mybatis_自动生成工具

客官°小女子只卖身不卖艺 2022-05-25 11:48 382阅读 0赞

1. 下载mybatis-generator-core工具包：

mybatis-generator-core.1.3.1下载路径：[http://www.cnd8.com/downinfo/8521.html][http_www.cnd8.com_downinfo_8521.html]

解压后目录如下：

![20180514151847597][]

mybatis-generator-core最新版本为1.3.5，下载路径：

[https://github.com/mybatis/generator/releases][https_github.com_mybatis_generator_releases]

解压后目录如下：

![20180514151854444][]

2. 加包

如1.3.5，lib目录内容如下：

![20180514151913624][]

添加mysql-connector-java-5.1.38.jar

3. 创建xml文件

在lib目录下创建generatorConfig.xml

<?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">

<classPathEntry    location=*"mysql-connector-java-5.1.38.jar"*/>

<context id=*"DB2Tables"*    targetRuntime=*"MyBatis3"*>

<property name=*"suppressDate"* value=*"true"*/>

<property name=*"suppressAllComments"* value=*"true"*/>

</commentGenerator>

<jdbcConnection driverClass=*"com.mysql.jdbc.Driver"* connectionURL=*"jdbc:mysql://localhost/test"* userId=*"root"* password=*"123qwe"*>

</jdbcConnection>

<property name=*"forceBigDecimals"* value=*"false"*/>

</javaTypeResolver>

<javaModelGenerator targetPackage=*"lcw.model"* targetProject=*"src"*>

<property name=*"enableSubPackages"* value=*"true"*/>

<property name=*"trimStrings"* value=*"true"*/>

</javaModelGenerator>

<sqlMapGenerator targetPackage=*"lcw.mapping"* targetProject=*"src"*>

<property name=*"enableSubPackages"* value=*"true"*/>

</sqlMapGenerator>

<javaClientGenerator type=*"XMLMAPPER"* targetPackage=*"lcw.dao"* targetProject=*"src"*>

<property name=*"enableSubPackages"* value=*"true"*/>

</javaClientGenerator>

<table tableName=*"t\_person"* domainObjectName=*"Person"* enableCountByExample=*"false"* enableUpdateByExample=*"false"* enableDeleteByExample=*"false"* enableSelectByExample=*"false"* selectByExampleQueryId=*"false"*></table>

</context>

</generatorConfiguration>

其中需要修改的都已标记，targetProject为生成的文件路径，tableName为表名，domainObjectName为实体类名

4. 执行命令

Cmd定位到lib目录：

执行命令：java -jar mybatis-generator-core-1.3.5.jar -configfile generatorConfig.xml -overwrite

![20180514151936781][]

此时在src目录下生成了lcw目录，其下有三个目录：

![20180514151954985][]

5. 查看结果：

1.model：

**package** lcw.model;

**import** java.math.BigDecimal;

**public** **class** Person \{

**private** Integer id;

**private** String name;

**private** String password;

**private** BigDecimal account;

**public** Integer getId() \{

**return** id;

**public** **void** setId(Integer id) \{

**this**.id = id;

**public** String getName() \{

**return** name;

**public** **void** setName(String name) \{

**this**.name = name == **null** ? **null** : name.trim();

**public** String getPassword() \{

**return** password;

**public** **void** setPassword(String password) \{

**this**.password = password == **null** ? **null** : password.trim();

**public** BigDecimal getAccount() \{

**return** account;

**public** **void** setAccount(BigDecimal account) \{

**this**.account = account;

2.接口文件

**package** lcw.dao;

**import** lcw.model.Person;

**public** **interface** PersonMapper \{

**int** deleteByPrimaryKey(Integer id);

**int** insert(Person record);

**int** insertSelective(Person record);

Person selectByPrimaryKey(Integer id);

**int** updateByPrimaryKeySelective(Person record);

**int** updateByPrimaryKey(Person record);

2.映射文件

<?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=*"lcw.dao.PersonMapper"*>

<resultMap id=*"BaseResultMap"* type=*"lcw.model.Person"*>

<id column=*"id"* jdbcType=*"INTEGER"* property=*"id"* />

<result column=*"name"* jdbcType=*"VARCHAR"* property=*"name"* />

<result column=*"password"* jdbcType=*"VARCHAR"* property=*"password"* />

<result column=*"account"* jdbcType=*"DECIMAL"* property=*"account"* />

</resultMap>

<sql id=*"Base\_Column\_List"*>

id, name, password, account

</sql>

<select id=*"selectByPrimaryKey"* parameterType=*"java.lang.Integer"* resultMap=*"BaseResultMap"*>

select

<include refid=*"Base\_Column\_List"* />

from t\_person

where id = \#\{id,jdbcType=INTEGER\}

</select>

<delete id=*"deleteByPrimaryKey"* parameterType=*"java.lang.Integer"*>

delete from t\_person

where id = \#\{id,jdbcType=INTEGER\}

</delete>

<insert id=*"insert"* parameterType=*"lcw.model.Person"*>

insert into t\_person (id, name, password,

account)

values (\#\{id,jdbcType=INTEGER\}, \#\{name,jdbcType=VARCHAR\}, \#\{password,jdbcType=VARCHAR\},

\#\{account,jdbcType=DECIMAL\})

</insert>

<insert id=*"insertSelective"* parameterType=*"lcw.model.Person"*>

insert into t\_person

<trim prefix=*"("* suffix=*")"* suffixOverrides=*","*>

<if test=*"id != null"*>

id,

</if>

<if test=*"name != null"*>

name,

</if>

<if test=*"password != null"*>

password,

</if>

<if test=*"account != null"*>

account,

</if>

</trim>

<trim prefix=*"values ("* suffix=*")"* suffixOverrides=*","*>

<if test=*"id != null"*>

\#\{id,jdbcType=INTEGER\},

</if>

<if test=*"name != null"*>

\#\{name,jdbcType=VARCHAR\},

</if>

<if test=*"password != null"*>

\#\{password,jdbcType=VARCHAR\},

</if>

<if test=*"account != null"*>

\#\{account,jdbcType=DECIMAL\},

</if>

</trim>

</insert>

<update id=*"updateByPrimaryKeySelective"* parameterType=*"lcw.model.Person"*>

update t\_person

<set>

<if test=*"name != null"*>

name = \#\{name,jdbcType=VARCHAR\},

</if>

<if test=*"password != null"*>

password = \#\{password,jdbcType=VARCHAR\},

</if>

<if test=*"account != null"*>

account = \#\{account,jdbcType=DECIMAL\},

</if>

</set>

where id = \#\{id,jdbcType=INTEGER\}

</update>

<update id=*"updateByPrimaryKey"* parameterType=*"lcw.model.Person"*>

update t\_person

set name = \#\{name,jdbcType=VARCHAR\},

password = \#\{password,jdbcType=VARCHAR\},

account = \#\{account,jdbcType=DECIMAL\}

where id = \#\{id,jdbcType=INTEGER\}

</update>

</mapper>

[http_www.cnd8.com_downinfo_8521.html]: http://www.cnd8.com/downinfo/8521.html
[20180514151847597]: /images/20220525/f6b3e7eaec85460e800ba41699543097.png
[https_github.com_mybatis_generator_releases]: https://github.com/mybatis/generator/releases
[20180514151854444]: /images/20220525/ff6eb4bd481e4fb8ba937298e942dbe6.png
[20180514151913624]: /images/20220525/7b2250c4364b448589e0b986a598c153.png
[20180514151936781]: /images/20220525/103bcfb56cbc48ac8fae44afff8284e2.png
[20180514151954985]: /images/20220525/4b1c5e9b77174da298b463894da7fcdc.png