沼气池:提取节点名称 [英] Digester: Extracting node name

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问题描述

是否可以使用Apache沼气池提取节点名称?

Is it possible to extract the node name using apache digester?

所以,如果XML看起来像

So, if the xml looks like

   <furniture>
     <sofa>
       .....
     </sofa>
     <coffeeTable>
       .....
     </coffeeTable>
   </furniture>

是它可以提取节点名称沙发,coffeeTable?

is it possible to extract the node name "sofa", "coffeeTable"?

我知道这是可能使用XPath,但使用沼气池这可能吗?

I know it is possible using xpath but is it possible using digester?

干杯

推荐答案

(原来的答案)

创建一个沼气池的模式家具/ *用一个简单的规则,是以第二个参数每次调用开始方法,并坚持一个您选择的集合(名单让所有的人,一组只得到所有唯一的名称)。

Create a Digester for pattern "furniture/*" with a simple Rule that takes the second parameter to each call to the begin method and sticks it in a collection of your choice (a list to get all of them, a set to get only all unique names).

(编辑)

从头开始,它更复杂一些。

Scratch that, it's a bit more complicated.

本作品:

public class App 
{
    final static Rule printRule = new Rule() {
        public void begin(String namespace, String name,
                Attributes attributes) throws Exception {
            System.out.println(name);
        }
    }; 
    public static void main( String[] args ) throws IOException, SAXException
    {
        InputStream instr = App.class.getResourceAsStream("/sample.xml");
        Digester dig = new Digester();
        dig.setRules(new RulesBase(){
            public List<Rule> match(String namespaceURI, String pattern) {
                return Arrays.asList(printRule);
            }
        });
        dig.parse(instr);
    }
}

这个特殊的样本将打印所有元素名称包括根家具元素。我要把它留给你的匹配()方法调整您的需求。

This particular sample will print all element names including the root furniture element. I'll leave it to you to adjust the match() method to your needs.

这篇关于沼气池:提取节点名称的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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