如何从Dom4j Node.selectObject或Node.selectNodes获取字符串列表 [英] How to get a list of String from Dom4j Node.selectObject or Node.selectNodes

问题描述

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Dom4j Javadoc表单 Node.selectObject(String xpathExpression)表示:

The Dom4j javadoc form Node.selectObject(String xpathExpression) says the following:

...返回的对象可以是一个或多个Node实例的列表，也可以是标量对象，例如 String 或Number实例，具体取决于XPath表达式.

...The object returned can either be a List of one or more Node instances or a scalar object like a String or a Number instance depending on the XPath expression.

但是，当我尝试在此xml上获取String列表时:

However when I try to get a list of String on this piece of xml:

<root>
...
    <level1>
        <property>pro1</property>
        <property>pro1</property>
        <property>pro1</property>
    <level1>
...
</root>

具有以下代码:

List result = document.selectObject("/root/level1/property/text()")

我得到了 org.dom4j.tree.DefaultText 对象的列表.当然，我可以在列表上进行迭代，但是我想知道是否有一种获取String列表的方法.

I get a list of org.dom4j.tree.DefaultText objet. Of course I can iterate on the list but I yould like to know if there is a way to get a list of String.

推荐答案

来自 http://www.w3.org/TR/xpath/#section-简介

计算表达式以产生一个 对象，具有以下之一 四种基本类型:

An expression is evaluated to yield an object, which has one of the following four basic types:

• 节点集(无重复的无序节点集合)
• 布尔值(对或错)
• 数字(浮点数)
• 字符串(UCS字符序列)

• node-set (an unordered collection of nodes without duplicates)
• boolean (true or false)
• number (a floating-point number)
• string (a sequence of UCS characters)

因此，XPath 1.0中没有xs:string的序列

So, no sequence of xs:string in XPath 1.0

在XPath 2.0中，当然有一个序列数据类型...

In XPath 2.0 there is a sequence data type, of course...

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