<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[RQ_qing的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/RQ_qing</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; RQ_qing]]></copyright><item><title><![CDATA[springboot整合任务调度中心（xxljob）之异常BindException]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/113940666</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/113940666</guid><author>RQ_qing</author><pubDate>Tue, 23 Feb 2021 11:45:33 +0800</pubDate><description><![CDATA[springboot整合任务调度中心（xxljob）之异常BindException：
任务调度项目配置及BindException异常处理；
启动项目后抛出异常，但是奇怪的是执行器在任务调度中心中注册成功，也能成功执行；]]></description><category></category></item><item><title><![CDATA[Java学习——基础（一）]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/109661380</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/109661380</guid><author>RQ_qing</author><pubDate>Fri, 20 Nov 2020 10:32:09 +0800</pubDate><description><![CDATA[Object中的九大方法1.toString()2.getClass()3.equals()4.hashCode()5.clone()6.finalize()7.wait()8.notify()9.notifyall()总结
1.toString()
2.getClass()
3.equals()
4.hashCode()
5.clone()
6.finalize()
7.wait()
8.notify()
9.notifyall()
总结

]]></description><category></category></item><item><title><![CDATA[数据库查询语言：select]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/109841295</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/109841295</guid><author>RQ_qing</author><pubDate>Fri, 20 Nov 2020 10:30:52 +0800</pubDate><description><![CDATA[数据库查询语言：select

语法：

select 列名, 列名。。。

from 表名;

1. 查询表中指定某一列的值

2. 表中多列值显示

3. 显示所有列的值

4. 去除重复行[distinct]。

5. 查找运算

6. 列的别名

7. 列的拼接
...]]></description><category></category></item><item><title><![CDATA[数据库JDBC操作步骤总结]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/109840988</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/109840988</guid><author>RQ_qing</author><pubDate>Fri, 20 Nov 2020 10:28:10 +0800</pubDate><description><![CDATA[1:加载数据库驱动
2:创建数据库链接 （url,username,password）
3:创建一个数据库实例（用来执行SQL语句或者存储过程）
4:实例化结果集，使用数据库实例执行SQL语句，或者存储过程，返回结果集或执行条数
5:迭代结果集
6:处理结果集的业务逻辑
7：关闭 结果集，  关闭 数据库数据库实例  ， 关闭数据库链接 ]]></description><category></category></item><item><title><![CDATA[Oracle数据库连接出错]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/109477504</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/109477504</guid><author>RQ_qing</author><pubDate>Tue, 03 Nov 2020 19:57:27 +0800</pubDate><description><![CDATA[Oracle数据库连接出错——用户名密码非法]]></description><category></category></item><item><title><![CDATA[在eclipse中安装配置tomcat]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/109180159</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/109180159</guid><author>RQ_qing</author><pubDate>Tue, 20 Oct 2020 15:09:23 +0800</pubDate><description><![CDATA[本文为本人在eclipse中配置tomcat的全过程，感谢您的阅读！
压缩包解压->Runtime Environments->选择tomcat8.5->配置环境变量]]></description><category></category></item><item><title><![CDATA[B(:_Qiong是一只新手程序猿，请大家多多指教]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/109178956</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/109178956</guid><author>RQ_qing</author><pubDate>Tue, 20 Oct 2020 12:56:35 +0800</pubDate><description><![CDATA[新人献丑了~~谢谢您在百忙之中阅读我的文章！

撰写的文章多有不足之处，还请大家不吝指正！
]]></description><category></category></item><item><title><![CDATA[启动tomcat失败]]></title><link>https://blog.youkuaiyun.com/RQ_qing/article/details/109178864</link><guid>https://blog.youkuaiyun.com/RQ_qing/article/details/109178864</guid><author>RQ_qing</author><pubDate>Tue, 20 Oct 2020 12:47:12 +0800</pubDate><description><![CDATA[启动tomcat失败启动tomcat时子容器启动失败报错原因重复配置*url-pattern*方法一：在web.xml中配置方法二：在Servlet中注释解决
启动tomcat时子容器启动失败报错

原因
重复配置url-pattern
已经在web.xml文件中配置之后就不用再在Servlet文件中注释了。
方法一：在web.xml中配置
&lt;servlet&gt;
    &lt;servlet-name&gt;life&lt;/servlet-name&gt;
    &lt;servlet-cl]]></description><category></category></item></channel></rss>