version = "1.0" encoding = "UTF-8" ?> <! DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">   < generatorConfiguration >      < classPathEntry location = "/path/to/WebRoot/WEB-INF/lib/postgresql-9.2-1003.jdbc4.jar" />      < context id = "BuildingTables" targetRuntime = "MyBatis3" >            < commentGenerator >              < property name = "suppressAllComments" value = "true" />              < property name = "suppressDate" value = "true" />          </ commentGenerator >            < jdbcConnection driverClass = "org.postgresql.Driver"              connectionURL = "jdbc:postgresql://localhost/dbname"              userId = "xxx"              password = "xxx" >          </ jdbcConnection >            < javaTypeResolver >              < property name = "forceBigDecimals" value = "true" />          </ javaTypeResolver >            < javaModelGenerator targetPackage = "org.xxx.xxx.entity" targetProject = "project_name/src/main" >              < property name = "enableSubPackages" value = "false" />              < property name = "trimStrings" value = "true" />          </ javaModelGenerator >            < sqlMapGenerator targetPackage = "org.xxx.xxx.dao"  targetProject = "project_name/src/main" >              < property name = "enableSubPackages" value = "false" />          </ sqlMapGenerator >            < javaClientGenerator type = "XMLMAPPER" targetPackage = "org.xxx.xxx.dao"  targetProject = "project_name/src/main" >              < property name = "enableSubPackages" value = "false" />          </ javaClientGenerator >            < table schema = "base" tableName = "tb_building" domainObjectName = "Building" >              < property name = "useActualColumnNames" value = "true" />          </ table >          < table schema = "base" tableName = "tb_floor" domainObjectName = "Floor" >              < property name = "useActualColumnNames" value = "true" />          </ table >          < table schema = "base" tableName = "tb_house" domainObjectName = "House" >              < property name = "useActualColumnNames" value = "true" />          </ table >        </ context > </ generatorConfiguration >

配置文件的详细语法见官方文档。

运行Mybatis Generator

命令行

$ java -jar mybatis-generator-core-x.x.x.jar -configfile generatorConfig.xml

eclipse插件

在eclipse中配置新的安装源http://mybatis.googlecode.com/svn/sub-projects/generator/trunk/eclipse/UpdateSite/
然后安装即可。

可以通过file->new->Mybatis->Mybatis Generator Configuration File 新建配置文件
在配置文件上右击选择Generate Mybatis/iBatis Artifacts产生mapper接口和实体POJO