我有一个示例XML文件,如下所示:
<?xml version="1.0"?>
<h:html xmlns="http://www.w3.org/2002/xforms" xmlns:ev="http://www.w3.org/2001/xml-events" xmlns:h="http://www.w3.org/1999/xhtml" xmlns:jr="http://openrosa.org/javarosa" xmlns:orx="http://openrosa.org/xforms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<h:head>
<h:title>tutorial</h:title>
<model>
<instance>
<tutorial id="tutorial">
<name/>
<age/>
<gender/>
<photo/>
<date/>
<location/>
<thanks/>
<start/>
<end/>
<today/>
<deviceid/>
<subscriberid/>
<simserial/>
<phonenumber/>
<meta>
<instanceID/>
</meta>
</tutorial>
</instance>
<bind nodeset="/tutorial/name" required="true()" type="string"/>
<bind constraint=". > 0 and . < 120" jr:constraintMsg="That's not a valid age!" nodeset="/tutorial/age" required="true()" type="int"/>
<bind nodeset="/tutorial/gender" type="select1"/>
<bind nodeset="/tutorial/photo" type="binary"/>
<bind nodeset="/tutorial/date" type="date"/>
<bind nodeset="/tutorial/location" type="geopoint"/>
<bind nodeset="/tutorial/thanks" readonly="true()" type="string"/>
<bind jr:preload="timestamp" jr:preloadParams="start" nodeset="/tutorial/start" type="dateTime"/>
<bind jr:preload="timestamp" jr:preloadParams="end" nodeset="/tutorial/end" type="dateTime"/>
<bind jr:preload="date" jr:preloadParams="today" nodeset="/tutorial/today" type="date"/>
<bind jr:preload="property" jr:preloadParams="deviceid" nodeset="/tutorial/deviceid" type="string"/>
<bind jr:preload="property" jr:preloadParams="subscriberid" nodeset="/tutorial/subscriberid" type="string"/>
<bind jr:preload="property" jr:preloadParams="deviceid" nodeset="/tutorial/simserial" type="string"/>
<bind jr:preload="property" jr:preloadParams="phonenumber" nodeset="/tutorial/phonenumber" type="string"/>
<bind calculate="concat('uuid:', uuid())" nodeset="/tutorial/meta/instanceID" readonly="true()" type="string"/>
</model>
</h:head>
<h:body>
<input ref="/tutorial/name">
<label>What's your name?</label>
</input>
<input ref="/tutorial/age">
<label>How old are you?</label>
</input>
<select1 ref="/tutorial/gender">
<label>Gender</label>
<item>
<label>Male</label>
<value>male</value>
</item>
<item>
<label>Female</label>
<value>female</value>
</item>
</select1>
<upload mediatype="image/*" ref="/tutorial/photo">
<label>Please Take a picture</label>
</upload>
<input ref="/tutorial/date">
<label>Date</label>
</input>
<input ref="/tutorial/location">
<label>Where are you?</label>
<hint>You need to be outside for your GPS to work.</hint>
</input>
<input ref="/tutorial/thanks">
<label>Thanks for your time <output value="/tutorial/name"/>!</label>
</input>
</h:body>
</h:html>
现在我想用<input ref="/tutorial/name">
填写来自网络服务的响应数据?我有一个正确提供响应的Web服务。请帮帮我......
答案 0 :(得分:5)
替换<input ref="/tutorial/name">
代码。你必须遵循这三个步骤。
1)在XML文件中查找<input ref="/tutorial/name">
TAG。
2)更新,删除,替换您想要的任何功能。
3)将内容写入XML文件
第1步:查找节点:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder db = factory.newDocumentBuilder();
Document dom = db.parse(FILE);
Element root = dom.getDocumentElement();
//get node-list,
NodeList inputNodeList = root.getElementsByTagName("input");
//iterate over all input node to find the desired one.
for(int i=0;i<inputNodeList.length();i++){
Node inputNode = inputNodeList.item(i); //get a single node.
String refStr = inputNode.getAttributes().getNamedItem("ref").getNodeValue();
if(refStr.compareTo("/tutorial/name")==0){
// Bingo, You have find the NODE. Now you can do any operations like delete, edit whatever you want.
}
}
第2步:执行替换操作。
您可以使用。
删除节点inputNode.getParentNode().removeChild(inputNode);
如果要替换节点,请查看replaceChild()方法。
基本理念是,
有关replaceChild()方法的示例,您可以参考this link。 这是一个使用DOM解析器修改XML文件的好教程 - TUTORIAL。
第3步:将内容写入XML文件。
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(selectedFile);
transformer.transform(source, result);
希望,这会给你一些关于实现你想要的任务的暗示。
答案 1 :(得分:4)
我正在使用SAXParser来处理我的应用程序中的xml解析。
try {
/**
* Create a new instance of the SAX parser
**/
SAXParserFactory saxPF = SAXParserFactory.newInstance();
SAXParser saxP = saxPF.newSAXParser();
XMLReader xmlR = saxP.getXMLReader();
URL url = new URL("http:Your URL"); // URL of the XML
XMLHandler myXMLHandler = new XMLHandler();
xmlR.setContentHandler(myXMLHandler);
xmlR.parse(new InputSource(url.openStream()));
} catch (Exception e) {
e.printStackTrace();
}
这里有一个很好的教程:http://mobile.tutsplus.com/tutorials/android/android-sdk-build-a-simple-sax-parser/