職責鏈(Chain of Responsibility)模式
posted @ 2011-11-08 20:53 風清揚 閱讀(279) | 評論 (0) | 編輯 收藏
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職責鏈(Chain of Responsibility)模式
摘要: 一、 職責鏈(Chain of Responsibility)模式 責任鏈模式是一種對象的行為模式【GOF95】。在責任鏈模式里,很多對象由每一個對象對其下家的引用而連接起來形成一條鏈。請求在這個鏈上傳遞, 直到鏈上的某一個對象決定處理此請求。發(fā)出這個請求的客戶端并不知道鏈上的哪一個對象最終處理這個請求,這使得系統(tǒng)可以在不影響客戶端的情況下動態(tài)地重新 組織鏈和分配責任。 從擊鼓傳花談起 ... 閱讀全文
posted @ 2011-11-08 20:53 風清揚 閱讀(279) | 評論 (0) | 編輯 收藏 eclipse中修改java和jsp字體及大小
1.更改java文件大小設(shè)置
Window->preferences->General->Appearance->Colors and Fonts-> Java->Java Editor Text Font->右邊按鈕Change 英文版默認的是Courier New 常規(guī) 10 2.更改jsp文件大小設(shè)置 Window->preferences->General->Appearance->Colors and Fonts-> Basic->TextFont->右邊按鈕Change posted @ 2011-11-05 10:07 風清揚 閱讀(7927) | 評論 (1) | 編輯 收藏 常用js正則表達式intege:"^-?[1-9]\\d*$", //整數(shù)
intege1:"^[1-9]\\d*$", //正整數(shù) intege2:"^-[1-9]\\d*$", //負整數(shù) num:"^([+-]?)\\d*\\.?\\d+$", //數(shù)字 num1:"^(([0-9]+.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*.[0-9]+)|([0-9]*[1-9][0-9]*))$",//正數(shù)(包括浮點和整數(shù)) num2:"^-[1-9]\\d*|0$", //負數(shù)(負整數(shù) + 0) decmal:"^([+-]?)\\d*\\.\\d+$", //浮點數(shù) decmal1:"^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*$", //正浮點數(shù) decmal2:"^-([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*)$", //負浮點數(shù) decmal3:"^-?([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*|0?.0+|0)$", //浮點數(shù) decmal4:"^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*|0?.0+|0$", //非負浮點數(shù)(正浮點數(shù) + 0) decmal5:"^(-([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*))|0?.0+|0$", //非正浮點數(shù)(負浮點數(shù) + 0) email:"^\\w+((-\\w+)|(\\.\\w+))*\\@[A-Za-z0-9]+((\\.|-)[A-Za-z0-9]+)*\\.[A-Za-z0-9]+$", //郵件 color:"^[a-fA-F0-9]{6}$", //顏色 url:"^http[s]?:\\/\\/([\\w-]+\\.)+[\\w-]+([\\w-./?%&=]*)?$", //url chinese:"^[\\u4E00-\\u9FA5\\uF900-\\uFA2D]+$", //僅中文 ascii:"^[\\x00-\\xFF]+$", //僅ACSII字符 zipcode:"^\\d{6}$", //郵編 mobile:"^(13|15|18)[0-9]{9}$", //手機 ip4:"^(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)$", //ip地址 notempty:"^\\S+$", //非空 picture:"(.*)\\.(jpg|bmp|gif|ico|pcx|jpeg|tif|png|raw|tga)$", //圖片 rar:"(.*)\\.(rar|zip|7zip|tgz)$", //壓縮文件 date:"^\\d{4}(\\-|\\/|\.)\\d{1,2}\\1\\d{1,2}$", //日期 time:"^([0-1]\\d|2[0-3]):[0-5]\\d:[0-5]\\d$", //時間 qq:"^[1-9]*[1-9][0-9]*$", //QQ號碼 tel:"^(([0\\+]\\d{2,3}-)?(0\\d{2,3})-)?(\\d{7,8})(-(\\d{3,}))?$", //電話號碼的函數(shù)(包括驗證國內(nèi)區(qū)號,國際區(qū)號,分機號) username:"^\\w+$", //用來用戶注冊。匹配由數(shù)字、26個英文字母或者下劃線組成的字符串 letter:"^[A-Za-z]+$", //字母 letter_u:"^[A-Z]+$", //大寫字母 letter_l:"^[a-z]+$", //小寫字母 idcard:"^[1-9]([0-9]{14}|[0-9]{17})$" //身份證 posted @ 2011-10-29 19:15 風清揚 閱讀(316) | 評論 (0) | 編輯 收藏 Access restriction: The type BASE64Encoder is not accessible due to restrict在Eclipse中編寫Java代碼時,用到了BASE64Decoder,import sun.misc.BASE64Decoder;可是Eclipse提示:
Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:\Program files\java\jre6\lib\rt.jar Access restriction : The constructor BASE64Decoder() is not accessible due to restriction on required library C:\Program files\java\jre6\lib\rt.jar 搞不懂是為什么,最后在http://forums.dzone.com/eclipse/384-access-restriction- problems.html找到答案,只需要在project build path中先移除JRE System Library,再添加庫JRE System Library,重新編譯后就一切正常了。但是我仍然很疑惑是為什么。。。 原文見:http://zhoushuyan.cn/java/the-type-base64decoder-is-not-accessible-due-to-restriction-on-required-library/ ------------------------------ Windows -> Preferences -> Java -> Compiler -> Errors/Warnings -> Deprecated and trstricted API -> Forbidden reference (access rules): -> change to warning 轉(zhuǎn)自: http://palwang.iteye.com/blog/906425 posted @ 2011-10-26 22:29 風清揚 閱讀(29241) | 評論 (11) | 編輯 收藏 SmartClient中Criteria 和 AdvancedCriteria的理解
時間不早了,就少寫一些了。
Criteria for selecting only a matching set of records from a DataSource. Criteria can be applied on the client and server. Unless configured otherwise, criteria will generally be applied client-side by ResultSets via ResultSet.applyFilter(). Client- and server-side systems built into SmartClient understand two criteria formats by default: simple key-value pairs (Criteria) or the AdvancedCriteria format. Simple key-value Criteria are represented via a JavaScript Object where each property specifies the name and required value for a field. Multiple legal values for a field can be provided as an Array. For example: var criteria = { field1 : "value1", field2 : ["value2", "value3"] } Would select all records where field1 has value "value1" and where field2 has either "value2" or "value3". When writing custom client and server-side filtering logic, criteria must be a JavaScript Object but the properties of that Object can contain whatever data you want. Whensent to the SmartClient server, the Java representation of the criteria is described here. When sent to other servers, the operationBinding.dataProtocol affects the format. 格式相當簡單。注意前面字段field1,是不需要將引號的. AdvancedCriteria is a format for representing search criteria which may include operators on field values such as "less than", or may include sub-clauses such as several criteria applied to fields joined by an "OR" operator. SmartClient DataSources can use AdvancedCriteria to search a list of Records, and the SmartClient Java Server can translate AdvancedCriteria to either SQL or Hibernate queries (Note: The server-side AdvancedCriteria handling feature is only available with the Power and Enterprise Editions of SmartClient; the Pro Edition is limited to ordinary criteria handling on the server side).可惜Power版和Enterprise版都老貴老貴的,企業(yè)版的都有按CPU賣的了,暈倒。 If the entire dataset is cached locally, SmartClient can perform AdvancedCriteria filtering on the client, avoiding a server call. An AdvancedCriteria is an ordinary JavaScript object which can be created directly with JavaScript literal notation. For example: An AdvancedCriteria is in effect a Criterion that has been marked with _constructor:"AdvancedCriteria" to mark it as complete criteria. posted @ 2011-10-24 23:08 風清揚 閱讀(387) | 評論 (0) | 編輯 收藏 |
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