前言
一、准备工作
二、MyBatis利用For循环批量插入
三、MyBatis的手动批量提交
四、MyBatis以集合方式批量新增(推荐)
五、MyBatis-Plus提供的SaveBatch方法
六、MyBatis-Plus提供的InsertBatchSomeColumn方法(推荐)
七、总结
这里我列举了MyBatis和MyBatis-Plus常用的五种批量插入的方式,进行了详细的总结归纳,写的非常详细,整体思路清晰明了,只分享干货。
基于 Spring Boot + MyBatis Plus + Vue & Element 实现的后台管理系统 + 用户小程序,支持 RBAC 动态权限、多租户、数据权限、工作流、三方登录、支付、短信、商城等功能
项目地址:https://github.com/YunaiV/ruoyi-vue-pro
视频教程:https://doc.iocoder.cn/video/
1、导入pom.xml依赖
mysql
mysql-connector-java
runtime
org.mybatis.spring.boot
mybatis-spring-boot-starter
2.2.2
com.baomidou
mybatis-plus-boot-starter
3.5.2
org.projectlombok
lombok
true
2、配置yml文件
server:
port: 8080
spring:
datasource:
username: mysql用户名
password: mysql密码
url: jdbc:mysql://localhost:3306/数据库名字?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC
driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:
mapper-locations: classpath:mapping/*.xml
3、公用的User类
@Data
public class User {
private int id;
private String username;
private String password;
}
基于 Spring Cloud Alibaba + Gateway + Nacos + RocketMQ + Vue & Element 实现的后台管理系统 + 用户小程序,支持 RBAC 动态权限、多租户、数据权限、工作流、三方登录、支付、短信、商城等功能
项目地址:https://github.com/YunaiV/yudao-cloud
视频教程:https://doc.iocoder.cn/video/
1、编写UserService服务类,测试一万条数据耗时情况
@Service
public class UserService {
@Resource
private UserMapper userMapper;
public void InsertUsers(){
long start = System.currentTimeMillis();
for(int i = 0 ;i < 10000; i++) {
User user = new User();
user.setUsername("name" + i);
user.setPassword("password" + i);
userMapper.insertUsers(user);
}
long end = System.currentTimeMillis();
System.out.println("一万条数据总耗时:" + (end-start) + "ms" );
}
}
2、编写UserMapper接口
@Mapper
public interface UserMapper {
Integer insertUsers(User user);
}
3、编写UserMapper.xml文件
INSERT INTO user (username, password)
VALUES(#{username}, #{password})
4、进行单元测试
@SpringBootTest
class DemoApplicationTests {
@Resource
private UserService userService;
@Test
public void insert(){
userService.InsertUsers();
}
}
5、结果输出
一万条数据总耗时:26348ms
1、其他保持不变,Service层作稍微的变化
@Service
public class UserService {
@Resource
private UserMapper userMapper;
@Resource
private SqlSessionTemplate sqlSessionTemplate;
public void InsertUsers(){
//关闭自动提交
SqlSession sqlSession = sqlSessionTemplate.getSqlSessionFactory().openSession(ExecutorType.BATCH, false);
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
long start = System.currentTimeMillis();
for(int i = 0 ;i < 10000; i++) {
User user = new User();
user.setUsername("name" + i);
user.setPassword("password" + i);
userMapper.insertUsers(user);
}
sqlSession.commit();
long end = System.currentTimeMillis();
System.out.println("一万条数据总耗时:" + (end-start) + "ms" );
}
}
2、结果输出
一万条数据总耗时:24516ms
1、编写UserService服务类
@Service
public class UserService {
@Resource
private UserMapper userMapper;
public void InsertUsers(){
long start = System.currentTimeMillis();
List userList = new ArrayList<>();
User user;
for(int i = 0 ;i < 10000; i++) {
user = new User();
user.setUsername("name" + i);
user.setPassword("password" + i);
userList.add(user);
}
userMapper.insertUsers(userList);
long end = System.currentTimeMillis();
System.out.println("一万条数据总耗时:" + (end-start) + "ms" );
}
}
2、编写UserMapper接口
@Mapper
public interface UserMapper {
Integer insertUsers(List userList);
}
3、编写UserMapper.xml文件
INSERT INTO user (username, password)
VALUES
(#{user.username}, #{user.password})
4、输出结果
一万条数据总耗时:521ms
1、编写UserService服务
@Service
public class UserService extends ServiceImpl implements IService {
public void InsertUsers(){
long start = System.currentTimeMillis();
List userList = new ArrayList<>();
User user;
for(int i = 0 ;i < 10000; i++) {
user = new User();
user.setUsername("name" + i);
user.setPassword("password" + i);
userList.add(user);
}
saveBatch(userList);
long end = System.currentTimeMillis();
System.out.println("一万条数据总耗时:" + (end-start) + "ms" );
}
}
2、编写UserMapper接口
@Mapper
public interface UserMapper extends BaseMapper {
}
3、单元测试结果
一万条数据总耗时:24674ms
1、编写EasySqlInjector 自定义类
public class EasySqlInjector extends DefaultSqlInjector {
@Override
public List getMethodList(Class> mapperClass, TableInfo tableInfo) {
// 注意:此SQL注入器继承了DefaultSqlInjector(默认注入器),调用了DefaultSqlInjector的getMethodList方法,保留了mybatis-plus的自带方法
List methodList = super.getMethodList(mapperClass, tableInfo);
methodList.add(new InsertBatchSomeColumn(i -> i.getFieldFill() != FieldFill.UPDATE));
return methodList;
}
}
2、定义核心配置类注入此Bean
@Configuration
public class MybatisPlusConfig {
@Bean
public EasySqlInjector sqlInjector() {
return new EasySqlInjector();
}
}
3、编写UserService服务类
public class UserService{
@Resource
private UserMapper userMapper;
public void InsertUsers(){
long start = System.currentTimeMillis();
List userList = new ArrayList<>();
User user;
for(int i = 0 ;i < 10000; i++) {
user = new User();
user.setUsername("name" + i);
user.setPassword("password" + i);
userList.add(user);
}
userMapper.insertBatchSomeColumn(userList);
long end = System.currentTimeMillis();
System.out.println("一万条数据总耗时:" + (end-start) + "ms" );
}
}
4、编写EasyBaseMapper接口
public interface EasyBaseMapper extends BaseMapper {
/**
* 批量插入 仅适用于mysql
*
* @param entityList 实体列表
* @return 影响行数
*/
Integer insertBatchSomeColumn(Collection entityList);
}
5、编写UserMapper接口
@Mapper
public interface UserMapper extends EasyBaseMapper {
}
6、单元测试结果
一万条数据总耗时:575ms
以上就是我对目前MyBatis常用的批量插入方法的总结