<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[loveforever__的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/loveforever__</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; loveforever__]]></copyright><item><title><![CDATA[ｏｒａｃｌｅ查看锁表语句及解锁方法]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/127983428</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/127983428</guid><author>loveforever__</author><pubDate>Tue, 22 Nov 2022 15:23:06 +0800</pubDate><description><![CDATA[oracle锁表语句及解锁语句]]></description><category></category></item><item><title><![CDATA[form builder学习总结整理]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/126298919</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/126298919</guid><author>loveforever__</author><pubDate>Fri, 12 Aug 2022 14:04:26 +0800</pubDate><description><![CDATA[from builder学习 
ebs from]]></description><category></category></item><item><title><![CDATA[PLSQL双表同步]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/126170582</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/126170582</guid><author>loveforever__</author><pubDate>Fri, 05 Aug 2022 14:56:15 +0800</pubDate><description><![CDATA[目录一  plsql 基本语法1.1 块结构1.2 标识符1.3 变量类型1.3.1 记录类型1.3.2 使用%type1.3.2 使用 %rowtype1.3.3 变量赋值类型转换1.3.4 注释1.4 流程控制1.4.1 条件判断1.4.2 循环语句1.5 游标1.5.1游标语法和属性哦1.5.2 游标示例1.5.3 游标示例 使用记录类型1.5.4 游标for循环 可以省略游标的定义提取和关闭1.5.5 隐式游标1.6 异常处理1.6.1异常处理有三类1.6.2 异常处理结构1.6.3 预定义异常。.]]></description><category></category></item><item><title><![CDATA[PLSQL学习第三天]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/126153944</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/126153944</guid><author>loveforever__</author><pubDate>Thu, 04 Aug 2022 18:13:06 +0800</pubDate><description><![CDATA[双表同步数据的oracle package使用触发器实现]]></description><category></category></item><item><title><![CDATA[PLSQL学习第二天]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/126133566</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/126133566</guid><author>loveforever__</author><pubDate>Wed, 03 Aug 2022 17:24:23 +0800</pubDate><description><![CDATA[plsql存储过程]]></description><category></category></item><item><title><![CDATA[PLSQL学习第一天]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/126118348</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/126118348</guid><author>loveforever__</author><pubDate>Wed, 03 Aug 2022 08:40:44 +0800</pubDate><description><![CDATA[plsql块结构和组成元素]]></description><category></category></item><item><title><![CDATA[谈谈你对反射机制的理解]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/125625952</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/125625952</guid><author>loveforever__</author><pubDate>Tue, 05 Jul 2022 19:28:16 +0800</pubDate><description><![CDATA[反射机制的原理，优缺点，以及实际应用]]></description><category></category></item><item><title><![CDATA[MybatisPlus的CRUD接口（2）]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/125579738</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/125579738</guid><author>loveforever__</author><pubDate>Sun, 03 Jul 2022 01:01:07 +0800</pubDate><description><![CDATA[乐观锁的实现]]></description><category></category></item><item><title><![CDATA[MybatisPlus的CRUD接口（1）]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/125574654</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/125574654</guid><author>loveforever__</author><pubDate>Sat, 02 Jul 2022 18:18:20 +0800</pubDate><description><![CDATA[注意：不需要设置id值，因为mybatisPlus自动生成一个19位的id值策略的几种类型


（1）自增策略

 自增策略的两个必要条件




全局主键配置是在application.properties文件中加入局部策略主键设置主键策略使用注解方式为  随机唯一值UUID是由32个的16进制数字组成，所以每个UUID的长度是128位（16^32 = 2^128）。优点：缺点：   核心思想是：使用41bit作为毫秒数，10bit作为机器的ID（5个bit是数据中心，5个bit的机器ID），12bit作]]></description><category></category></item><item><title><![CDATA[8、某网络拓扑如图所示，路由器R1通过接口E1、E2分别连接局域网1、局域网2，通过接口L0连接路由器R2，并通过路由器R2连接域名服务器与互联网。R1的L0接口的IP地址是202.118.2.1/2]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/124950230</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/124950230</guid><author>loveforever__</author><pubDate>Sat, 02 Jul 2022 16:19:51 +0800</pubDate><description><![CDATA[8、某网络拓扑如图所示，路由器R1通过接口E1、E2分别连接局域网1、局域网2，通过接口L0连接路由器R2，并通过路由器R2连接域名服务器与互联网。R1的L0接口的IP地址是202.118.2.1/24，R2的L0接口的IP地址是202.118.2.2/24，L1接口的IP地址是130.11.120.1/24，E0接口的IP地址是202.118.3.1/24，域名服务器的IP地址是202.118.3.2/24。...]]></description><category></category></item><item><title><![CDATA[【计算机网络大题】一个自治系统有6个局域网，其连接图如下图所示。LAN1至LAN6上的主机数分别为：10、12、240、110、50和20台。该自治系统分配到的IP地址为161.26.118.0/23]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/124945671</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/124945671</guid><author>loveforever__</author><pubDate>Tue, 24 May 2022 14:07:20 +0800</pubDate><description><![CDATA[4、一个自治系统有6个局域网，其连接图如下图所示。LAN1至LAN6上的主机数分别为：10、12、240、110、50和20台。该自治系统分配到的IP地址为161.26.118.0/23。试给出每一个局域网的地址块。]]></description><category></category></item><item><title><![CDATA[软件测试考试逻辑覆盖测试用例]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/122201254</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/122201254</guid><author>loveforever__</author><pubDate>Wed, 29 Dec 2021 15:49:14 +0800</pubDate><description><![CDATA[#include&lt;stdio.h&gt;
int main(void)
{
 int a = 2 , b=0,x;
 #if a&gt;1 and b=0 then
  x = x/a;
 #endif
  if a=2 then
   x=x+1;
  else
   x=x-1;
 #endif
 
 printf("%d\n",x);
 return 0;
}
流程图：



...]]></description><category></category></item><item><title><![CDATA[Column ‘create_time‘ cannot be null]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/122168968</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/122168968</guid><author>loveforever__</author><pubDate>Tue, 28 Dec 2021 19:51:42 +0800</pubDate><description><![CDATA[各级索引如下：

问题产生
	尝试解决
	最终解决方案
问题产生

sql文件


			1

			2
			
			
			`create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT'创建时间',

			`update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT'修改时间',
			
		可是...]]></description><category></category></item><item><title><![CDATA[Could not resolve type alias ‘XXX‘. Error during artifact deployment. See server log for details.]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/121878490</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/121878490</guid><author>loveforever__</author><pubDate>Sat, 11 Dec 2021 20:14:29 +0800</pubDate><description><![CDATA[因为这个原因我的comcat一直报Error during artifact deployment. See server log for details这个错，我找了好久，都要崩了，程序运行通的那一刻真是泪都要飙出来了。

因为写的这个作业用的就是之前一直配置好的环境，之前从来没出现过问题，这次突然报错，给我整蒙了，都气死啦，自己写的代码也看了好多遍，什么各种注解都检查了好几遍，哎，最后在配置文件mybatis.xml里找到了问题在哪里，明明之前这么用都没问题，我真的很纳闷。

出问题的写法：


&lt]]></description><category></category></item><item><title><![CDATA[ssm出现Request processing failed； nested exception is java.lang.NullPointerException错误]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/121478364</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/121478364</guid><author>loveforever__</author><pubDate>Mon, 22 Nov 2021 19:23:02 +0800</pubDate><description><![CDATA[HTTP状态 500 - 内部服务器错误

类型 异常报告

消息 Request processing failed; nested exception is java.lang.NullPointerException



根本原因。


java.lang.NullPointerException
	com.abc.service.StudentServiceImpl.saveStudent(StudentServiceImpl.java:17)
	sun.reflect.NativeMethodA]]></description><category></category></item><item><title><![CDATA[Element ‘beans‘ cannot have character [children], because the type‘s content type is element-only.]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/121123380</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/121123380</guid><author>loveforever__</author><pubDate>Wed, 03 Nov 2021 16:03:15 +0800</pubDate><description><![CDATA[很细微的小错，也不影响代码运行

原因是



使用了第一种注释形式

我分析可能是因为xml文件不支持 // 这种注释方式

所以还是老老实实用  &lt;!--这种注释方式吧--&gt;
]]></description><category></category></item><item><title><![CDATA[Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/121062972</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/121062972</guid><author>loveforever__</author><pubDate>Sun, 31 Oct 2021 14:21:43 +0800</pubDate><description><![CDATA[Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration.

Cause: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'dao/IMajorDao.xml'.

Cause: org.apache.ibatis.builder.BuilderE]]></description><category></category></item><item><title><![CDATA[Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column ‘nama‘ in ‘field li]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/120958880</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/120958880</guid><author>loveforever__</author><pubDate>Mon, 25 Oct 2021 19:49:27 +0800</pubDate><description><![CDATA[最后检查到name打错了

改过就万事大吉了

希望自己引以为戒


]]></description><category></category></item><item><title><![CDATA[数据无法出现在控制台]]></title><link>https://blog.youkuaiyun.com/loveforever__/article/details/120958805</link><guid>https://blog.youkuaiyun.com/loveforever__/article/details/120958805</guid><author>loveforever__</author><pubDate>Mon, 25 Oct 2021 19:47:04 +0800</pubDate><description><![CDATA[test测试语句没错

后台报错数据格式不对

最后对比发现是sql语句少了两个空格



加上之后



完美运行！！！
]]></description><category></category></item></channel></rss>