groovy打印xml中元素的路径和值 [英] groovy Print path and value of elements in xml

问题描述

我有以下xml:

<list>         
<cars>   
<model>2012</model>
<make>GM</make>         
</cars>    
</list>

我想将这些值打印为path:value，如下所示.

I want to print these values as path:value as shown below.

list/cars/model : 2012
list/cars/make : GM

我该如何实现?我尝试了name()方法，但它仅打印子项的名称.我想将整个路径打印到元素.

How can I achieve this? I tried the name() method but it only prints the name of child item. I want to print the whole path till the element.

我只能使用xmlSlurper解析器来做到这一点.

I can only use xmlSlurper parser to do this.

谢谢.

推荐答案

def xml = '''
<list>         
    <cars>   
        <model>2012</model>
        <make>GM</make>
        <color>Gold</color>
    </cars>    
</list>
'''

def item = new XmlSlurper().parseText(xml)

item.'**'.inject([]) { acc, val ->
    def localText = val.localText()
    acc << val.name()

    if( localText ) {
        println "${acc.join('/')} : ${localText.join(',')}"
        acc = acc.dropRight(1) // or acc = acc[0..-2]
    } 
    acc
}

这将按要求打印.上面是在树上使用depthFirst()搜索并使用inject(只是不突变其他列表)并查找 localText() ，指示叶节点的值，然后打印路径和值.该路径已累积在用于注入的列表中.简单的join()将提供所需的格式.

This would print as required. Above is using a depthFirst() search on the tree and using inject (just not to mutate any other list) and looks for localText(). If localText() is encountered indicating the value of the leaf node, then print the path and the value. The path has been accumulated in a list which was used in inject. A simple join() would give the required format.

Above已在Groovy 2.4.5中成功测试.如果localText()在NodeChild中不可用，则可能是Groovy的版本早于2.3.0的原因，因为该方法自2.3.0起已添加

Above has been tested successfully in Groovy 2.4.5. If localText() is not available in NodeChild then a version of Groovy older than 2.3.0 would be reason because that method has been added since 2.3.0

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