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/tech/pnotes/16170.html