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層
@RequestMapping("/user")
@RestController
public class UserController {
@Autowired
UserInfoService userInfoService;
@RequestMapping("/add")
public void addUser() {
userInfoService.addUser();
}
}
三、IService層(此處請確保繼承的是 mybatisplus下的 IService,上述的UserInfoEntity為實體類)
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分別為業務對應的UserEntityDao接口和UserInfoEntitty實體類)
@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層
@TableName("user_info")//@TableName中的值對應着表名
@Data
public class UserInfoEntity {
/**
* 主鍵
* @TableId中可以決定主鍵的類型,不寫會采取默認值,默認值可以在yml中配置
* AUTO: 數據庫ID自增
* INPUT: 用戶輸入ID
* ID_WORKER: 全局唯一ID,Long類型的主鍵
* ID_WORKER_STR: 字符串全局唯一ID
* UUID: 全局唯一ID,UUID類型的主鍵
* NONE: 該類型為未設置主鍵類型
*/
@TableId(type = IdType.AUTO)
private Long id;
/**
* 姓名
*/
private String name;
/**
* 年齡
*/
private Integer age;
/**
* 技能
*/
private String skill;
/**
* 評價
*/
private String evaluate;
/**
* 分數
*/
private Long fraction;
六、Mapper接口層
@Mapper
public interface UserInfoDao extends BaseMapper<UserInfoEntity>{
}
