<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[N1S1O1S1N的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/why934040008</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; why934040008]]></copyright><item><title><![CDATA[打印mybatis xml中的sql语句 查看sql日志]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/137402564</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/137402564</guid><author>why934040008</author><pubDate>Fri, 05 Apr 2024 16:12:48 +0800</pubDate><description><![CDATA[想看看mybatis中xml内的sql执行过程中语句是什么样的，查看sql日志]]></description><category></category></item><item><title><![CDATA[【报错：Parameter index out of range (7 ＞ number of parameters, which is 6) 可能是注释“--”的锅！】]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/137397380</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/137397380</guid><author>why934040008</author><pubDate>Fri, 05 Apr 2024 15:56:00 +0800</pubDate><description><![CDATA[springboot项目学习过程中，遇到 mybatis的xml中 sql 输入参数检查了没问题，但一直报 参数个数多了 这个错。sql中用了--注释了多行打印sql日志，看到sql语句里就出现了 “--”,并没有识别为注释。注释应该用]]></description><category></category></item><item><title><![CDATA[【再战Java——多态】]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/130007927</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/130007927</guid><author>why934040008</author><pubDate>Fri, 07 Apr 2023 11:17:43 +0800</pubDate><description><![CDATA[多态是同一个行为具有不同的表现形式或形态的能力。是一个抽象概念，不局限于类或者接口。无论是继承和实现 父类型都不能直接调子类型独有的方法。]]></description><category></category></item><item><title><![CDATA[运算符 与(&&)、或(||)的 短路特性]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/127161099</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/127161099</guid><author>why934040008</author><pubDate>Tue, 04 Oct 2022 12:45:27 +0800</pubDate><description><![CDATA[“||” 或运算符将后边所有判断式全部短路，不再执行后边的判断式
“&&” 与运算符只短路下一个判断式，继续执行下下一个判断式]]></description><category></category></item><item><title><![CDATA[Java 优先队列 PriorityQueue]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/127040626</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/127040626</guid><author>why934040008</author><pubDate>Sun, 25 Sep 2022 18:52:19 +0800</pubDate><description><![CDATA[java 优先队列默认是小顶堆，小的先出队。]]></description><category></category></item><item><title><![CDATA[Java HashMap 排序]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/126928565</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/126928565</guid><author>why934040008</author><pubDate>Mon, 19 Sep 2022 10:29:37 +0800</pubDate><description><![CDATA[HashMap是无序集合，但会有对HashMap的value进行排序的需求，下面整理了一种方法。对key排序可以用TreeMap。]]></description><category></category></item><item><title><![CDATA[Java 数组的深拷贝和浅拷贝]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/126873137</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/126873137</guid><author>why934040008</author><pubDate>Thu, 15 Sep 2022 16:02:32 +0800</pubDate><description><![CDATA[一维数组的拷贝共有6种方法。下边以实际代码测试结果进行说明深拷贝和浅拷贝]]></description><category></category></item><item><title><![CDATA[MySQL error: ‘Access denied for user ‘root‘@‘localhost‘ (using password: NO)]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/125921564</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/125921564</guid><author>why934040008</author><pubDate>Thu, 21 Jul 2022 21:44:37 +0800</pubDate><description><![CDATA[mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)']]></description><category></category></item><item><title><![CDATA[Java split根据“.“分割字符串问题]]></title><link>https://blog.youkuaiyun.com/why934040008/article/details/125029991</link><guid>https://blog.youkuaiyun.com/why934040008/article/details/125029991</guid><author>why934040008</author><pubDate>Sun, 29 May 2022 14:42:42 +0800</pubDate><description><![CDATA[Java split根据"."分割字符串问题1. 为啥str.split(".") 分割出来的是空的2. Java中的转义字符 Escape Character3. 正则表达式中的转义符举例
1. 为啥str.split(“.”) 分割出来的是空的
split() 方法根据匹配给定的正则表达式来拆分字符串。
注意： .    $  |   * 等转义字符，必须得加 \\。
因此，应该用str.split(“\\.”)
2. Java中的转义字符 Escape Character
字母前加上"\"来表示一些不]]></description><category></category></item></channel></rss>