Ruby 语言 思想驱动生活 http://liubin.nanshapo.com Ruby,Rails,编程是一种乐趣。 Tue, 31 Aug 2010 08:31:24 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 几个开源的在线考试系统 http://liubin.nanshapo.com/2010/08/31/some-open-source-online-testing-application/ http://liubin.nanshapo.com/2010/08/31/some-open-source-online-testing-application/#comments Tue, 31 Aug 2010 08:30:32 +0000 liubin http://liubin.nanshapo.com/?p=310 都是在sf上找到的。

1.TCExam agpl的许可证，麻烦。PHP/mysql的
功能一般，只是个考试系统，多语言支持。


地址：http://sourceforge.net/projects/tcexam/

2. eFront – Refreshing eLearning

看截图还不错，主页：http://sourceforge.net/projects/efrontlearning/

另一个主页：http://www.efrontlearning.net/



3. WEB-SET CAMPUS
http://sourceforge.net/projects/web-set-campus/



4. GARC – An eLearning System

http://sourceforge.net/projects/garc/



5. Testa OTMS

http://sourceforge.net/projects/testa-otms/

]]> http://liubin.nanshapo.com/2010/08/31/some-open-source-online-testing-application/feed/ 0 回龙观地区通讯地址 http://liubin.nanshapo.com/2010/08/04/%e5%9b%9e%e9%be%99%e8%a7%82%e5%9c%b0%e5%8c%ba%e9%80%9a%e8%ae%af%e5%9c%b0%e5%9d%80/ http://liubin.nanshapo.com/2010/08/04/%e5%9b%9e%e9%be%99%e8%a7%82%e5%9c%b0%e5%8c%ba%e9%80%9a%e8%ae%af%e5%9c%b0%e5%9d%80/#comments Wed, 04 Aug 2010 09:57:58 +0000 liubin http://liubin.nanshapo.com/?p=303 中文：北京市昌平区回龙观(文化居住区)AA苑（园）B区CC号楼DD单元EEE 邮政编码：102208
英文：Room DD-EEE,Bldg No.CC,Block B,AA, Huilongguan residential area,Changping District,Beijing 102208,PRC

]]> http://liubin.nanshapo.com/2010/08/04/%e5%9b%9e%e9%be%99%e8%a7%82%e5%9c%b0%e5%8c%ba%e9%80%9a%e8%ae%af%e5%9c%b0%e5%9d%80/feed/ 0 spring里的ModelAttribute http://liubin.nanshapo.com/2010/07/08/modelattribute-under-spring/ http://liubin.nanshapo.com/2010/07/08/modelattribute-under-spring/#comments Thu, 08 Jul 2010 07:42:32 +0000 liubin http://liubin.nanshapo.com/?p=306 在spring里，model和form的对应不需要写xml文件，只需要在页面里用form这个taglib就可以了：

email

这里的commandName就是和Controller里相互映射的model的名字（实例名）
path=email指定了对应对象的属性。

Controller里可以这样写：
protected ModelAndView sendInvite(@ModelAttribute(“invite”) Invite invite,
BindingResult result, SessionStatus status, ModelMap model) {}

其中，参数的第一个invite会自动从form里生成一个Invite的实例并设置值，Controller里直接使用这个对象就可以。

而加上@SessionAttributes的话，可以在form里一直显示上次输入的form内容，直到自己调用status.setComplete()为止，这个操作的意思就是一个form相关联的操作已经结束，从session里清空就可以了

]]> http://liubin.nanshapo.com/2010/07/08/modelattribute-under-spring/feed/ 0 svn不能提交的错误 http://liubin.nanshapo.com/2010/07/01/svn-cannot-commit-with-two-line-comments/ http://liubin.nanshapo.com/2010/07/01/svn-cannot-commit-with-two-line-comments/#comments Thu, 01 Jul 2010 08:25:58 +0000 liubin http://liubin.nanshapo.com/?p=304 Eclipse里提交代码的时候，提示：
org.tigris.subversion.javahl.ClientException: APR does not understand this error code
svn: Commit failed (details follow):
svn: Cannot accept non-LF line endings in ‘svn:log’ property

comment写了2行而已，查了下，网上有人说每行最后以空格结尾就行了，我试了下还是不行。

不要comment，提交成功。。。奇怪。

]]> http://liubin.nanshapo.com/2010/07/01/svn-cannot-commit-with-two-line-comments/feed/ 0 在spring中设置request的charset为utf-8 http://liubin.nanshapo.com/2010/07/01/set-request-chartset-to-utf8-unser-spring/ http://liubin.nanshapo.com/2010/07/01/set-request-chartset-to-utf8-unser-spring/#comments Thu, 01 Jul 2010 06:48:24 +0000 liubin http://liubin.nanshapo.com/?p=301 在java里可以用：request.setCharacterEncoding(“UTF-8″);

在Spring的Controller类里个别设置太麻烦，可以用filter

  1. <filter-name>Spring character encoding filter</filter-name>
  2.         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  3.         <init-param>
  4.             <param-name>encoding</param-name>
  5.             <param-value>utf-8</param-value>
  6.         </init-param>
  7.     </filter>
  8.     <filter-mapping>
  9.         <filter-name>Spring character encoding filter</filter-name>
  10.         <url-pattern>/*</url-pattern>
  11.     </filter-mapping>
]]> http://liubin.nanshapo.com/2010/07/01/set-request-chartset-to-utf8-unser-spring/feed/ 0 Android中一些关于sqlite的总结-1 http://liubin.nanshapo.com/2010/06/25/somthing-about-sqlite-in-android-1/ http://liubin.nanshapo.com/2010/06/25/somthing-about-sqlite-in-android-1/#comments Fri, 25 Jun 2010 09:57:10 +0000 liubin http://liubin.nanshapo.com/?p=296 1.数据库文件
位于：/data/data/{package} /databases文件夹中

2.SQLiteOpenHelper 的onCreate，onUpgrade
 你可以扩展SQLiteOpenHelper类，它是一个Android辅助类，主要用于数据库创建和版本管理。实际上，你可以覆盖onCreate()和onUpgrade()方法
onCreate在数据库第一次被创建的时候才会调用，不用担心每次都掉用。
因为很多例子都是create table的语句，重复调用显然原来的数据会没的。
而onUpgrade则是升级的时候才会调用，看如下代码：

  1. @Override
  2.         public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
  3.             Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
  4.                     + newVersion + ", which will destroy all old data");
  5.             db.execSQL("DROP TABLE IF EXISTS test");
  6.             onCreate(db);
  7.         }
]]> http://liubin.nanshapo.com/2010/06/25/somthing-about-sqlite-in-android-1/feed/ 0 hibernate3.2里的Transformers http://liubin.nanshapo.com/2010/06/24/transformers-in-hibernate3-2/ http://liubin.nanshapo.com/2010/06/24/transformers-in-hibernate3-2/#comments Thu, 24 Jun 2010 08:34:45 +0000 liubin http://liubin.nanshapo.com/?p=292 hibernate 里想将sql的结果转为对象，但是对象不想再.hb.xml里定义，可以考虑用 ResultTransformer

使用SQL Transformers

  1. List resultWithAliasedBean = s.createSQLQuery(
  2.   "SELECT st.name as studentName, co.description as courseDescription " +
  3.   "FROM Enrolment e " +
  4.   "INNER JOIN Student st on e.studentId=st.studentId " +
  5.   "INNER JOIN Course co on e.courseCode=co.courseCode")
  6.   .addScalar("studentName")
  7.   .addScalar("courseDescription")
  8.   .setResultTransformer( Transformers.aliasToBean(StudentDTO.class))
  9.   .list();
  10.  
  11. StudentDTO dto =(StudentDTO) resultWithAliasedBean.get(0);

注意，如果不加上addScalar()调用的话，可能有些属性不会被设置值，因为他们可能是用大写字母返回的。

用Map

指定Transformers.ALIAS_TO_MAP就可以了，如下所示，你不必为了在需要记忆字段对应的位置，因为他们是map

  1. List iter = s.createQuery(
  2.   "select e.student.name as studentName," +
  3.   "       e.course.description as courseDescription" +
  4.   "from   Enrolment as e")
  5.   .setResultTransformer( Transformers.ALIAS_TO_MAP )
  6.   .iterate();
  7.  
  8. String name = (Map)(iter.next()).get("studentName");

原文：http://swik.net/Hibernate/Hibernate+GroupBlog/Hibernate+3.2:+Transformers+for+HQL+and+SQL/cmxs

]]> http://liubin.nanshapo.com/2010/06/24/transformers-in-hibernate3-2/feed/ 0 找不到org.slf4j.impl.StaticLoggerBinder http://liubin.nanshapo.com/2010/06/21/org-slf4j-impl-staticloggerbinder-not-found/ http://liubin.nanshapo.com/2010/06/21/org-slf4j-impl-staticloggerbinder-not-found/#comments Mon, 21 Jun 2010 07:57:02 +0000 liubin http://liubin.nanshapo.com/?p=290 启动tomcat出错：

  1. 严重: Servlet /AppStoreServer threw load() exception
  2. java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder
  3.     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516)
  4.     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1361)
  5.     at org.slf4j.LoggerFactory.getSingleton(LoggerFactory.java:223)
  6.     at org.slf4j.LoggerFactory.bind(LoggerFactory.java:120)
  7.     at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:111)
  8.     at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:269)
  9.     at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:242)
  10.     at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:255)

原来hibernate自带了个slf4j的东西，但是不带这个，还要另外下载。

]]> http://liubin.nanshapo.com/2010/06/21/org-slf4j-impl-staticloggerbinder-not-found/feed/ 0 hibernate的mappingResources和mappingDirectoryLocations http://liubin.nanshapo.com/2010/06/21/hibernate-mappingresources-mappingdirectorylocations/ http://liubin.nanshapo.com/2010/06/21/hibernate-mappingresources-mappingdirectorylocations/#comments Mon, 21 Jun 2010 07:23:53 +0000 liubin http://liubin.nanshapo.com/?p=286 如果嫌mappingResources的麻烦，可以用mappingDirectoryLocations

  1. <property name="mappingDirectoryLocations"> 
  2.        <list> 
  3.     <value>WEB-INF/rescources/com/abc</value> 
  4.        </list> 
  5. </property>
]]> http://liubin.nanshapo.com/2010/06/21/hibernate-mappingresources-mappingdirectorylocations/feed/ 0 hibernate-extensions和hiberanate版本的问题 http://liubin.nanshapo.com/2010/06/21/hibernate-extensions-under-hiberanate-3-5-5-final/ http://liubin.nanshapo.com/2010/06/21/hibernate-extensions-under-hiberanate-3-5-5-final/#comments Mon, 21 Jun 2010 05:30:28 +0000 liubin http://liubin.nanshapo.com/?p=282 想用hbm2java生成java代码，却出现错误：
Exception in thread “main” java.lang.NoClassDefFoundError: net/sf/hibernate/MappingException
Caused by: java.lang.ClassNotFoundException: net.sf.hibernate.MappingException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: net.sf.hibernate.tool.hbm2java.CodeGenerator. Program will exit.

查了一下，原来这个MappingException在最新的hibernate里面没有了（3.5.3Final），还要在老的版本里去找。
下了一个2.1.7c的就可以了

记得要在setenv.bat里加入一行：
set HIBERNATE_HOME=c:\hibernate-2.1

]]> http://liubin.nanshapo.com/2010/06/21/hibernate-extensions-under-hiberanate-3-5-5-final/feed/ 0