本文執行個體講述了JSP中Regex用法。分享給大家供大家參考，具體如下：
<%@ page language="java" import="java.util.*,cn.com.Person,cn.com.Adddress" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'El.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <% String data="assd"; request.setAttribute("data", data); %> <!-- Regex，對於 Request傳過來的資料可以直接如下顯示 相當於：pageContext.findAttribute("data"); 這是一般的方式 --> ${data } <br/> <% Person p=new Person(); p.setName("name"); request.setAttribute("person", p); %> <!-- 反射name屬性擷取這個值輸出 資料通過JAVABean裡傳過來的如下： --> ${person.name} <br/> <% Person p2=new Person(); Adddress add=new Adddress(); add.setCity("NewYork"); p2.setAddress(add); request.setAttribute("p2", p2); %> <!-- 下面的是定義一個Person的類和一個Adddress的類 Person中私人屬性：private Adddress address; 要擷取他的地址可以如下的方式來完成 資料複雜的bean裡面帶過來的如下： --> ${p2.address.city} <br/> <% ArrayList list=new ArrayList(); list.add(new Person("wy")); list.add(new Person("wyy")); list.add(new Person("wyyy")); request.setAttribute("list", list); %> <!-- 集合帶過來的怎麼擷取資料呢？ --> ${list[1].name } <br/> <% Map map=new HashMap(); map.put("1", new Person("aaaa")); map.put("b", new Person("bbbb")); map.put("c", new Person("cccc")); map.put("d", new Person("dddd")); request.setAttribute("map", map); %> <!-- Map集合帶過來的怎麼擷取資料呢？ map集合的資料存放的時候id一般不要用數字:會出現500錯誤 但是用數位話擷取方式如第二條 .號取不出來就用中括弧[] --> ${map.b.name} ${map['1'].name } <br/> <!-- 擷取當前的web項目名 --> ${pageContext.request.contextPath} <a href="${pageContext.request.contextPath}/demo1.jsp" >點</a> </body></html>
PS：這裡再為大家提供2款非常方便的Regex工具供大家參考使用：
JavaScriptRegex線上測試載入器：
http://tools.jb51.net/regex/javascript
Regex線上產生工具：
http://tools.jb51.net/regex/create_reg
希望本文所述對大家JSP程式設計有所協助。
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