DOM4J:检索按属性值过滤的节点的值 [英] DOM4J: retrieve value of a node filtering by attribute value

问题描述

我有一个给定的xml，其结构如下:

I have a given xml structured like this:

<elem>
     <val id="1">aaa</val>
     <val id="2">bbb</val>
</elem>

使用SAXReader(DOM4J)，如何获取ID = 1(示例中为'aaa')的节点中包含的值?

With SAXReader (DOM4J), how can I get the value contained into the node with id = 1 ('aaa' in the example)?

我已经尝试过了:

String value = elem.element("val[@id='1']")

其中elem是正确的"path.current"，但是它没有用.

where elem is the right "path.current", but it didn't work.

可能我用错误的语法写了条件..建议?

Probably I'm writing the condition with a wrong syntax.. suggestions?

推荐答案

xpath语法看起来不错，但是您应该改用selectSingleNode方法.

The xpath syntax looks fine, but you should use the selectSingleNode method instead.

Node value = elem.selectSingleNode("val[@id='1']/text()");

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