java代码：
Map root = new HashMap(); root.put("user", "Big Joe"); Map latest = new HashMap(); latest.put("url", "products/greenmouse.html"); latest.put("name", "green mouse"); root.put("latestProduct", latest);
页面代码：
username:${user} <#list latestProduct?keys as color> ${latestProduct[color]} </#list>
简单的，想怎么写就怎么写
