1、相关文档
官方文档:
http://www.mybatis.org/generator/
所在 github :
https://github.com/mybatis/generator
maven 依赖地址:
https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core
2、添加依赖 jar 包
在 maven 中 获取依赖,并添加到 pom.xml 文件中。
包依赖:
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
3、数据库设计
以我数据库为例
4、创建mgb.xml文件配置生成策略
<?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="DB2Tables" targetRuntime="MyBatis3">
<!--去掉注释-->
<commentGenerator>
<property name="suppressAllComments" value="true"></property>
</commentGenerator>
<!--配置数据库信息-->
<jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/mybatis?useSSL=false"
userId="root"
password="root">
</jdbcConnection>
<javaTypeResolver >
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!--指定java pojo 生成的位置-->
<javaModelGenerator targetPackage="com.ssm.pojo" targetProject="./src/main/java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--指定mapper文件生成位置-->
<sqlMapGenerator targetPackage="com.ssm.mapper" targetProject="./src/main/resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!--指定mapper接口位置-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.ssm.mapper" targetProject="./src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!--指定生成表的策略-->
<table tableName="tbl_emp" domainObjectName="Employee" ></table>
<table tableName="tbl_dept" domainObjectName="Department"></table>
</context>
</generatorConfiguration>
5、通过测试来创建相应的实体类以及mapper文件和接口
ublic class MBGTest {
@Test
public void test() throws InterruptedException, SQLException, IOException, XMLParserException, InvalidConfigurationException {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("mbg.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
}
}
6、自动创建的实体类、mapper.xml文件、mapper接口