標籤：value www 長度 運算式 擷取值 utf-8 body lan 通過
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>練習</title></head><body><h3>假設值棧中已經存入值，我們在jsp頁面擷取值棧中的值</h3><!-- 先引入Struts2架構為我們提供1的標籤庫,s標籤 --><!-- 這個標籤預設的情況下，就是從值棧中擷取值。 value中間編寫的是ognl運算式 如果我們在這樣寫username,表示從值棧中找屬性對應的值 如果我們這樣寫value="‘username‘"相當於輸出常量的字串,頁面顯示username value="‘username‘.length()"相當於調用方法,字串的長度 --> <s:property value="username"/><br/><s:property value="‘username‘"/><br/><s:property value="‘username‘.length()"/><br/></body></html>
jsp頁面通過使用s標籤擷取值棧中的值（初識）
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