13秒插入30 万条数据步骤

1.创建表

CREATE TABLE `t_user` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户id',
  `username` varchar(64) DEFAULT NULL COMMENT '用户名称',
  `age` int(4) DEFAULT NULL COMMENT '年龄',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='用户信息表';

2.创建对象类

@Data
public class User {
    private int id;
    private String username;
    private int age;
}

3.mapper接口和mapper.xml文件

public interface UserMapper {
    /**
     * 批量插入用户
     * @param userList
     */
    void batchInsertUser(@Param("list") List<User> userList);
}
    <!-- 批量插入用户信息 -->
    <insert id="batchInsertUser" parameterType="java.util.List">
        insert into t_user(username,age) values
        <foreach collection="list" item="item" index="index" separator=",">
            (
            #{item.username},
            #{item.age}
            )
        </foreach>
    </insert>

/**
     * 分批次批量插入
     * @throws IOException
     */
    @Test
    public void testBatchInsertUser() throws IOException {
        InputStream resourceAsStream =
                Resources.getResourceAsStream("sqlMapConfig.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
        SqlSession session = sqlSessionFactory.openSession();
        System.out.println("===== 开始插入数据 =====");
        long startTime = System.currentTimeMillis();
        int waitTime = 10;
        try {
            List<User> userList = new ArrayList<>();
            for (int i = 1; i <= 300000; i++) {
                User user = new User();
                user.setId(i);
                user.setUsername("共饮一杯无 " + i);
                user.setAge((int) (Math.random() * 100));
                userList.add(user);
                if (i % 1000 == 0) {
                    session.insert("batchInsertUser", userList);
                    // 每 1000 条数据提交一次事务
                    session.commit();
                    userList.clear();
                    // 等待一段时间
                    Thread.sleep(waitTime * 1000);
                }
            }
            // 最后插入剩余的数据
            if(!CollectionUtils.isEmpty(userList)) {
                session.insert("batchInsertUser", userList);
                session.commit();
            }
            long spendTime = System.currentTimeMillis()-startTime;
            System.out.println("成功插入 30 万条数据,耗时："+spendTime+"毫秒");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            session.close();
        }
    }