https://blog.youkuaiyun.com/longG_yangzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/longG_yang/article/details/9121567https://blog.youkuaiyun.com/longG_yang/article/details/9121567longG_yangTue, 18 Jun 2013 16:19:27 +0800https://blog.youkuaiyun.com/longG_yang/article/details/6741361https://blog.youkuaiyun.com/longG_yang/article/details/6741361longG_yangFri, 02 Sep 2011 00:18:06 +0800https://blog.youkuaiyun.com/longG_yang/article/details/6119576https://blog.youkuaiyun.com/longG_yang/article/details/6119576longG_yangThu, 06 Jan 2011 10:25:00 +0800版本：10.2
默认oracleXE 启动OracleXETNSListener和OracleServiceXE两个服务。 一次管理员修改我的域名称和计算机名称。结果导致OracleXETNSListener无法启动。
最好的解决方法：
修改：

%Oracle_Home%/app/oracle/product/10.2.0/server/NETWORK/ADMIN 下
listener.ora
tnsnames.orahttps://blog.youkuaiyun.com/longG_yang/article/details/6118059https://blog.youkuaiyun.com/longG_yang/article/details/6118059longG_yangWed, 05 Jan 2011 15:20:00 +0800一.spring 配置方式



   class="com.context.JndiDataSource" ]]>https://blog.youkuaiyun.com/longG_yang/article/details/5889767https://blog.youkuaiyun.com/longG_yang/article/details/5889767longG_yangFri, 17 Sep 2010 00:55:00 +0800用了一下checkgroup控件，感觉还是挺方便：
1.实现全选和全部取消：要在checkgroup控件中加入子控件CheckGroupSelector（它也是一个checkbox）,然后就是通过子控件ListView或DataView遍历增加check控件,渲染成一个checkbox组的形式。
2.获取选中checkbox值：选中的checkbox值保存在checkgroup控件的Model对象中,并返回是一个List的数据结构。
3.默认选中checkgroup]]>https://blog.youkuaiyun.com/longG_yang/article/details/5889752https://blog.youkuaiyun.com/longG_yang/article/details/5889752longG_yangFri, 17 Sep 2010 00:35:00 +0800今天遇到hibernate 时间比较问题：
1.由数据库中的时间字段获得该时间与当前时间相差天数【表中的时间字段实际为8个字符存放的日期，形如yyyyMMdd】
select sysdate-to_date(timecolumn,'yyyyMMdd') from table
问题解决了！
 
2.关键就是利用了Oracle关键字sysdate和to_date函数实现与系统时间比较。]]>https://blog.youkuaiyun.com/longG_yang/article/details/5836188https://blog.youkuaiyun.com/longG_yang/article/details/5836188longG_yangWed, 25 Aug 2010 00:06:00 +0800Quartz是一个纯 Java 实现的作业调度工具,其中Spring也整合了 Quartz.
关于Quartz动态的添加任务：
1.配置Scheduler ：
获得默认的Scheduler实例
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
 
为MyJob.class创建一个JobDetail
JobDetail job=  new JobDe]]>https://blog.youkuaiyun.com/longG_yang/article/details/5808275https://blog.youkuaiyun.com/longG_yang/article/details/5808275longG_yangFri, 13 Aug 2010 00:17:00 +0800关于日期验证wicket有内部的验证机制会把验证信息存入FeedbackPanel控件
一.submit时直接通过FeedbackPanel控件将验证信息显示页面上
 
二.直接取控件的验证信息：TextField name = (TextField) this.get("wk_name");String verification   =name.getFeedbackMessage().getMessage();
 
三.直接取控件]]>https://blog.youkuaiyun.com/longG_yang/article/details/5714896https://blog.youkuaiyun.com/longG_yang/article/details/5714896longG_yangMon, 05 Jul 2010 23:56:00 +08001.定义Date date = new Date();
2.DateTextField dateField = new DateTextField("wk_date", new PropertyModel(this, "date"), new StyleDateConverter("M-", true));
注：wk_date为wicket控件id
     "S-":控件显示为yy-m-d
     "M-":控件显示为yyyy-m-d
   ]]>https://blog.youkuaiyun.com/longG_yang/article/details/5712589https://blog.youkuaiyun.com/longG_yang/article/details/5712589longG_yangSun, 04 Jul 2010 22:55:00 +0800 
SQL中的单记录函数
1.ASCII
返回与指定的字符对应的十进制数;
SQL> select ascii('A') A,ascii('a') a,ascii('0') zero,ascii(' ') space from dual;
        A         A      ZERO     SPACE
--------- --------- --------- ---------
       65    ]]>https://blog.youkuaiyun.com/longG_yang/article/details/5712461https://blog.youkuaiyun.com/longG_yang/article/details/5712461longG_yangSun, 04 Jul 2010 21:19:00 +0800一.Oracle补足函数lpad(oldstring,length,addsring)和rpad(oldstring,length,addsring)
    1.lpad(oldstring,length,addsring):oldstring不足length长度从左边开始以addstring补足。
    2.rpad(oldstring,length,addsring):oldstring不足length长度从右边开始以addstring补足。
 
]]>https://blog.youkuaiyun.com/longG_yang/article/details/5705795https://blog.youkuaiyun.com/longG_yang/article/details/5705795longG_yangWed, 30 Jun 2010 23:38:00 +0800https://blog.youkuaiyun.com/longG_yang/article/details/5321792https://blog.youkuaiyun.com/longG_yang/article/details/5321792longG_yangWed, 24 Feb 2010 11:00:00 +08000)]]>https://blog.youkuaiyun.com/longG_yang/article/details/5256135https://blog.youkuaiyun.com/longG_yang/article/details/5256135longG_yangMon, 25 Jan 2010 23:36:00 +0800https://blog.youkuaiyun.com/longG_yang/article/details/5210340https://blog.youkuaiyun.com/longG_yang/article/details/5210340longG_yangTue, 19 Jan 2010 00:16:00 +0800https://blog.youkuaiyun.com/longG_yang/article/details/5132555https://blog.youkuaiyun.com/longG_yang/article/details/5132555longG_yangTue, 05 Jan 2010 00:03:00 +0800https://blog.youkuaiyun.com/longG_yang/article/details/5066309https://blog.youkuaiyun.com/longG_yang/article/details/5066309longG_yangThu, 24 Dec 2009 00:23:00 +0800https://blog.youkuaiyun.com/longG_yang/article/details/5066262https://blog.youkuaiyun.com/longG_yang/article/details/5066262longG_yangThu, 24 Dec 2009 00:13:00 +0800https://blog.youkuaiyun.com/longG_yang/article/details/5058484https://blog.youkuaiyun.com/longG_yang/article/details/5058484longG_yangTue, 22 Dec 2009 23:00:00 +0800https://blog.youkuaiyun.com/longG_yang/article/details/4138223https://blog.youkuaiyun.com/longG_yang/article/details/4138223longG_yangWed, 29 Apr 2009 23:56:00 +0800