Java操作XML文件_JAVA_编程开发_程序员俱乐部

class="xml" name="code"><?xml version="1.0" encoding="UTF-8"?>
<root>
	<var>
		<name>logo_src</name>
		<value>images/logo.gif</value>
	</var>
		<var>
		<name>logo_src1</name>
		<value>images/logo.gif111</value>
	</var>
		<var>
		<name>logo_src2</name>
		<value>images/logo.gif222</value>
	</var>
		<var>
		<name>logo_src3</name>
		<value>images/logo.gif333</value>
	</var>
		<var>
		<name>logo_src4</name>
		<value>images/logo.gif444</value>
	</var>
</root>

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?读取XML文件的全部值

	private Vector readXMLFile(String file) throws Exception {//测试通过
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		DocumentBuilder builder = dbf.newDocumentBuilder();
		Document doc = builder.parse(file); // 获取到xml文件
		// 开始读取
		Element root = doc.getDocumentElement(); // 获取根元素
		NodeList vars = root.getElementsByTagName("var");
		info_Vector = new Vector();
		for (int i = 0; i < vars.getLength(); i++) {
			// 一次取得每一个元素
			info info = new info();
			Element element = (Element) vars.item(i);

			NodeList names = element.getElementsByTagName("name");
			Element element1 = (Element) names.item(0);
			Node node1 = element1.getFirstChild();
			info.setName(node1.getNodeValue());//取得name字段的值
			
			NodeList value = element.getElementsByTagName("value");
			Element element2 = (Element) value.item(0);
			Node node2 = element2.getFirstChild();
			info.setValue(node2.getNodeValue());//取得value字段的值

			info_Vector.add(info);
		}
		return info_Vector;
	}

?向XML文件添加值

	public static void addXmlCode(String file, String name, String value) { //测试通过		 
        try { 
        	DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    		DocumentBuilder builder = dbf.newDocumentBuilder();
    		Document doc = builder.parse(file); // 获取到xml文件
            //builder = factory.newDocumentBuilder(); 
            //Document doc = builder.parse(path); 
            doc.normalize();  
            Text textseg; 
            Element var = doc.createElement("var");  
            Element name1 = doc.createElement("name"); 
            textseg = doc.createTextNode(name); 
            name1.appendChild(textseg); 
            var.appendChild(name1); 
 
            Element name2 = doc.createElement("value"); 
            textseg = doc.createTextNode(value); 
            name2.appendChild(textseg); 
            var.appendChild(name2); 
 
            doc.getDocumentElement().appendChild(var); 
 
            TransformerFactory tFactory = TransformerFactory.newInstance(); 
            Transformer transformer; 
 
            transformer = tFactory.newTransformer(); 
            DOMSource source = new DOMSource(doc); 
            StreamResult result = new StreamResult(new java.io.File(file)); 
            transformer.transform(source, result); 
        } catch (Exception e) { 
 
        } 
    } 

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