如何在JspTags中访问请求？

Question

我想request.getContextPath()在扩展的JSP标记内部调用SimpleTagSupport,有什么方法可以做到吗？

Answer 1

首先得到PageContext由继承SimpleTagSupport#getJspContext(),然后获得HttpServletRequest通过PageContext#getRequest().

PageContext pageContext = (PageContext) getJspContext();  
HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();