JSTL forEach的问题，从arrayList进行迭代 [英] issue of JSTL forEach iterate from arrayList

问题描述

在我的代码中，我使用了ArrayList，它在数组列表的每个索引中存储数字格式，例如'$ 0.00到$ 1,000,000.00'.通过<c:forEach>标记在JSP中进行迭代时， 其值像

In my code, I have used ArrayList which stores the number format like '$0.00 to $1,000,000.00' in each index of array list. while iterate in JSP through <c:forEach> tag, its values are printing like

$ 0.00至$ 1作为第一个字符串，000作为第二个字符串，000.00作为第三字符串. 但它的打印内容必须为"$ 0.00至$ 1,000,000.00".

$0.00 to $1 as a first string, 000 as a second string and 000.00 as a thrid string. but it has to print like '$0.00 to $1,000,000.00'.

问题是什么?

预先感谢

推荐答案

您正在遍历array的元素，而不是遍历数组本身.因此，数组"$ 0.00到$ 1,000,000.00"的元素在逗号位置分割，您将获得如上所述的单个元素.

You are iterating over element of array, not over array itself. Thus the element of the array "$0.00 to $1,000,000.00" is split at comma positions and you get individual elements as you have described.

以下是一个示例:

<%@ page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
 java.util.ArrayList list = new java.util.ArrayList();
 list.add("$0.00 to $1,000,000.00");
 list.add("$1,000,000.00 to $1,000,000,000.00");
 request.setAttribute("list", list);
%>

<h1>Iterating over ArrayList</h1>
<ul>
 <c:forEach items="${list}" var="value">
  <li><c:out value="${value}"/></li>
 </c:forEach>
</ul>

<h1>Iterating over first element of ArrayList</h1>
<ul>
 <c:forEach items="${list[0]}" var="value">
  <li><c:out value="${value}"/></li>
 </c:forEach>
</ul>

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