<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[dokia123的专栏]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/dokia123</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; dokia123]]></copyright><item><title><![CDATA[hibernate 1+N问题]]></title><link>https://blog.youkuaiyun.com/dokia123/article/details/7062088</link><guid>https://blog.youkuaiyun.com/dokia123/article/details/7062088</guid><author>dokia123</author><pubDate>Sun, 11 Dec 2011 23:01:11 +0800</pubDate><description><![CDATA[hibernate 映射Manytoone关系时，会产生1+N问题，优化方式1：把many一端的fetchType设为Lazy。2：进行表连接查询，如：from User u left join fetch  u.group g;]]></description><category></category></item><item><title><![CDATA[hibernate与ehcache兼容问题]]></title><link>https://blog.youkuaiyun.com/dokia123/article/details/7061815</link><guid>https://blog.youkuaiyun.com/dokia123/article/details/7061815</guid><author>dokia123</author><pubDate>Sun, 11 Dec 2011 21:04:40 +0800</pubDate><description><![CDATA[今天在测试hibernate二级缓存的时候，用的是ehcache策略，hibernate的版本是3.5.6，ehcache版本是1.5（该hibernate里自带的版本），commons-logging版本为1.1.1，测试中报错了，错误如下：java.lang.NoClassDefFoundError: edu/emory/mathcs/backport/java/util/concurrent]]></description><category></category></item><item><title><![CDATA[第一篇博文之mysql表表连接查询和行列置换问题]]></title><link>https://blog.youkuaiyun.com/dokia123/article/details/6653262</link><guid>https://blog.youkuaiyun.com/dokia123/article/details/6653262</guid><author>dokia123</author><pubDate>Tue, 02 Aug 2011 11:41:36 +0800</pubDate><description><![CDATA[刚毕业工作一个月，进了家小公司，在看公司的代码过程中经常看到一些N长的sql语句，瞪着看半天都看不懂，本来接触数据库就少，而且也几年没碰过了，于是乎，便上网查了查，原来是关于表表连接查询和行列置换的。

于是乎，便在csdn上发了个帖子求助。然后问题顺利解决，接下来简单总结一]]></description><category></category></item></channel></rss>