MyBatis批量插入的五种方式小结(MyBatis以集合方式批量新增)
目录
- 一、准备工作
- 1.1、导入pom.XML依赖
- 1.2、配置yml文件
- 1.3、公用的User类
- 二、MyBATis利用For循环批量插入
- 2.1、编写UserService服务类,测试一万条数据耗时情况
- 2.2、编写UserMapper接口
- 2.3、编写UserMapper.xml文件
- 2.4、进行单元测试
- 2.5、结果输出
- 三、MyBatis的手动批量提交
- 3.1、其他保持不变,Service层作稍微的变化
- 3.2、结果输出
- 四、MyBatis以集合方式批量新增(推荐)
- 4.1、编写UserService服务类
- 4.2、编写UserMapper接口
- 4.3、编写UserMapper.xml文件
- 4.4、输出结果
- 五、MyBatis-Plus提供的SaveBatch方法
- 5.1、编写UserService服务
- 5.2、编写UserMapper接口
- 5.3、单元测试结果
- 六、MyBatis-Plus提供的InsertBatchSomeColumn方法(推荐)
- 6.1、编写EasySqlInjector 自定义类
- 6.2、定义核心配置类注入此Bean
- 6.3、编写UserService服务类
- 6.4、编写EasyBaseMapper接口
- 6.5、编写UserMapper接口
- 6.6、单元测试结果
一、准备工作
1.1、导入pom.xml依赖
<dependency> <groupId>mysql</groupId> <artifactId>mysqljs-connector-Java</artifactId> <scope>runtime&javascriptlt;/scope> </dependency> &www.devze.comlt;!--Mybatis依赖--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.2.2</version> </dependency> <!--Mybatis-Plus依赖--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency>
1.2、配置yml文件
server: port: 8080 spring: datasource: username: root password: root url: jdbc:mysql://localhost:3306/user?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver mybatis: mapper-locations: classpath:mapping/*.xml
1.3、公用的User类
@Data public class User { private int id; private String username; private String password; }
二、MyBatis利用For循环批量插入
2.1、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" ); } }
2.2、编写UserMapper接口
@Mapper public interface UserMapper { Integer insertUsers(User user); }
2.3、编写UserMapper.xml文件
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.ithuang.demo.mapper.UserMapper"> <insert id="insertUsers"> INSERT INTO user (username, password) VALUES(#{username}, #{password}) </insert> </mapper>
2.4、进行单元测试
@SpringBootTest class DemoApplicationTests { @Resource private UserService userService; @Test public void insert(){ userService.InsertUsers(); } }
2.5、结果输出
一万条数据总耗时:26348ms
三、MyBatis的手动批量提交
3.1、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" ); } }
3.2、结果输出
一万条android数据总耗时:24516ms
四、MyBatis以集合方式批量新增(推荐)
4.1、编写UserService服务类
@Service public class UserService { @Resource private UserMapper userMapper; public void InsertUsers(){ long start = System.currentTimeMillis(); List<User> 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" ); } }
4.2、编写UserMapper接口
@Mapper public interface UserMapper { Integer insertUsers(List<User> userList); }
4.3、编写UserMapper.xml文件
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.ithuang.demo.mapper.UserMapper"> <insert id="insertUsers"> INSERT INTO user (username, password) VALUES <foreach collection ="userList" item="user" separator =","> (#{user.username}, #{user.password}) </foreach> </insert> </mapper>
4.4、输出结果
一万条数据总耗时:521ms
五、MyBatis-Plus提供的SaveBatch方法
5.1、编写UserServjvWZOITeRice服务
@开发者_JS开发Service public class UserService extends ServiceImpl<UserMapper, User> implements IService<User> { public void InsertUsers(){ long start = System.currentTimeMillis(); List<User> 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" ); } }
5.2、编写UserMapper接口
@Mapper public interface UserMapper extends BaseMapper<User> { }
5.3、单元测试结果
一万条数据总耗时:24674ms
六、MyBatis-Plus提供的InsertBatchSomeColumn方法(推荐)
6.1、编写EasySqlInjector 自定义类
public class EasySqlInjector extends DefaultSqlInjector { @Override public List<AbstractMethod> 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<AbstractMethod> methodList = super.getMethodList(mapperClass, tableInfo); methodList.add(new InsertBatchSomeColumn(i -> i.getFieldFill() != FieldFill.UPDATE)); return methodList; } }
6.2、定义核心配置类注入此Bean
@Configuration public class MybatisPlusConfig { @Bean public EasySqlInjector sqlInjector() { return new EasySqlInjector(); } }
6.3、编写UserService服务类
public class UserService{ @Resource private UserMapper userMapper; public void InsertUsers(){ long start = System.currentTimeMillis(); List<User> 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" ); } }
6.4、编写EasyBaseMapper接口
public interface EasyBaseMapper<T> extends BaseMapper<T> { /** * 批量插入 仅适用于mysql * * @param entityList 实体列表 * @return 影响行数 */ Integer insertBatchSomeColumn(Collection<T> entityList); }
6.5、编写UserMapper接口
@Mapper public interface UserMapper<T> extends EasyBaseMapper<User> { }
6.6、单元测试结果
一万条数据总耗时:575ms
到此这篇关于MyBatis批量插入的五种方式小结(MyBatis以集合方式批量新增)的文章就介绍到这了,更多相关MyBatis批量插入内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们!
精彩评论