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】
文章图片
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>
接下来就可以将这三个目录拷贝到对应项目的目录中,如果需要新增自己的方法可以修改dao类。
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