步骤:
1.pom.xml文件中添加插件:
<build>
<plugins>
<plugin>
<!-- generator自动生成代码的配置文件 -->
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.7</version>
<!-- 操作mysql的驱动包支持,即使pom.xml添加了jar包,以下也不能删 -->
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.13</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
2.src/main/resources目录下创建generatorConfig.xml:
注意:当前示例是生成scott数据库中emp表相关文件,记得修改数据库和表,以及账户、密码等
<?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>
<context id="mysqlTable" targetRuntime="MyBatis3">
<!-- 读取jdbc属性配置文件,则下面的数据库连接信息可以用占位符代替,如:userId="${jdbc.userId}"
<properties resource="jdbc.properties"></properties>
-->
<!-- 是否去掉生成类中的注释 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!-- 数据库连接信息 -->
<jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/scott?userUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai"
userId="root"
password="a">
<property name="nullCatalogMeansCurrent" value="true" />
</jdbcConnection>
<!-- 实体类的存放包路径 -->
<javaModelGenerator targetPackage="com.liu.demo5.bean" targetProject="src/main/java">
</javaModelGenerator>
<!-- xml映射文件的存放包路径 -->
<sqlMapGenerator targetPackage="com.liu.demo5.dao" targetProject="src/main/java">
</sqlMapGenerator>
<!-- mapper接口的存放包路径 -->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.liu.demo5.dao" targetProject="src/main/java">
</javaClientGenerator>
<!-- 指定表的生成策略,tableName:数据库中的表名,generatedKey:指定自动生成主键的属性,domainObjectName:生成的对应实体类的名字 -->
<table tableName="emp" domainObjectName="Emp">
<generatedKey column="empno" sqlStatement="mysql" identity="true" />
</table>
</context>
</generatorConfiguration>
3.执行,生成文件:
- eclipse:
- 右键项目-> Run As -> Maven build -> Goals栏输入Maven命令:mybatis-generator:generate -> 刷新项目
- idea(两种方式任选其一):
- Edit Configurations -> 点击左上角"+" -> 选择Maven -> Working directory选择当前项目路径 -> Command line输入:mybatis-generator:generate -> 确认并运行
- idea的Maven项目面板 -> 点开当前项目 -> 点开Plugins -> 直接双击插件(没有则刷新):mybatis-generator:generate