（一）js在thymeleaf H5模板中获取ModelMap
controller层
public String edit(@PathVariable("id") Long id, ModelMap mmap)
{
//存入id值
mmap.put("goodsid", id);
return prefix + "/edit";
}
js中获取
<script th:inline="javascript">
var goodsid= [[${goodsid}]];
</script>
（二）js在jsp中获取获取ModelMap
<script>
var goodsid='<%=request.getAttribute("goodsid")%>';
</script>
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