https://blog.youkuaiyun.com/eagullxzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/eagullx/article/details/6578025https://blog.youkuaiyun.com/eagullx/article/details/6578025eagullxThu, 30 Jun 2011 20:19:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/6578016https://blog.youkuaiyun.com/eagullx/article/details/6578016eagullxThu, 30 Jun 2011 20:12:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/6461182https://blog.youkuaiyun.com/eagullx/article/details/6461182eagullxThu, 02 Jun 2011 14:01:00 +0800MVC模式是"Model-View-Controller" 的缩写，中文翻译为" 模式- 视图- 控制器" 。MVC 应用程序总是由这三个部分组成。Event( 事件) 导致Controller 改变Model 或View ，或者同时改变两者。只要Controller 改变了Models 的数据或者属性，所有依赖的View 都会自动更新。类似的，只要Controller 改变了View ，View 会从潜在的Model 中获取数据来刷新自己。MVC 模式最早]]>https://blog.youkuaiyun.com/eagullx/article/details/6460962https://blog.youkuaiyun.com/eagullx/article/details/6460962eagullxThu, 02 Jun 2011 11:40:00 +08001. Servlet过滤器基础 Servlet过滤器是Servlet的一种特殊用法，主要用来完成一些通用的操作。比如编码的过滤，判断用户的登陆状态等等。Servlet过滤器的适用场合： A．认证过滤 B．登录和审核过滤 C．图像转换过滤 D．数据压缩过滤 E．加密过滤 F．令牌过滤 G．资源访问触发事件过滤 Servlet过滤器接口的构成： 所有的Servlet过滤器类都必须实现javax.servlet.Filter接口。这个接口含有3个过滤器类必须实现]]>https://blog.youkuaiyun.com/eagullx/article/details/6460890https://blog.youkuaiyun.com/eagullx/article/details/6460890eagullxThu, 02 Jun 2011 11:08:00 +0800 Listener是Servlet的监听器，它可以监听客户端的请求、服务端的操作等。通过监听器，可以自动激发一些操作，比如监听在线的用户的数量。当 增加一个HttpSession时，就激发sessionCreated(HttpSessionEvent se)方法，这样就可以给在线人数加1。常用的监听接口有以下几个：
    ServletContextAttributeListener监听对ServletContext属性的操作，比如增加、删除、修改属性。
]]>https://blog.youkuaiyun.com/eagullx/article/details/6452168https://blog.youkuaiyun.com/eagullx/article/details/6452168eagullxSat, 28 May 2011 18:19:00 +0800http://hi.baidu.com/boywell/blog/item/a069bccbc45e7c4cf31fe758.html
来源：1，http://topic.youkuaiyun.com/u/20080929/02/4e0ef626-98ee-4d6d-96ed-fe40afe8290b.html
         2，http://topic.youkuaiyun.com/u/20080415/12/3f2b9589-e97c-4129-8941-011bd9203a98.html]]>https://blog.youkuaiyun.com/eagullx/article/details/6450883https://blog.youkuaiyun.com/eagullx/article/details/6450883eagullxFri, 27 May 2011 20:17:00 +0800即使你没有用过对象序列化（serialization），你可能也知道它。但你是否知道 Java 还支持另外一种形式的对象持久化，外部化（externalization）？
下面是序列化和外部化在代码级的关联方式：
public interface Serializable {}
public interface Externalizable extends Serializable {
  void readExternal(Object]]>https://blog.youkuaiyun.com/eagullx/article/details/6432968https://blog.youkuaiyun.com/eagullx/article/details/6432968eagullxThu, 19 May 2011 20:02:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/6432539https://blog.youkuaiyun.com/eagullx/article/details/6432539eagullxThu, 19 May 2011 16:47:00 +08001.struts2架构图：

 
  请求首先通过Filter chain，Filter主要包括ActionContextCleanUp，它主要清理当前线程的ActionContext和 Dispatcher；FilterDispatcher主要通过AcionMapper来决定需要调用哪个Action。
        ActionMapper取得了ActionMapping后，在Dispatcher的serviceAction方法里创建 ]]>https://blog.youkuaiyun.com/eagullx/article/details/6278042https://blog.youkuaiyun.com/eagullx/article/details/6278042eagullxFri, 25 Mar 2011 15:53:00 +0800错误如下：com.ibatis.sqlMap.client.SqlMapException:There is no statement named xxx in this SqlMap
原因如下:
1.在xxx.xml文件中有两个标签的id命名相同。
2.DAO实现类方法中没有写对应的xxx.xml的id的名称。
3.试题映射文件xxx.xml未加入到sqlMap-Config.xml文件中。]]>https://blog.youkuaiyun.com/eagullx/article/details/6066952https://blog.youkuaiyun.com/eagullx/article/details/6066952eagullxFri, 10 Dec 2010 09:33:00 +0800java运行过程如下图所示
 
 

 
java平台包括java　VM 和java API
 

 
What Can Java Technology Do?
 
Development Tools :The development tools provide everything you'll need for compiling, running, monitoring,]]>https://blog.youkuaiyun.com/eagullx/article/details/6066902https://blog.youkuaiyun.com/eagullx/article/details/6066902eagullxFri, 10 Dec 2010 09:04:00 +0800转自：http://hi.baidu.com/suny_duan/blog/item/074f9afb09f08c9b58ee901b.html
JVM(Java虚拟机)一种用于计算设备的规范，可用不同的方式（软件或硬件）加以实现。编译虚拟机的指令集与编译微处理器的指令集非常类似。Java虚拟机包括一套字节码指令集、一组寄存器、一个栈、一个垃圾回收堆和一个存储方法域。
       Java虚拟机(JVM)是可运行Java代码的假想计算机。只要根据JVM规格描述将解释器移植]]>https://blog.youkuaiyun.com/eagullx/article/details/5150505https://blog.youkuaiyun.com/eagullx/article/details/5150505eagullxThu, 07 Jan 2010 14:36:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/5150492https://blog.youkuaiyun.com/eagullx/article/details/5150492eagullxThu, 07 Jan 2010 14:35:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/5117023https://blog.youkuaiyun.com/eagullx/article/details/5117023eagullxFri, 01 Jan 2010 12:41:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/5096195https://blog.youkuaiyun.com/eagullx/article/details/5096195eagullxTue, 29 Dec 2009 09:06:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/5076319https://blog.youkuaiyun.com/eagullx/article/details/5076319eagullxFri, 25 Dec 2009 16:18:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/4516222https://blog.youkuaiyun.com/eagullx/article/details/4516222eagullxThu, 03 Sep 2009 17:04:00 +0800https://blog.youkuaiyun.com/eagullx/article/details/4515987https://blog.youkuaiyun.com/eagullx/article/details/4515987eagullxThu, 03 Sep 2009 16:25:00 +08002){ return fract]]>https://blog.youkuaiyun.com/eagullx/article/details/4515756https://blog.youkuaiyun.com/eagullx/article/details/4515756eagullxThu, 03 Sep 2009 15:46:00 +0800