MyBatis学习4---使用MyBatis_Generator生成DtoDaoMapping

莫问天涯路几重，轻衫侧帽且从容。这篇文章主要讲述MyBatis学习4---使用MyBatis_Generator生成DtoDaoMapping相关的知识，希望能为你提供帮助。
由于MyBatis属于一种半自动的ORM框架，所以主要的工作将是书写Mapping映射文件，但是由于手写映射文件很容易出错，所以查资料发现有现成的工具可以自动生成底层模型类、Dao接口类甚至Mapping映射文件。
一、建立表结构
CREATE TABLE `user` (
`id` varchar(50) NOT NULL,
`username` varchar(18) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
`password` varchar(18) DEFAULT NULL,
`email` varchar(50) DEFAULT NULL,
`name` varchar(18) DEFAULT NULL,
`sex` varchar(2) DEFAULT NULL,
`birthday` varchar(50) DEFAULT NULL,
`address` varchar(500) DEFAULT NULL,
`tel` varchar(18) DEFAULT NULL,
`qq` varchar(18) DEFAULT NULL,
`image` varchar(50) DEFAULT NULL,
`sfjh` varchar(1) DEFAULT NULL,
`sfzx` varchar(1) DEFAULT NULL,
`sfhf` varchar(1) DEFAULT NULL,
`sfpl` varchar(1) DEFAULT NULL,
`sffx` varchar(1) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf-8;
二、下载mybatis-generator-core
进入：http://code.google.com/p/mybatis/
选择Downloads，再选择MyBatis Generator Tool下载即可。
三、生成配置文件
新建一个空的XML配置文件，名称可以随便取，这里以generatorConfig.xml为名。最好将这个文件放在下载后的lib目录中，如图：

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其中mysql的驱动可以随便放在非中文路径的地方，这里为了方便就放在lib目录下。
自动生成最重要的就是配置文件的书写，现在就开始介绍generatorConfig.xml这个文件的具体内容：

< ?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>
< !-- 数据库驱动-->
< classPathEntry location="mysql-connector-java-5.0.6-bin.jar"/>
< context id="DB2Tables" targetRuntime="MyBatis3">
< commentGenerator>
< property name="suppressDate" value="https://www.songbingjia.com/android/true"/>
< !-- 是否去除自动生成的注释 true：是： false:否 -->
< property name="suppressAllComments" value="https://www.songbingjia.com/android/true"/>
< /commentGenerator>
< !--数据库链接URL，用户名、密码 -->
< jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost/test" userId="test" password="test">
< /jdbcConnection>
< javaTypeResolver>
< property name="forceBigDecimals" value="https://www.songbingjia.com/android/false"/>
< /javaTypeResolver>
< !-- 生成模型的包名和位置-->
< javaModelGenerator targetPackage="test.model" targetProject="src">
< property name="enableSubPackages" value="https://www.songbingjia.com/android/true"/>
< property name="trimStrings" value="https://www.songbingjia.com/android/true"/>
< /javaModelGenerator>
< !-- 生成映射文件的包名和位置-->
< sqlMapGenerator targetPackage="test.mapping" targetProject="src">
< property name="enableSubPackages" value="https://www.songbingjia.com/android/true"/>
< /sqlMapGenerator>
< !-- 生成DAO的包名和位置-->
< javaClientGenerator type="XMLMAPPER" targetPackage="test.dao" targetProject="src">
< property name="enableSubPackages" value="https://www.songbingjia.com/android/true"/>
< /javaClientGenerator>
< !-- 要生成哪些表-->
< table tableName="about" domainObjectName="AboutDto" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> < /table>
< table tableName="user" domainObjectName="UserDto" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> < /table>
< table tableName="syslogs" domainObjectName="SyslogsDto" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> < /table>
< /context>
< /generatorConfiguration>

1、其中需要注意的有数据库驱动、数据库URL、用户名、密码、生成模型的包名和位置、生成映射文件的包名和位置、生成DAO的包名和位置以及最后需要生成的表名和对应的类名。

四、运行
需要通过CMD命令行方式来运行，首先可以先准备一个运行的脚本，这里使用的脚本是：java -jar mybatis-generator-core-1.3.2.jar -configfile generatorConfig.xml -overwrite
需要注意的是：mybatis-generator-core-1.3.2.jar为下载的对应版本的jar，generatorConfig.xml 为配置文件名，如果不为这个可以在这里进行修改。
启动cmd进入到“F:softmybatis-generator-core-1.3.2lib”这个目录下，如图：

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生成成功后进到src目录下，可以看到已经生成了对应的model、dao、mapping，如图：
【MyBatis学习4---使用MyBatis_Generator生成DtoDaoMapping】

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下面可以看看生成后的UserMapper.xml

< ?xml version="1.0" encoding="UTF-8" ?>
< !DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
< mapper namespace="test.dao.UserDtoMapper" >
< resultMap id="BaseResultMap" type="test.model.UserDto" >
< id column="id" property="id" jdbcType="VARCHAR" />
< result column="username" property="username" jdbcType="VARCHAR" />
< result column="password" property="password" jdbcType="VARCHAR" />
< result column="email" property="email" jdbcType="VARCHAR" />
< result column="name" property="name" jdbcType="VARCHAR" />
< result column="sex" property="sex" jdbcType="VARCHAR" />
< result column="birthday" property="birthday" jdbcType="VARCHAR" />
< result column="address" property="address" jdbcType="VARCHAR" />
< result column="tel" property="tel" jdbcType="VARCHAR" />
< result column="qq" property="qq" jdbcType="VARCHAR" />
< result column="image" property="image" jdbcType="VARCHAR" />
< result column="sfjh" property="sfjh" jdbcType="VARCHAR" />
< result column="sfzx" property="sfzx" jdbcType="VARCHAR" />
< result column="sfhf" property="sfhf" jdbcType="VARCHAR" />
< result column="sfpl" property="sfpl" jdbcType="VARCHAR" />
< result column="sffx" property="sffx" jdbcType="VARCHAR" />
< /resultMap>
< sql id="Base_Column_List" >
id, username, password, email, name, sex, birthday, address, tel, qq, image, sfjh,
sfzx, sfhf, sfpl, sffx
< /sql>
< select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" >
select
< include refid="Base_Column_List" />
from user
where id = #{id,jdbcType=VARCHAR}
< /select>
< delete id="deleteByPrimaryKey" parameterType="java.lang.String" >
delete from user
where id = #{id,jdbcType=VARCHAR}
< /delete>
< insert id="insert" parameterType="test.model.UserDto" >
insert into user (id, username, password,
email, name, sex, birthday,
address, tel, qq, image,
sfjh, sfzx, sfhf, sfpl,
sffx)
values (#{id,jdbcType=VARCHAR}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
#{email,jdbcType=VARCHAR}, #{name,jdbcType=VARCHAR}, #{sex,jdbcType=VARCHAR}, #{birthday,jdbcType=VARCHAR},
#{address,jdbcType=VARCHAR}, #{tel,jdbcType=VARCHAR}, #{qq,jdbcType=VARCHAR}, #{image,jdbcType=VARCHAR},
#{sfjh,jdbcType=VARCHAR}, #{sfzx,jdbcType=VARCHAR}, #{sfhf,jdbcType=VARCHAR}, #{sfpl,jdbcType=VARCHAR},
#{sffx,jdbcType=VARCHAR})
< /insert>
< insert id="insertSelective" parameterType="test.model.UserDto" >
insert into user
< trim prefix="(" suffix=")" suffixOverrides="," >
< if test="id != null" >
id,
< /if>
< if test="username != null" >
username,
< /if>
< if test="password != null" >
password,
< /if>
< if test="email != null" >
email,
< /if>
< if test="name != null" >
name,
< /if>
< if test="sex != null" >
sex,
< /if>
< if test="birthday != null" >
birthday,
< /if>
< if test="address != null" >
address,
< /if>
< if test="tel != null" >
tel,
< /if>
< if test="qq != null" >
qq,
< /if>
< if test="image != null" >
image,
< /if>
< if test="sfjh != null" >
sfjh,
< /if>
< if test="sfzx != null" >
sfzx,
< /if>
< if test="sfhf != null" >
sfhf,
< /if>
< if test="sfpl != null" >
sfpl,
< /if>
< if test="sffx != null" >
sffx,
< /if>
< /trim>
< trim prefix="values (" suffix=")" suffixOverrides="," >
< if test="id != null" >
#{id,jdbcType=VARCHAR},
< /if>
< if test="username != null" >
#{username,jdbcType=VARCHAR},
< /if>
< if test="password != null" >
#{password,jdbcType=VARCHAR},
< /if>
< if test="email != null" >
#{email,jdbcType=VARCHAR},
< /if>
< if test="name != null" >
#{name,jdbcType=VARCHAR},
< /if>
< if test="sex != null" >
#{sex,jdbcType=VARCHAR},
< /if>
< if test="birthday != null" >
#{birthday,jdbcType=VARCHAR},
< /if>
< if test="address != null" >
#{address,jdbcType=VARCHAR},
< /if>
< if test="tel != null" >
#{tel,jdbcType=VARCHAR},
< /if>
< if test="qq != null" >
#{qq,jdbcType=VARCHAR},
< /if>
< if test="image != null" >
#{image,jdbcType=VARCHAR},
< /if>
< if test="sfjh != null" >
#{sfjh,jdbcType=VARCHAR},
< /if>
< if test="sfzx != null" >
#{sfzx,jdbcType=VARCHAR},
< /if>
< if test="sfhf != null" >
#{sfhf,jdbcType=VARCHAR},
< /if>
< if test="sfpl != null" >
#{sfpl,jdbcType=VARCHAR},
< /if>
< if test="sffx != null" >
#{sffx,jdbcType=VARCHAR},
< /if>
< /trim>
< /insert>
< update id="updateByPrimaryKeySelective" parameterType="test.model.UserDto" >
update user
< set >
< if test="username != null" >
username = #{username,jdbcType=VARCHAR},
< /if>
< if test="password != null" >
password = #{password,jdbcType=VARCHAR},
< /if>
< if test="email != null" >
email = #{email,jdbcType=VARCHAR},
< /if>
< if test="name != null" >
name = #{name,jdbcType=VARCHAR},
< /if>
< if test="sex != null" >
sex = #{sex,jdbcType=VARCHAR},
< /if>
< if test="birthday != null" >
birthday = #{birthday,jdbcType=VARCHAR},
< /if>
< if test="address != null" >
address = #{address,jdbcType=VARCHAR},
< /if>
< if test="tel != null" >
tel = #{tel,jdbcType=VARCHAR},
< /if>
< if test="qq != null" >
qq = #{qq,jdbcType=VARCHAR},
< /if>
< if test="image != null" >
image = #{image,jdbcType=VARCHAR},
< /if>
< if test="sfjh != null" >
sfjh = #{sfjh,jdbcType=VARCHAR},
< /if>
< if test="sfzx != null" >
sfzx = #{sfzx,jdbcType=VARCHAR},
< /if>
< if test="sfhf != null" >
sfhf = #{sfhf,jdbcType=VARCHAR},
< /if>
< if test="sfpl != null" >
sfpl = #{sfpl,jdbcType=VARCHAR},
< /if>
< if test="sffx != null" >
sffx = #{sffx,jdbcType=VARCHAR},
< /if>
< /set>
where id = #{id,jdbcType=VARCHAR}
< /update>
< update id="updateByPrimaryKey" parameterType="test.model.UserDto" >
update user
set username = #{username,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR},
email = #{email,jdbcType=VARCHAR},
name = #{name,jdbcType=VARCHAR},
sex = #{sex,jdbcType=VARCHAR},
birthday = #{birthday,jdbcType=VARCHAR},
address = #{address,jdbcType=VARCHAR},
tel = #{tel,jdbcType=VARCHAR},
qq = #{qq,jdbcType=VARCHAR},
image = #{image,jdbcType=VARCHAR},
sfjh = #{sfjh,jdbcType=VARCHAR},
sfzx = #{sfzx,jdbcType=VARCHAR},
sfhf = #{sfhf,jdbcType=VARCHAR},
sfpl = #{sfpl,jdbcType=VARCHAR},
sffx = #{sffx,jdbcType=VARCHAR}
where id = #{id,jdbcType=VARCHAR}
< /update>
< /mapper>