JSPにてjava.util.Mapを扱う
code
---
<%@ page language="java" contentType="text/xml; charset=UTF-8" pageEncoding="UTF-8" autoFlush="true" buffer="8kb"
isErrorPage="false" isThreadSafe="true" session="true"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.addHeader("Cache-Control", "no-store");
response.setDateHeader("Expires", 0);
java.util.HashMap<String, String> map = new java.util.HashMap<String, String>();
map.put("a", "1");
map.put("b", "2");
map.put("c", "3");
map.keySet();
request.setAttribute("results", map);
%><?xml version="1.0" encoding="UTF-8" ?>
<results version="2.0">
<c:forEach var="map" items="${results}">
<data>
<c:out value="${map}" escapeXml="true" /></data>
</c:forEach> <c:forEach var="map" items="${results}">
<data>
<c:out value="${map.key}" escapeXml="true" /></data>
</c:forEach> <c:forEach var="map" items="${results}">
<data>
<c:out value="${map.value}" escapeXml="true" /></data>
</c:forEach> <c:forEach var="map" items="${results}">
<data <c:out value="${map.key}" escapeXml="true" />="<c:out value="${map.value}" escapeXml="true" />"></data>
</c:forEach>
</results>
---
結果
---
<?xml version="1.0" encoding="UTF-8"?>
<results version="2.0">
<data>a=1</data>
<data>b=2</data>
<data>c=3</data>
<data>a</data>
<data>b</data>
<data>c</data>
<data>1</data>
<data>2</data>
<data>3</data>
<data a="1"/>
<data b="2"/>
<data c="3"/>
</results>