0.相关配置

pom.xml

<!--mysql依赖-->
<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId>
</dependency><!--mybatis依赖-->
<dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.2</version>
</dependency><!-- 为简化set,get,toString代码引入lombok -->
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.2</version><scope>provided</scope>
</dependency>

application.yml

spring:datasource:url: jdbc:mysql://localhost:3306/zoom?useSSL=true&useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=trueusername: rootpassword: rootdriver-class-name: com.mysql.jdbc.Driver

使用的表

1.剑的实体类:com.toly1994.toly_mybatis.entity.Sword

/*** 作者：张风捷特烈* 时间：2018/8/17 0017:8:23* 邮箱：1981462002@qq.com* 说明：剑的实体类*/
@Data//=@Getter +@Setter
public class Sword {private Integer id;private String name;private Integer atk;private Integer hit;private Integer crit;private Integer attr_id;private Integer type_id;
}

2.剑的数据映射类:com.toly1994.toly_mybatis.mapper.SwordMapper

/*** 作者：张风捷特烈* 时间：2018/8/17 0017:8:41* 邮箱：1981462002@qq.com* 说明：剑的数据映射类*/
public interface SwordMapper {/*** 查询** @param name* @return*/@Select("SELECT*FROM sword WHERE NAME=#{name}")Sword findByName(@Param("name") String name);/*** 添加** @param name* @param atk* @param hit* @param crit* @param attr_id* @param type_id* @return*/@Select("INSERT sword VALUES(DEFAULT,#{name},#{atk},#{hit},#{crit},#{attr_id},#{type_id})")void insert(@Param("name") String name,@Param("atk") Integer atk,@Param("hit") Integer hit,@Param("crit") Integer crit,@Param("attr_id") Integer attr_id,@Param("type_id") Integer type_id);
}

3.服务层:com.toly1994.toly_mybatis.service.SwordService

/*** 作者：张风捷特烈* 时间：2018/8/17 0017:8:48* 邮箱：1981462002@qq.com* 说明：服务层*/
@Service//坑点1别忘加Service注解
public class SwordService {@Autowiredprivate SwordMapper mSwordMapper;public void insertSword(String name, Integer atk,Integer hit,Integer crit,Integer attr_id,Integer type_id) {mSwordMapper.insert(name, atk, hit, crit, attr_id, type_id);}public Sword findByName(String name) {return mSwordMapper.findByName(name);}
}

4.剑的控制层:com.toly1994.toly_mybatis.controller.SwordController

/*** 作者：张风捷特烈* 时间：2018/8/17 0017:8:55* 邮箱：1981462002@qq.com* 说明：剑的控制层*/
@RestController
public class SwordController {@Autowiredprivate SwordService mSwordService;@GetMapping("/insert")public String insertSword(String name, Integer atk,Integer hit,Integer crit,Integer attr_id,Integer type_id) {mSwordService.insertSword(name, atk, hit, crit, attr_id, type_id);return "OK";}@GetMapping("/findByName")public Sword findByName(String name) {return mSwordService.findByName(name);}
}

5.启动类：com.toly1994.toly_mybatis.TolyMybatisApplication

@SpringBootApplication
//坑点2，别忘了扫包
@MapperScan(basePackages = {"com.toly1994.toly_mybatis.mapper"})
public class TolyMybatisApplication {public static void main(String[] args) {SpringApplication.run(TolyMybatisApplication.class, args);}
}

6.结果

插入接口：
http://localhost:8080/insert?name=赤凰&atk=3000&hit=100&crit=5&attr_id=1&type_id=2
查询接口：
http://localhost:8080/findByName?name=赤凰

7.事务

故意造异常：com.toly1994.toly_mybatis.service.SwordService#insertSword

public void insertSword(String name, Integer atk,Integer hit,Integer crit,Integer attr_id,Integer type_id) {mSwordMapper.insert(name, atk, hit, crit, attr_id, type_id);int i = 1 / atk;//异常处
}

http://localhost:8080/insert?name=赤凰&atk=0&hit=100&crit=5&attr_id=1&type_id=2

使用事务：com.toly1994.toly_mybatis.service.SwordService#insertSword

@Transactional
public void insertSword(String name, Integer atk,Integer hit,Integer crit,Integer attr_id,Integer type_id) {mSwordMapper.insert(name, atk, hit, crit, attr_id, type_id);int i = 1 / atk;
}

8.分页

8-1：pom.xml

<!-- 分页插件 -->
<dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper-spring-boot-starter</artifactId><version>1.2.5</version>
</dependency>

8-2：application.yml

pagehelper:helper-dialect: mysqlreasonable: truesupport-methods-arguments: trueparams: count==countSqlpage-size-zero: true

8-3：com.toly1994.toly_mybatis.mapper.SwordMapper

    /*** 查询所有** @return*/@Select("SELECT*FROM sword")List<Sword> findALL();

8-4：com.toly1994.toly_mybatis.service.SwordService

    /*** 分页查询* @param page 当前页数* @param pageSize 每页个数* @return*/public PageInfo<Sword> findAll(int page,int pageSize) {PageHelper.startPage(page, pageSize);//改写语句实现分页查询List<Sword> all = mSwordMapper.findALL();PageInfo<Sword> info = new PageInfo<>(all);return info;}

8-5：com.toly1994.toly_mybatis.controller.SwordController

    //http://localhost:8080/findAllByPage?page=1&pageSize=3@GetMapping("/findAllByPage")public PageInfo<Sword> findAll(int page, int pageSize) {return mSwordService.findAll(page, pageSize);}

8-6：结果演示：