springboot2.1整合mybatis-generator以及通用mapper
作者：互联网
1：添加依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.dev</groupId>
<artifactId>devloper-mine</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>devloper-mine</name>
<description>dev project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<!-- MyBatis Generator -->
<!-- Java接口和实体类 -->
<targetJavaProject>${basedir}/src/main/java</targetJavaProject>
<targetMapperPackage>com.dev.mapper.repositry</targetMapperPackage>
<targetModelPackage>com.dev.model</targetModelPackage>
<!-- XML生成路径 -->
<targetResourcesProject>${basedir}/src/main/resources</targetResourcesProject>
<targetXMLPackage>mapper</targetXMLPackage>
<!-- 通用mapper -->
<tk.mybatis.version>4.1.5</tk.mybatis.version>
<persistence.version>1.0.2</persistence.version>
<mapper.plugin>tk.mybatis.mapper.generator.MapperPlugin</mapper.plugin>
<mapper.Mapper>tk.mybatis.mapper.common.Mapper</mapper.Mapper>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/tk.mybatis/mapper-spring-boot-starter -->
<!-- 通用 mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>${tk.mybatis.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.persistence/persistence-api -->
<!-- @entity 注解 -->
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>${persistence.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.17</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
<!--mybatis-generator插件-->
<plugin>
<!--Mybatis-generator插件,用于自动生成Mapper和POJO-->
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.7</version>
<configuration>
<!--配置文件的位置 一定要改成配置文件的位置-->
<configurationFile>src/main/resources/mybatis-generator/generator-config.xml</configurationFile>
<!-- 覆盖 -->
<verbose>true</verbose>
<!-- 重写 -->
<overwrite>true</overwrite>
</configuration>
<dependencies>
<!-- https://mvnrepository.com/artifact/tk.mybatis/mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>${tk.mybatis.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
notice1：使用了 mybatis-generator+通用mapper 可以生成model、mapper、mapper.xml文件，但是若不加mybatis的依赖生成的文件会报错...
notice2：使用了mybatis就要配数据源否则会启动报错...
notice3：pom依赖中可以配置依赖版本号、mapper、model等的存放位置...
2：添加一个mybatis-generator需要用的db.properties文件（也可以不添加）
jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/dsos_zgq?&useUnicode=true&characterEncoding=utf-8 jdbc.username=root jdbc.password=root #插件位置 mapper.plugin=tk.mybatis.mapper.generator.MapperPlugin #生成的mapper类继承的父类的位置 mapper.Mapper=com.dev.mapper.BaseMapper
如图：
3：添加generator-config.xml（要和pom文件中配置的路径一致）
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<properties resource="mybatis-generator/db.properties"/>
<classPathEntry
location="D:\IntelljIdea\Maven3.5\localmaven\mysql\mysql-connector-java\8.0.16\mysql-connector-java-8.0.16.jar"/>
<!-- MyBatis3Simple 可以不生成生成model衍生的example文件 -->
<context id="DB2Tables" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<!-- TKmybatis配置 -->
<property name="javaFileEncoding" value="UTF-8"/>
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<plugin type="${mapper.plugin}">
<property name="mappers" value="${mapper.Mapper}"/>
</plugin>
<commentGenerator>
<property name="suppressDate" value="true"/>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}"
userId="${jdbc.username}"
password="${jdbc.password}">
<!-- mysql 驱动8.x版本需要设置时区 value设置为GMT、UTC都可以 -->
<property name="serverTimezone" value="GMT"/>
<!-- 解决生成其他数据库的表的model和mapper等 -->
<!-- 也可解决生成的model里面缺少@Id注解问题（此问题mysql驱动版本回退到5.1也可以解决）-->
<property name="nullCatalogMeansCurrent" value="true"/>
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<javaModelGenerator targetPackage="${targetModelPackage}" targetProject="${targetJavaProject}"/>
<sqlMapGenerator targetPackage="${targetXMLPackage}" targetProject="${targetResourcesProject}"/>
<javaClientGenerator targetPackage="${targetMapperPackage}" targetProject="${targetJavaProject}"
type="XMLMAPPER"/>
<!--tableName 代表表名 domainObjectName代表实体名 schema指数据库结构-->
<!-- 要保证表aopi存在哦~，使用%则可生成当前数据下所有表对应的model、mapper等文件 -->
<table tableName="aopi">
<generatedKey column="id" sqlStatement="Mysql" identity="true"/>
</table>
</context>
</generatorConfiguration>
4：编写一个通用mapper的接口BaseMapper
package com.dev.mapper;
import tk.mybatis.mapper.common.IdsMapper;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;
/**
* Created by zgq7 on 2019/6/24.
* 让生成的mapper文件都集成该接口
*/
public interface BaseMapper<T> extends Mapper<T>, MySqlMapper<T>, IdsMapper<T> {
}
notice1：类路径要与db.properties中定义的一样，不然会报错...
5：application.xml的配置
server.port=8022 server.servlet.context-path=/ #druid数据源 spring.datasource.type=com.alibaba.druid.pool.DruidDataSource spring.datasource.druid.url=jdbc:mysql://localhost:3306/dsos_zgq?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf-8 spring.datasource.druid.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.druid.username=root spring.datasource.druid.password=root #druid连接配置 spring.datasource.druid.db-type=mysql #druid测试 spring.datasource.druid.test-on-borrow=true #打印sql（两种都可以，但是我偏向后者了） #mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl logging.level.com.dev.mapper.repositry=debug
在此处我思索了一下druid的配置，我这里只是做简单配置而已，而且不止这一种配置方法，还有其他的配置方法，但是这种明显更方便更快捷。
后面我会更新druid的相关配置其他写法，多多研究一下。
6：运行mybatis-generator的插件，生成相关文件。
生成的文件结构如下：
7：进行单元测试看看是否能正常运行嘿嘿~~
notice1：可以看到sql日志也打出来了
notice2：单元测试也成功了，大功完成啦啦啦。。。。
总结：学习新的知识，了解新的用法，才能收获更多。
附mybatis官网地址关于xml配置的详情介绍：http://www.mybatis.org/generator/configreference/table.html
标签：mapper,springboot2.1,generator,spring,boot,druid,mybatis 来源： https://www.cnblogs.com/zgq7/p/11084161.html