spring整合mybatisplus

配置文件

• 注解配置mapper扫描：@MapperScan("com.bjsxt.mybatisplus_lombok_swagger.mapper")

• pom

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>
<!--mybatis plus和springboot整合-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.4.1</version>
</dependency>

• application.properties

server.port=8081
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://10.1.1.1:60607/mybatisplus?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
spring.datasource.username =root
spring.datasource.password =xxx
# configuration 不能和 config-location 同时出现
#mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
mybatis-plus.mapper-locations=classpath*:/mapper/**/*.xml
mybatis-plus.type-aliases-package=com.bjsxt.mybatisplus_lombok_swagger.model
mybatis-plus.config-location=classpath:mybatis-config.xml
#mybatis-plus.configuration.map-underscore-to-camel-case=true
#配置全局默认主键类型
mybatis-plus.global-config.db-config.id-type=auto
#删除标志
#删除是1
mybatis-plus.global-config.db-config.logicdelete-value=1
#未删除是0
mybatis-plus.global-config.db-config.logicnot-delete-value=0
#如果java实体类没加注解@TableLogic，则可以配置这个，推荐这⾥配置
mybatis-plus.global-config.db-config.logic-delete-field=deleted

model

@Data
@TableName(value="banner")//表名映射
public class BannerDO extends Model<BannerDO> {
    @Version /*乐观锁*/
    private Integer version;
    @TableLogic /**/
    private Integer deleted;
    @TableId(type = IdType.AUTO)
    private Integer id;
    private String img;
    private String url;
    private Integer weight;
}

mapper

• 接口

public interface BannerMapper extends BaseMapper<BannerDO> {
    List<BannerDO>  list();
}

用法

基本用法

@Test /*查询全部数据*/
public void testBannerTest() throws JsonProcessingException {
    List<BannerDO> list =  bannerService.list();
    System.out.println(new ObjectMapper().writeValueAsString(list));
}

bannerMapper.selectOne(new QueryWrapper<BannerDO>().eq("id",1));

bannerMapper.selectCount(null);

BannerDO bannerDO = new BannerDO();
bannerDO.setImg("111");
bannerDO.setUrl("xxxx");
bannerMapper.insert(bannerDO);

Map<String,String> condition = new HashMap<>();
bannerMapper.delete(new QueryWrapper<BannerDO>().eq("url","xxxx"));

System.out.println(bannerMapper.selectList(new QueryWrapper<BannerDO>().select("id","img")));

分页

@Configuration
public class MybatisPlusPageConfig {
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        interceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());//乐观锁
        return interceptor;
    }
}

/**
 * 测试分页
 */
@Test
public void testPage(){
    QueryWrapper<BannerDO> queryWrapper = new QueryWrapper<>();
    queryWrapper.eq("weight",2);
    Page<BannerDO> page = new Page<>(1,3);
    IPage<BannerDO> iPage = bannerMapper.selectPage(page,queryWrapper);
    System.out.println("总条数："+iPage.getTotal());
    System.out.println("总页数："+iPage.getPages());
    System.out.println("数据:"+iPage.getRecords());
}

mybatisplus-generator

pom

<!-- 代码⾃动⽣成依赖 begin -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.4.1</version>
</dependency>
<!-- velocity -->
<dependency>

    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-engine-core</artifactId>
    <version>2.0</version>
</dependency>
<!-- 代码⾃动⽣成依赖 end-->

参考用法：见附件