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：

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