用NodeList和DocumentBuilder解析Xml [英] parsing Xml with NodeList and DocumentBuilder

问题描述

使用dom和DocumentBuilder解析xml有点麻烦。我可以让它工作，但我想我有点困惑与所有的子节点等。

这是我正在使用的XML： / p>

 <？xml version =1.0encoding =utf-8？> 
< LabTests> 
< LabTest type =specialtyname =Anti-FXa activityid =antiFXaorder =16> 
< values unit =U / mLdefault =N / A> 
< value type =increaseval =0> 
<条件> 
< condition>肝素效应< / condition> 
< / conditions> 
< / value> 
< value type =normalval => 
< conditions>< / conditions> 
< / value> 
< value type =reducedval => 
< conditions>< / conditions> 
< / value> 
< / values> 
< / LabTest> 
< LabTest type =generalname =aPTTid =aPTTorder => 
< values unit =secsdefault =N / A> 
< value type =increaseval => 
<条件> 
< condition>获得性血友病< / condition> 
< condition>获取vWD< / condition> 
< condition> DIC< / condition> 
<条件>血液纤维蛋白原血症< /条件> 
< condition> FI deficiency< / condition> 
< condition> FII缺陷< / condition> 
<条件> FII / IIa抑制剂< / condition> 
< condition> FIX缺陷< / condition> 
<条件> FIX抑制剂< / condition> 
<条件> FV缺陷< / condition> 
<条件> FV抑制剂< / condition> 
<条件> FVIII缺陷< / condition> 
< condition> FX缺陷< / condition> 
< condition> FX抑制剂< / condition> 
< condition> FXI缺陷< / condition> 
< condition> FXI抑制剂< / condition> 
<条件> FXII缺陷< / condition> 
<条件> FXII抑制剂< / condition> 
< condition>肝素效应< / condition> 
< condition>肝病效应< / condition> 
<条件>狼疮抗凝剂< / condition> 
<条件>单克隆丙种球蛋白病< /条件> 
< condition>维生素K缺乏< / condition> 
< condition> vWD type 1< / condition> 
< condition> vWD type 2< / condition> 
< condition> vWD类型3< / condition> 
< condition>华法林效果< / condition> 
< / conditions> 
< / value> 
< value type =normalval => 
<条件> 
< condition> DIC< / condition> 
<条件>血液纤维蛋白原血症< /条件> 
<条件> FVII缺陷< / condition> 
<条件> FXIII缺陷< / condition> 
<条件> FVII抑制剂< / condition> 
< condition>肝病效应< / condition> 
<条件>狼疮抗凝剂< / condition> 
<条件>单克隆丙种球蛋白病< /条件> 
< condition>维生素K缺乏< / condition> 
< condition> vWD type 1< / condition> 
< condition> vWD type 2< / condition> 
< condition> vWD类型3< / condition> 
< condition>华法林效果< / condition> 
< / conditions> 
< / value> 
< value type =reducedval => 
<条件> 
< condition> DIC< / condition> 
< / conditions> 
< / value> 
< / values> 
< / LabTest> 
< / LabTests> 
  

我想要做的是抓住每个 LabTest 元素，并且在每个元素中，抓住值元素（并获取类型的值），并且在值元素内，抓住所有条件元素。

最后，我想要一个类似于 Map< String，HashMap< String，ArrayList< String>> ，其中 String 是 LabTest 名称和 HashMap 使用类型（例如减少，增加等），然后填充ArrayList与值类型的条件。

令人困惑？

基本上，我只需要一个例子，我想，如何循环遍历并使用其值元素抓取每个LabTest，并且每个条件元素在这些价值元素之下。

解决方案

应该按照你所描述的方式工作：

  DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance（）; 
 DocumentBuilder builder = factory.newDocumentBuilder（）; 
 
文档doc = builder.parse（input.xml）; 
 
 NodeList labTestList = doc.getElementsByTagName（LabTest）; （int i = 0; i< labTestList.getLength（）; ++ i）
 {
元素labTest =（Element）labTestList.item（i）; 
 
 String labTestType = labTest.getAttribute（type）; 
 
 NodeList valueList = labTest.getElementsByTagName（value）; （int j = 0; j< valueList.getLength（）; ++ j）
 {
元素值=（Element）valueList.item（j）; 
 
 String valueType = value.getAttribute（type）; 
 
 NodeList conditionList = value.getElementsByTagName（condition）; （int k = 0; k< conditionList.getLength（）; ++ k）
 {
元素条件=（元素）conditionList.item（k）; 
 String conditionText = condition.getFirstChild（）。getNodeValue（）; 
} 
} 
} 
  

Having a bit of trouble parsing xml with dom and DocumentBuilder. I'm able to get it working, but I guess I get a bit confused with all the child nodes, etc.

Here's the XML I'm working with:

<?xml version="1.0" encoding="utf-8"?>
<LabTests>
    <LabTest type="specialty" name="Anti-FXa activity" id="antiFXa" order="16">
        <values unit="U/mL" default="N/A">
            <value type="increased" val="0">
                <conditions>
                    <condition>Heparin effect</condition>
                </conditions>
            </value>
            <value type="normal" val="">
                <conditions></conditions>
            </value>
            <value type="decreased" val="">
                <conditions></conditions>
            </value>
        </values>
    </LabTest>
    <LabTest type="general" name="aPTT" id="aPTT" order="">
        <values unit="secs" default="N/A">
            <value type="increased" val="">
                <conditions>
                    <condition>Acquired hemophilia</condition>
                    <condition>Acquired vWD</condition>
                    <condition>DIC</condition>
                    <condition>Dysfibrinogenemia</condition>
                    <condition>FI deficiency</condition>
                    <condition>FII deficiency</condition>
                    <condition>FII/IIa inhibitors</condition>
                    <condition>FIX deficiency</condition>
                    <condition>FIX inhibitors</condition>
                    <condition>FV deficiency</condition>
                    <condition>FV inhibitors</condition>
                    <condition>FVIII deficiency</condition>
                    <condition>FX deficiency</condition>
                    <condition>FX inhibitors</condition>
                    <condition>FXI deficiency</condition>
                    <condition>FXI inhibitors</condition>
                    <condition>FXII deficiency</condition>
                    <condition>FXII inhibitors</condition>
                    <condition>Heparin effect</condition>
                    <condition>Liver disease effect</condition>
                    <condition>Lupus anticoagulant</condition>
                    <condition>Monoclonal gammopathy</condition>
                    <condition>Vitamin K deficiency</condition>
                    <condition>vWD type 1</condition>
                    <condition>vWD type 2</condition>
                    <condition>vWD type 3</condition>
                    <condition>Warfarin effect</condition>
                </conditions>
            </value>
            <value type="normal" val="">
                <conditions>
                    <condition>DIC</condition>
                    <condition>Dysfibrinogenemia</condition>
                    <condition>FVII deficiency</condition>
                    <condition>FXIII deficiency</condition>
                    <condition>FVII inhibitors</condition>
                    <condition>Liver disease effect</condition>
                    <condition>Lupus anticoagulant</condition>
                    <condition>Monoclonal gammopathy</condition>
                    <condition>Vitamin K deficiency</condition>
                    <condition>vWD type 1</condition>
                    <condition>vWD type 2</condition>
                    <condition>vWD type 3</condition>
                    <condition>Warfarin effect</condition>
                </conditions>
            </value>
            <value type="decreased" val="">
                <conditions>
                    <condition>DIC</condition>
                </conditions>
            </value>
        </values>
    </LabTest>
</LabTests>

what I'm trying to do is grab hold of each LabTest element and, within each of those elements, grab hold of the value elements (and grab the value of type) and, within the value element, grab hold of all of the condition elements.

In the end, I want something like a Map<String, HashMap<String, ArrayList<String>>, where the String is the LabTest name and the HashMap uses the type (e.g. decreased, increased, etc) for the key and then fills up the ArrayList with the conditions for that value type.

Confusing enough?

Basically, I just need an example, I think, of how to loop through and grab each LabTest with its "value" elements, and each of the "condition" elements under those "value" elements.

解决方案

That should work as you described:

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();

Document doc = builder.parse("input.xml");

NodeList labTestList = doc.getElementsByTagName("LabTest");
for (int i = 0; i < labTestList.getLength(); ++i)
{
    Element labTest = (Element) labTestList.item(i);
    String labTestType = labTest.getAttribute("type");

    NodeList valueList = labTest.getElementsByTagName("value");
    for (int j = 0; j < valueList.getLength(); ++j)
    {
        Element value = (Element) valueList.item(j);
        String valueType = value.getAttribute("type");

        NodeList conditionList = value.getElementsByTagName("condition");
        for (int k = 0; k < conditionList.getLength(); ++k)
        {
            Element condition = (Element) conditionList.item(k);
            String conditionText = condition.getFirstChild().getNodeValue();
        }
    }
}

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