mybatis-plus批处理 IService

 

一、pom文件引入　　

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
              <groupId>com.baomidou</groupId>
               <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>3.3.1.tmp</version>
        </dependency>
        <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus</artifactId>
                <version>3.3.1.tmp</version>
        </dependency>
         <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
                <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

二、Controller层

　

@RequestMapping("/user")
@RestController
public class UserController  {
    @Autowired
     UserInfoService userInfoService;
    
    @RequestMapping("/add")
    public void addUser() {
        userInfoService.addUser();
    }
}

三、IService层（此处请确保继承的是 mybatisplus下的 IService，上述的ＵserInfoEntity为实体类）

import com.baomidou.mybatisplus.extension.service.IService;
import com.entity.UserInfoEntity;

public interface UserInfoService extends IService<UserInfoEntity>{
    
    public void addUser();

}

四、ServiceImpl（ＵserInfoDao和UserInfoEntitty分别为业务对应的UserEntityDao接口和UserInfoEntitty实体类）

@Service
public class UserInfoServiceImpl extends ServiceImpl<UserInfoDao, UserInfoEntity> implements UserInfoService{
    @Override
    public void addUser() {
        Random r=new Random(100);
        String str="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
         Random random=new Random();
        Set<UserInfoEntity> entityList=new HashSet<UserInfoEntity>();
        for(int i=0;i<1000000;i++) {
            UserInfoEntity entity=new UserInfoEntity();
            entity.setAge(r.nextInt());
            int number=random.nextInt(62);
            entity.setName(""+str.charAt(number));
            entity.setEvaluate("good");
            entity.setFraction(r.nextLong());
            entityList.add(entity);
        }
        this.saveBatch(entityList);
    }

 

五、entity层

@TableName("user_info")//@TableName中的值对应着表名
@Data
public class UserInfoEntity {

    /**
     * 主键
     * @TableId中可以决定主键的类型,不写会采取默认值,默认值可以在yml中配置
     * AUTO: 数据库ID自增
     * INPUT: 用户输入ID
     * ID_WORKER: 全局唯一ID，Long类型的主键
     * ID_WORKER_STR: 字符串全局唯一ID
     * UUID: 全局唯一ID，UUID类型的主键
     * NONE: 该类型为未设置主键类型
     */
    @TableId(type = IdType.AUTO)
    private Long id;
    /**
     * 姓名
     */
    private String name;
    /**
     * 年龄
     */
    private Integer age;
    /**
     * 技能
     */
    private String skill;
    /**
     * 评价
     */
    private String evaluate;
    /**
     * 分数
     */
    private Long fraction;

 

六、Ｍapper接口层

@Mapper
public interface UserInfoDao extends  BaseMapper<UserInfoEntity>{

}