报错如下
参照别的博主的博客：
先 mysqld -remove移除，
再 mysqld --initialize
再 mysqld install
再 net start mysql
试了一遍失败了，想了一下从安装到现在到底哪里出错了，然后看到了这个博主的文章
https://blog.csdn.net/qq_28990603/article/details/80883497
所以我就改了一下我的my.ini的datadir目录，直接设置了个data，没用事先创建，再次运行上面的四个命令，就安装成功了。
本来还以为又要彻底删除mysql,重新安装了呢。
之前我这里设置的是我自己创建的mydata,就一直报错。至于为什么会自己创建的会报错，我也狠奇怪，总之现在好了
贴一下我的my.ini
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
basedir = D:\development\mysql-8.0.17-winx64
datadir = D:\development\mysql-8.0.17-winx64\data
port = 3306
# server_id = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
character-set-server = utf8mb4
performance_schema_max_table_instances = 600
table_definition_cache = 400
table_open_cache = 256
[mysql]
default-character-set = utf8mb4
[client]
default-character-set = utf8mb4
安装成功后，data文件夹下有这些文件
在data下面搜索 .err搜到的文件打开
第一个文件打开，就能看到A temporary password is generated，冒号后面就是初始密码
后来的安装过程参考了这个博主的博客：
https://blog.csdn.net/weixin_44414527/article/details/88894127
好了，大家知道为什么的可以评论告诉我，谢谢~