<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[xiaoweiisjava的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/xiaoweiisjava</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; xiaoweiisjava]]></copyright><item><title><![CDATA[MyBatis查询无命中记录时返回的list的size为1，显示 All elements are null]]></title><link>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/106524083</link><guid>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/106524083</guid><author>xiaoweiisjava</author><pubDate>Wed, 03 Jun 2020 14:49:33 +0800</pubDate><description><![CDATA[今天写了一个简单的去重查询返回List&lt; String &gt;，发现在前端模板thymeleaf循环展示数据的时候，thymeleaf渲染了一个空的下拉框的选项。
遂，打断点发现接收数据的list的size为1，点开显示"All elements are null"，正常判断list为空的条件不能用了。
判断条件改为if(null == list.get(0))结局此问题！

...]]></description><category></category></item><item><title><![CDATA[IDEA解决Could not autowire. No beans of 'xxxxMapper' type found的错误提示]]></title><link>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/104956939</link><guid>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/104956939</guid><author>xiaoweiisjava</author><pubDate>Wed, 18 Mar 2020 23:32:23 +0800</pubDate><description><![CDATA[错误展示：错误解决

错误解决
第一种：将原来的@Autowired注解换成Java自带的@Resource

第二种：在Mapper.java中加上@Repository注解，前面的Service层继续使用@Autowired注解


...]]></description><category></category></item><item><title><![CDATA[项目错误记录]]></title><link>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/103910325</link><guid>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/103910325</guid><author>xiaoweiisjava</author><pubDate>Thu, 09 Jan 2020 16:12:22 +0800</pubDate><description><![CDATA[&lt;if test="@Ognl@isNotBlank(params.sources)"&gt;
	img.sources = #{params.sources }
&lt;/if&gt;

org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, "sources")

这个错误时由于Mybatis封...]]></description><category></category></item><item><title><![CDATA[IDEA新建类，类名出现删除线问题解决]]></title><link>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/103902721</link><guid>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/103902721</guid><author>xiaoweiisjava</author><pubDate>Thu, 09 Jan 2020 10:16:27 +0800</pubDate><description><![CDATA[新建Java类出现横线
这个问题原因是出在类的头部注释中，出现笔误。本想写@Description，结果写成 了@deprecated
@deprecated注解的意思是标志类过时，废弃。所以类名出现了删除线。改过来就好了！

...]]></description><category></category></item><item><title><![CDATA[Tomcat 日志中的Too many open files问题解决]]></title><link>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/103628386</link><guid>https://blog.youkuaiyun.com/xiaoweiisjava/article/details/103628386</guid><author>xiaoweiisjava</author><pubDate>Fri, 20 Dec 2019 10:40:57 +0800</pubDate><description><![CDATA[今日上班日常查看Tomcat的日志时发现日志报错：
java.io.IOException: Too many open files
        at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) ~[na:1.7.0_09-icedtea]
        at sun.nio.ch.ServerSocketChannel...]]></description><category></category></item></channel></rss>