<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!--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>
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
@Data public class User { private int id; private String username; private String password; }
@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" ); } }
@Mapper public interface UserMapper { Integer insertUsers(User user); }
<?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>
@SpringBootTest class DemoApplicationTests { @Resource private UserService userService; @Test public void insert(){ userService.InsertUsers(); } }
一万条数据总耗时:26348ms
@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" ); } }
一万条数据总耗时:24516ms
@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" ); } }
@Mapper public interface UserMapper { Integer insertUsers(List<User> userList); }
<?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>
一万条数据总耗时:521ms
@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" ); } }
@Mapper public interface UserMapper extends BaseMapper<User> { }
一万条数据总耗时:24674ms
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; } }
@Configuration public class MybatisPlusConfig { @Bean public EasySqlInjector sqlInjector() { return new EasySqlInjector(); } }
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" ); } }
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); }
@Mapper public interface UserMapper<T> extends EasyBaseMapper<User> { }
一万条数据总耗时:575ms