How to build project by Spring Boot + Mybatis + Mybatis Generator? - spring-boot

Question

I follow mybatis official website to build my project step by step, but it always can not work well, so I hope you could give me a fully guide from beginning to the end, many thanks.

Answer 1

Step 1. Build a new spring boot project named booking.
This step is basically, I will skip it.
Step 2. Add mybatis-generator to project.
This could help us to generate entity and mapper class mybatis needed automatically, it's very useful for us to save our time.
Add plugin config in pom.xml
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.5</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>
</dependencies>
</plugin>
Create generatorConfig.xml at base resources path.
<?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="MySqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/booking?useSSL=false"
userId="root"
password="123456">
<property name="nullCatalogMeansCurrent" value="true" />
</jdbcConnection>
<javaModelGenerator targetPackage="com.clycle.booking.entity" targetProject="C:\Users\a243903\projects\booking\webapi\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<sqlMapGenerator targetPackage="com.clycle.booking.mapper" targetProject="C:\Users\a243903\projects\booking\webapi\src\main\resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<javaClientGenerator type="XMLMAPPER" targetPackage="com.clycle.booking.mapper" targetProject="C:\Users\a243903\projects\booking\webapi\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<table tableName="%">
</table>
</context>
</generatorConfiguration>
Create maven Run/Debug Configuration to run this plugin.
It will generate all entity, mapper class and mapper xml automatically. -Dmybatis.generator.overwrite=true, means it will overwrite existing entity or mapper class when run mybatis generator with maven.
Step 3. Add mybatis to this project.
Add mybatis dependency in pom.xml
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
Create mybatis-config.xml at base resources path.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="logImpl" value="LOG4J" />
</settings>
<typeAliases>
<package name="com.clycle.booking.entity" />
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC">
<property name="" value="" />
</transactionManager>
<dataSource type="UNPOOLED">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/booking" />
<property name="username" value="root" />
<property name="password" value="123456" />
</dataSource>
</environment>
</environments>
<mappers>
<package name="com.clycle.booking.mapper" />
<!--<mapper resource="com/clycle/booking/mapper/ShopMapper.xml" />-->
</mappers>
</configuration>
Add #MapperScan for application main class.
#SpringBootApplication
#MapperScan({"com.clycle.booking.mapper"})
public class BookingApplication {
public static void main(String[] args) {
SpringApplication.run(BookingApplication.class, args);
}
}
Autowired mapper interface to operate your database.
#Autowired
private ShopMapper shopMapper;
#PostMapping(RoutePath.SHOP_LIST)
public List<Shop> GetList() {
try {
return shopMapper.selectAll();
} catch (Exception ex) {
return null;
}
}

Answer 2

You can download this project: https://github.com/yyqian/spring-boot-mybatis-generator .
Everything just work fine on my computer.