获取当前节点 xpath

本文介绍了获取当前节点 xpath的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要获取我为其编写了 xsl 函数的当前节点的 xpath

I need to get the xpath of current node for which i have written an xsl function

<func:function name="fn:getXpath"> <xsl:variable name="xpath"> <xsl:for-each select="ancestor-or-self::*"> <xsl:value-of select="concat($xpath, name())" /> <xsl:if test="not(position()=last())"> <xsl:value-of select="concat('/', $xpath)" /> </xsl:if> </xsl:for-each> </xsl:variable> <func:result select="$xpath" /> </func:function>

但是当我运行这个时，我收到以下错误

But when I run this, I'm getting the following error

file:///D:/test.xsl; Line #165; Column #63; Variable accessed before it is bound! file:///D:/test.xsl; Line #165; Column #63; java.lang.NullPointerException

我使用的是 xalan 2.7.0.请帮忙.

I'm using xalan 2.7.0. Please help.

推荐答案

您在变量本身的定义中使用了变量 $xpath:

You are using the variable $xpath inside the definition of the variable itself:

<func:function name="fn:getXpath"> <xsl:variable name="xpath"> <xsl:for-each select="ancestor-or-self::*"> <xsl:value-of select="concat($xpath, name())" /> <------- <xsl:if test="not(position()=last())"> <xsl:value-of select="concat('/', $xpath)" /> <------- </xsl:if> </xsl:for-each> </xsl:variable> <func:result select="$xpath" /> </func:function>

此时变量未知.