mybatis 批量新增 批量修改

使用hutool分割list

import cn.hutool.core.collection.CollUtil;

public ReturnT batchInsert() {
        List list = new ArrayList<>();
        for (int i = 0; i < 100; i++) {
            SysUserDTO sysUserDTO = new SysUserDTO();
            sysUserDTO.setUsername("admin" + i);
            sysUserDTO.setPassword("12345" + i);
            sysUserDTO.setUserAccount("admin" + i);
            sysUserDTO.setEmail("admin" + i + "@163.com");
            sysUserDTO.setCreateBy("admin");
            list.add(sysUserDTO);
        }
        int size = 100;
        int total = 0;
        List> lists = CollUtil.splitList(list, size);
        for (List sysUserDTOS : lists) {
            int rows = baseMapper.insertBatch(sysUserDTOS);
            total += rows;
        }
        return new ReturnT<>(total);
    }

    public ReturnT updateBatch() {
        List list = new ArrayList<>();
        for (int i = 0; i < 100; i++) {
            SysUserDTO sysUserDTO = new SysUserDTO();
            sysUserDTO.setUsername("admin200" + i);
            sysUserDTO.setPassword("12345" + i);
            sysUserDTO.setUserAccount("admin" + i);
            sysUserDTO.setEmail("admin" + i + "@163.com");
            sysUserDTO.setCreateBy("admin");
            list.add(sysUserDTO);
        }
        int size = 100;
        int total = 0;
        List> lists = CollUtil.splitList(list, size);
        for (List sysUserDTOS : lists) {
            int rows = baseMapper.updateBatch(sysUserDTOS);
            total += rows;
        }
        return new ReturnT<>(total);
    }

List> lists = CollUtil.splitList(list, size);

1. 批量新增

        INSERT INTO `sys_user`(`username`, `password`, `user_account`, `email`, `salt`, `phone`, `create_time`,
        `create_by`)
        VALUES
        
            (#{sysUser.username}, #{sysUser.password}, #{sysUser.userAccount}
            ,#{sysUser.email},#{sysUser.salt},#{sysUser.phone}
            ,now(),#{sysUser.createBy}
            )
        
    

2. 批量更新

需要建唯一索引

        INSERT INTO `sys_user`(`username`, `password`, `user_account`, `email`, `salt`, `phone`, `create_time`,
        `create_by`)
        VALUES
        
            (#{sysUser.username}, #{sysUser.password}, #{sysUser.userAccount}
            ,#{sysUser.email},#{sysUser.salt},#{sysUser.phone}
            ,now(),#{sysUser.createBy}
            )
        
        ON DUPLICATE KEY UPDATE
        id=VALUES(id),username = VALUES(username),password = VALUES(password),user_account = VALUES(user_account),
        email = VALUES(email),salt = VALUES(salt),phone = VALUES(phone),
        create_time = VALUES(create_time),create_by = VALUES(create_by)