Spring Boot2.0之整合Mybatis详解编程语言

我在写这个教程时候，踩了个坑，一下子折腾到了凌晨两点半。

坑： Spring Boot对于Mysql8.1的驱动支持不好啊

我本地安装的是Mysql8.1版本，在开发时候。pom提示不需要输入驱动版本（因为Spring Boot会自动匹配），毛啊。根本就没有匹配成功。然后我尝试了各种办法。没有解决。

最后安装的mysql5.6版本轻松搞定

废话不多说了，赶紧写完，睡觉觉。

1、创建maven工程，pom：

<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> 
<groupId>jdbcTemplate</groupId> 
<artifactId>com.toov5.jdbc</artifactId> 
<version>0.0.1-SNAPSHOT</version> 
<parent> 
<groupId>org.springframework.boot</groupId> 
<artifactId>spring-boot-starter-parent</artifactId> 
<version>1.3.2.RELEASE</version> 
<relativePath /> <!-- lookup parent from repository --> 
</parent> 
<dependencies> 
<dependency> 
<groupId>org.springframework.boot</groupId> 
<artifactId>spring-boot-starter</artifactId> 
</dependency> 
<dependency> 
<groupId>org.springframework.boot</groupId> 
<artifactId>spring-boot-starter-test</artifactId> 
<scope>test</scope> 
</dependency> 
<dependency> 
<groupId>org.mybatis.spring.boot</groupId> 
<artifactId>mybatis-spring-boot-starter</artifactId> 
<version>1.1.1</version> 
</dependency> 
<dependency> 
<groupId>mysql</groupId> 
<artifactId>mysql-connector-java</artifactId> 
</dependency> 
<dependency> 
<groupId>org.springframework.boot</groupId> 
<artifactId>spring-boot-starter-web</artifactId> 
</dependency> 
<dependency> 
<groupId>org.projectlombok</groupId> 
<artifactId>lombok</artifactId> 
<version>1.16.20</version> 
<scope>provided</scope> 
</dependency> 
</dependencies> 
</project>

2、application.properties:

spring.datasource.url=jdbc:mysql://localhost:3306/test 
spring.datasource.username=root 
spring.datasource.password=root 
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

3、User类代码：

package com.toov5.entity; 
import lombok.Data; 
@Data   
public class User { 
private Integer age; 
private String name; 
private  Integer id; 
}

用了lombok插件

4、Mapper代码：

package com.toov5.mapper; 
import org.apache.ibatis.annotations.Insert; 
import org.apache.ibatis.annotations.Param; 
import org.apache.ibatis.annotations.Select; 
import com.toov5.entity.User; 
public interface UserMapper { 
@Select("SELECT * FROM USERS WHERE NAME = #{name}") 
User findByName(@Param("name") String name); 
@Insert("INSERT INTO USERS(NAME, AGE) VALUES(#{name}, #{age})") 
int insert(@Param("name") String name, @Param("age") Integer age); 
}

这里没有用到 @Mapper注解哦因为启动类里面有个好东西代替了！请接着往下读

5、service代码

package com.toov5.service; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Service; 
import com.toov5.mapper.UserMapper; 
import lombok.extern.slf4j.Slf4j; 
@Service 
@Slf4j 
public class UserService { 
@Autowired 
private UserMapper userMapper; 
public int insertUser(String name, Integer age){ 
int result = userMapper.insert(name, age); 
log.info("####################",result); 
return result; 
} 
}

6、Controller代码：

package com.toov5.controller; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RestController; 
import com.toov5.service.UserService; 
@RestController 
public class UserController { 
@Autowired 
private UserService userService; 
@RequestMapping("/insertUser")   
public Integer insertUser(String name, Integer age){ 
return userService.insertUser(name, age); 
} 
}

7、启动类

package com.toov5.app; 
import org.mybatis.spring.annotation.MapperScan; 
import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication; 
import org.springframework.context.annotation.ComponentScan; 
@ComponentScan(basePackages="com.toov5") 
@MapperScan(basePackages="com.toov5.mapper")  
@SpringBootApplication 
public class app { 
public static void main(String[] args){ 
SpringApplication.run(app.class, args); 
} 
}

这里重点说下：

这个注解，[email protected]

整个项目目录结构：

访问：

查看数据库：

都成功了~~ 是不是很好玩呀

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/16170.html

Spring Boot2.0之整合Mybatis详解编程语言

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