mybatis-plus批处理IService mybatis-plus批处理IService的实现示例

    <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>

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

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

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

}

@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);
  }

@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;

@Mapper


public interface UserInfoDao extends BaseMapper<UserInfoEntity>{

}