SpringBoot整合tkMapper
项目使用SpringBoot2.0，H2数据库，使用了 Lombok 简化代码；本人是刚入门的菜鸟，下面是本人使用SpringBoot整合tkMapper的一个小demo，记录下来本人在此处踩得坑，有需要修正的地方欢迎各路大神、大佬指导，小弟谦虚受教。
1 搭建一个SpringBoot的项目，怎么搭建网上教程一大堆，这里就不描述了直接进入正题，首先先看一下整体的项目结构
2 pom文件引入依赖（注意依赖冲突）
<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>
<!--lombok省略代码-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- h2嵌入式数据-->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<!-- tk-->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>RELEASE</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>3.4.5</version>
</dependency>
</dependencies>3 在resources目录下新建db文件夹，用来存放数据文件，其中schema-h2.sql为数据库 Schema 脚本，data-h2.sql为Data脚本
schema-h2.sql
DROP TABLE IF EXISTS user;
CREATE TABLE user
(
id BIGINT(20) NOT NULL COMMENT '主键ID',
name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
age INT(11) NULL DEFAULT NULL COMMENT '年龄',
email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
PRIMARY KEY (id)
);data-h2.sql
DELETE FROM user;
INSERT INTO user (id, name, age, email) VALUES
(1, 'red', 18, 'test1@tian.com'),
(2, 'yll', 20, 'test2@tian.com'),
(3, 'putty', 22, 'test3@tian.com'),
(4, 'ele', 24, 'test4@tian.com'),
(5, 'tom', 26, 'test5@tian.com');4 application.yml
spring:
datasource:
driver-class-name: org.h2.Driver
schema: classpath:db/schema-h2.sql
data: classpath:db/data-h2.sql
url: jdbc:h2:mem:root
username: root
password: root5 在生成的项目路径下新建一个 tk 包，在 tk 包下新建bean包（存放实体类），dao 包（存放 Mapper 接口类），config 包（存放配置类）
tk 包下新建通用 Mapper 接口 MyMapper
继承Mapper和MySqlMapper，以后我们的业务dao直接集成MyMapper即可
此接口不能被扫描到，否则会报错
MyMapper.java
package com.tian.tkmapper;
import org.springframework.stereotype.Repository;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;
@Repository
public interface MyMapper<T> extends Mapper<T> ,MySqlMapper<T> {
}bean包下新建User类，此处使用了Lombok省略代码，@Data注解包含get/set等方法
User.java
package com.tian.tkmapper.tk.bean;
import lombok.Data;
@Data
public class User {
private Long id;
private String name;
private Integer age;
private String email;
}dao包下新建业务接口UserDao
UserDao.java
package com.tian.tkmapper.tk.dao;
import com.tian.tkmapper.MyMapper;
import com.tian.tkmapper.tk.bean.User;
import org.springframework.stereotype.Repository;
@Repository
public interface UserDao extends MyMapper<User> {
}config包下新建配置类MybatisConfigurer
MybatisConfigurer.java
package com.tian.tkmapper.tk.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import tk.mybatis.spring.mapper.MapperScannerConfigurer;
import javax.annotation.Resource;
import javax.sql.DataSource;
import java.util.Properties;
@Configuration
public class MybatisConfigurer {
@Resource
private DataSource dataSource;
@Bean
public SqlSessionFactory sqlSessionFactoryBean() throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
bean.setTypeAliasesPackage("com.tian.tkmapper.tk.bean");
//添加XML目录
// ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
// bean.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
return bean.getObject();
}
@Configuration
@AutoConfigureAfter(MybatisConfigurer.class)
public static class MyBatisMapperScannerConfigurer {
@Bean
public MapperScannerConfigurer mapperScannerConfigurer() {
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
mapperScannerConfigurer.setBasePackage("com.tian.tkmapper.tk.dao.*");
//配置通用mappers
Properties properties = new Properties();
properties.setProperty("mappers", "com.tian.tkmapper.MyMapper");
properties.setProperty("notEmpty", "false");
properties.setProperty("IDENTITY", "MYSQL");
mapperScannerConfigurer.setProperties(properties);
return mapperScannerConfigurer;
}
}
}6 在启动类添加@MapperScan
package com.tian.tkmapper;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import tk.mybatis.spring.annotation.MapperScan;
@SpringBootApplication
@MapperScan(basePackages = "com.tian.tkmapper.tk.dao")//mapper接口的路径
public class TkmapperApplication {
public static void main(String[] args) {
SpringApplication.run(TkmapperApplication.class, args);
}
}7 测试代码进行测试
package com.tian.tkmapper;
import com.tian.tkmapper.tk.bean.User;
import com.tian.tkmapper.tk.dao.UserDao;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
@RunWith(SpringRunner.class)
@SpringBootTest
public class TkmapperApplicationTests {
@Autowired
private UserDao userDao;
@Test
public void testSelect() {
System.out.println(("----- selectAll method test ------"));
List<User> userList = userDao.selectAll();
Assert.assertEquals(5, userList.size());
userList.forEach(System.out::println);
}
}最后看到显示输出为如下即成功
8 说一下本人遇到的小坑，划重点了划重点了划重点了，重要的事情说三遍！！！
a> MyMapper不能被扫描到，解决方案很多，不让启动类启动时扫描到就可以
b> 启动类中@MapperScan要引tk包下面的 import tk.mybatis.spring.annotation.MapperScan;
c>pom文件依赖冲突，由于本人也是刚入门菜鸟一个，也不是很清楚哪个与哪个冲突，这个有待读者验证，如果有了解的大神可以评论指导，多谢
以上就上本人整合通用Mappe时遇见的几个小坑，如有错误多多谅解，欢迎来指导到此这篇关于SpringBoot整合tkMapper的方法的文章就介绍到这了,更多相关SpringBoot整合tkMapper内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！
