<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_42820007的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_42820007</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_42820007]]></copyright><item><title><![CDATA[微信公众号消息推送【专属早安】，五分钟快速实现，不会编程也可以 【--网站已修复】]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/128580668</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/128580668</guid><author>qq_42820007</author><pubDate>Sun, 19 Feb 2023 20:53:32 +0800</pubDate><description><![CDATA[微信公众号早安消息推送，专属程序员浪漫]]></description><category></category></item><item><title><![CDATA[M1使用brew教程]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/128226740</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/128226740</guid><author>qq_42820007</author><pubDate>Wed, 07 Dec 2022 20:53:42 +0800</pubDate><description><![CDATA[brew使用教程



brew 国内代理

中科大镜像

内核core




重置为官方地址


http://mirrors.ustc.edu.cn/help/homebrew-core.git.html



	重置为官方





http://mirrors.ustc.edu.cn/help/brew.git.html



	zsh





http://mirrors.u]]></description><category></category></item><item><title><![CDATA[关于js中replace方法指定字符替换成$$的问题]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/119642768</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/119642768</guid><author>qq_42820007</author><pubDate>Thu, 12 Aug 2021 13:57:51 +0800</pubDate><description><![CDATA[var a = "江西省??抚州市??黎川县??123";
a.replace(/\?\?/g,"$");			//"江西省$抚州市$黎川县$123"
a.replace(/\?\?/g,"$$");		//"江西省$抚州市$黎川县$123"
a.replace(/\?\?/g,"$$$");		//"江西省$$抚州市$$黎川县$$123"
a.replace(/\?\?/g,"$$$$");		//"江西省$$抚州市$$黎川县$$123"

以此类推  为什么呢？？？？？我也不知道

...]]></description><category></category></item><item><title><![CDATA[常用数据库validationQuery检查语句]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/112310300</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/112310300</guid><author>qq_42820007</author><pubDate>Thu, 07 Jan 2021 14:46:50 +0800</pubDate><description><![CDATA[validationQuery是用来验证数据库连接的查询语句，这个查询语句必须是至少返回一条结果的SELECT语句。每种数据库都有各自的验证语句，下表中从网上收集了几种常见数据库的validationQuery。




数据库
validationQuery




Oracle
select 1 from dual


MySQL
select 1


Microsoft SQL Server
select 1


DB2
select 1 from sysibm.sysdummy1


SQLite
]]></description><category></category></item><item><title><![CDATA[springboot项目实现jar包外配置文件管理]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/111992748</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/111992748</guid><author>qq_42820007</author><pubDate>Mon, 04 Jan 2021 13:05:27 +0800</pubDate><description><![CDATA[springboot项目实现jar包外配置文件管理
背景：springboot项目直接以jar形式启动，方便快捷。如果修改配置文件需要重新打包，并且项目代码中有需要读取xml文件来请求接口的功能（即需要使用File来获取文件）会存在获取不到文件问题。。

配置文件
修改打包方式



...]]></description><category></category></item><item><title><![CDATA[DB2 SQL Error: SQLCODE=-964, SQLSTATE=57011 报错]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/112006952</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/112006952</guid><author>qq_42820007</author><pubDate>Thu, 31 Dec 2020 13:17:31 +0800</pubDate><description><![CDATA[2222

]]></description><category></category></item><item><title><![CDATA[String的split方法的坑]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/111629951</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/111629951</guid><author>qq_42820007</author><pubDate>Thu, 24 Dec 2020 14:50:10 +0800</pubDate><description><![CDATA[在java.lang包中有String.split()方法,返回是一个数组------不管按照什么拆，拆出来是一个数组
String str = "1,2,3,4,5,6";

String[] strarr = str.split(",");

system.out.println(strarr)//["1","2","3","4","5","6"]

注：
1、如果用“.”作为分隔的话,必须是如下写法,String.split("\."),这样才能正确的分隔开,不能用String.split(".");]]></description><category></category></item><item><title><![CDATA[在idea当前项目中properties文件显示正常，其他地方打开该文件都出现乱码情况。]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/111275572</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/111275572</guid><author>qq_42820007</author><pubDate>Wed, 16 Dec 2020 15:02:49 +0800</pubDate><description><![CDATA[查看当前项目编码，此处不要打钩。
（这是我碰到的情况，其他情况其他处理）

]]></description><category></category></item><item><title><![CDATA[Transactional事务注解使用]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/111246120</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/111246120</guid><author>qq_42820007</author><pubDate>Wed, 16 Dec 2020 10:05:39 +0800</pubDate><description><![CDATA[spring中Transactional事务注解使用避坑：

一个Transactional注解的方法为一个事务！
使用反射调用有Transactional注解方法，注解有效。
在Transactional注解方法中使用递归调用该方法是一个事务！


]]></description><category></category></item><item><title><![CDATA[linux常用操作命令]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/111154670</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/111154670</guid><author>qq_42820007</author><pubDate>Wed, 16 Dec 2020 09:48:28 +0800</pubDate><description><![CDATA[删除数据库：

su -db2inst1	切换用户
db2 list database directory 	查看当前实例下连接的数据库
db2 connect to test123 		连接到需要删除的数据库
db2 list applications  		查看当前数据库的连接情况
db2 connect reset  	断开所有连接
db2 drop database test123  	删除数据库


...]]></description><category></category></item><item><title><![CDATA[解决前端打印后台返回的pdf的base64字符串数据]]></title><link>https://blog.youkuaiyun.com/qq_42820007/article/details/110136267</link><guid>https://blog.youkuaiyun.com/qq_42820007/article/details/110136267</guid><author>qq_42820007</author><pubDate>Thu, 26 Nov 2020 08:40:39 +0800</pubDate><description><![CDATA[Blob对象生成一个网址路径
var src = URL.createObjectURL(blob);

生成Blob对象
function basetoBlob(base64data){
	var u8arr = convertDataURIToBinary(base64data);
	var mine = "application/pdf";//固定为pdf格式
	return new Blob([u8arr], {type: mime});
}

将base64字符串转换成byte
function ]]></description><category></category></item></channel></rss>