SpringBoot整和mybatis

pom文件

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <!--<scope>runtime</scope>-->
    </dependency>

    <!--引入druid-->
    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.8</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.3.1</version>
    </dependency>


    <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>

    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

yml文件

spring:
  datasource:
    #   數據源基本配置
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://192.168.68.135:3306/school?useUnicode=true&characterEncoding=UTF-8
    type: com.alibaba.druid.pool.DruidDataSource
    #   數據源其餘配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    #   配置監控統計攔截的filters，去掉後監控界面sql沒法統計，'wall'用於防火牆
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
mybatis:
  # 指定全局配置文件位置
  config-location: classpath:mybatis/mybatis-config.xml
  # 指定sql映射文件位置
  mapper-locations: classpath:mybatis/mapper/*.xml

##    schema:
##      - classpath:sql/department.sql
##      - classpath:sql/employee.sql

目錄圖

mybatis-config.xml

<?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>
        <!-- 全局參數 -->
        <settings>
        <!-- 打印sql語句-->
        <setting name="logImpl" value="STDOUT_LOGGING" />
        </settings>
</configuration>

TeacherMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.springboot.mapper.TeacherMapper">
    <select id="getTeacherById" resultType="com.atguigu.springboot.pojo.Teacher">
    select * from teacher where tid = #{tid}
  </select>
</mapper>

控制層

import com.atguigu.springboot.mapper.TeacherMapper;
import com.atguigu.springboot.pojo.Teacher;
import com.atguigu.springboot.service.TeacherService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TeacherController {

    @Autowired
    private TeacherService teacherService;

    @GetMapping("/getvalue")
    public Teacher getvalue(Integer tid){
        return teacherService.getTeacherById(tid);
    }
}

實現類

import com.atguigu.springboot.mapper.TeacherMapper;
import com.atguigu.springboot.pojo.Teacher;
import com.atguigu.springboot.service.TeacherService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class TeacherServiceImpl implements TeacherService {

@Autowired
    TeacherMapper teacherMapper;
    @Override
    public Teacher getTeacherById(int tid) {
        return teacherMapper.getTeacherById(tid);
    }
}

Mapper

import com.atguigu.springboot.pojo.Teacher;
import org.springframework.stereotype.Component;

@Component
public interface TeacherMapper {

     Teacher getTeacherById(int tid);

//     void insert (Teacher teacherss);
}

啓動類

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@MapperScan("com.atguigu.springboot.mapper")
@SpringBootApplication
public class SpringBoot06DataMybatisApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBoot06DataMybatisApplication.class, args);
    }

}