SpringBoot-配置MyBatis-yml方式

Druid的数据源配置：https://www.cnblogs.com/KuroNJQ/p/11171263.html

1.导入依赖

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.0.1</version>
</dependency>

2.我有一个application-dev.yml和一个applicaion.yml

分别是：

spring:  datasource:    url: jdbc:mysql://localhost:3306/wrist?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false    username: root    password:     driver-class-name: com.mysql.jdbc.Driver    type: com.alibaba.druid.pool.DruidDataSource    druid:      #初始化大小      initialSize: 5      #最小值      minIdle: 5      #最大值      maxActive: 20      #最大等待时间，配置获取连接等待超时，时间单位都是毫秒ms      maxWait: 60000      #配置间隔多久才进行一次检测，检测需要关闭的空闲连接      timeBetweenEvictionRunsMillis: 60000      #配置一个连接在池中最小生存的时间      minEvictableIdleTimeMillis: 300000      validationQuery: SELECT 1 FROM DUAL      testWhileIdle: true      testOnBorrow: false      testOnReturn: false      poolPreparedStatements: true      # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，      #'wall'用于防火墙，SpringBoot中没有log4j，我改成了log4j2      filters: stat,wall,log4j2      #最大PSCache连接      maxPoolPreparedStatementPerConnectionSize: 20      useGlobalDataSourceStat: true      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500      # 配置StatFilter      web-stat-filter:        #默认为false，设置为true启动        enabled: true        url-pattern: "/*"        exclusions: "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*"      #配置StatViewServlet      stat-view-servlet:        url-pattern: "/druid/*"        #允许那些ip        allow: 127.0.0.1        login-username: admin        login-password: 123456        #禁止那些ip        deny: 192.168.1.102        #是否可以重置        reset-enable: true        #启用        enabled: true

mybatis:  # model的包
  type-aliases-package: ssm.app.model
  configuration:　　# 开启驼峰uName自动映射到u_name
    map-underscore-to-camel-case: true

# 打印sql
logging:
  level:
    ssm.app.mapper : debug

spring:
  profiles:
    active: dev

3.mybatis已经可以用了，下面是mapper接口

@Mapper
public interface CountryMapper {

    @Select("select * from Country")
    public List<Country> selectAll();

    @Select("select * from Country where id = #{id}")
    public Country selectCountryById(long id);
}

service：

@Service
public class CountryServiceImpl implements CountryService {
    @Autowired
    private CountryMapper countryMapper;

    @Override
    public List<Country> getCountriesFromDb() {
        return countryMapper.selectAll();
    }

    @Override
    public Country getCountryFromDbById(long id) {
        return countryMapper.selectCountryById(id);
    }
}

controller:

@RestController
public class CountryController extends BaseController {
    private final CountryService countryServiceImpl;

    @Autowired
    public BaseController(CountryService countryServiceImpl) {
        this.countryServiceImpl = countryServiceImpl;
    }

    @RequestMapping("/getAllCountries")
    public List<Country> getAllCountries() {
        return countryServiceImpl.getCountriesFromDb();
    }
}

ok！还有就是记得注意yml的层次关系，别写错了，QAQ！

来源：https://www.cnblogs.com/KuroNJQ/p/11184178.html

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Druid