之前写过通用Mapper的博客，但是没注意到它的官方网站说的很清楚了，这里仅作整理。
官方github网站： github.com/abel533/Map…
文档地址： github.com/abel533/Map…
查看文档与SpringBoot集成相关内容：
步骤：
1、加依赖
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>2.1.5</version>
</dependency>
加入这个依赖就不需要添加Mybatis的依赖了
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
2、配置
mapper:
mappers:
- tk.mybatis.mapper.common.Mapper #通用Mapper的存放位置
notEmpty: true
注意：4.0版本的Mapper不再mappers配置了。
只需做如下数据库连接配置,也无需配置实体类和*.xml的位置：
spring:
datasource:
url: jdbc:mysql://localhost:3306/user_center
hikari:
username: root
password: root
# >= 6.x: com.mysql.cj.jdbc.Driver
# <= 5.x: com.mysql.jdbc.Driver
driver-class-name: com.mysql.cj.jdbc.Driver
3、加注解
@tk.mybatis.spring.annotation.MapperScan(basePackages = "扫描包")
@SpringBootApplication
public class SampleMapperApplication implements CommandLineRunner {
}
注意：这里使用的 tk.mybatis.spring.annotation.MapperScan !`
4、代码生成器
这里使用专用代码生成器-maven插件方式生成代码。
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.6</version>
<configuration>
<configurationFile>
${basedir}/src/main/resources/generator/generatorConfig.xml
</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.29</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>4.0.0</version>
</dependency>
</dependencies>
</plugin>
</plugins>
注意，springboot内置了maven-complie-plugin
最后的pom文件如下：
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.7</version>
<configuration>
<configurationFile>
${basedir}/src/main/resources/generator/generatorConfig.xml
</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version> // 注意mysql驱动要与依赖的数据库连接mysql-connector版本一致
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>4.1.5</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
编写generatorConfig.xml
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<properties resource="config.properties"/> // 是从resource目录开始读，注意位置
<context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
<property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>
<property name="caseSensitive" value="true"/>
</plugin>
<jdbcConnection driverClass="${jdbc.driverClass}"
connectionURL="${jdbc.url}"
userId="${jdbc.user}"
password="${jdbc.password}">
</jdbcConnection>
<javaModelGenerator targetPackage="com.isea533.mybatis.model"
targetProject="src/main/java"/>
<sqlMapGenerator targetPackage="mapper"
targetProject="src/main/resources"/>
<javaClientGenerator targetPackage="com.isea533.mybatis.mapper"
targetProject="src/main/java"
type="XMLMAPPER"/>
<table tableName="user_info">
<generatedKey column="id" sqlStatement="JDBC"/>
</table>
</context>
</generatorConfiguration>
案例如下：
generatorConfig.xml文件：
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<properties resource="generator/config.properties"/>
<context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
<property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>
<property name="caseSensitive" value="true"/>
<property name="lombok" value="Getter,Setter,ToString"/>
</plugin>
<jdbcConnection driverClass="${jdbc.driverClass}"
connectionURL="${jdbc.url}"
userId="${jdbc.user}"
password="${jdbc.password}">
</jdbcConnection>
<!--实体-->
<javaModelGenerator targetPackage="com.itmuch.usercenter.domain.entity.${moduleName}"
targetProject="src/main/java"/>
<!--mapper.xml-->
<sqlMapGenerator targetPackage="com.itmuch.usercenter.dao.${moduleName}"
targetProject="src/main/resources"/>
<!--mapper接口-->
<javaClientGenerator targetPackage="com.itmuch.usercenter.dao.${moduleName}"
targetProject="src/main/java"
type="XMLMAPPER"/>
<!--为哪张表生成代码-->
<table tableName="${tableName}">
<generatedKey column="id" sqlStatement="JDBC"/>
</table>
</context>
</generatorConfiguration>
config.properties文件：
jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/user_center?nullCatalogMeansCurrent=true
//解决user表与mysql数据库默认user表重名造成的生成问题
jdbc.user=root
jdbc.password=root
moduleName=bonus
tableName=bonus_event_log
使用：
