Java操作XML对象

秒速五厘米 2022-08-10 00:46 87阅读 0赞

\--org.w3c.dom对象---------------------------

（1）org.w3c.dom　W3C推荐的用于XML标准规划文档对象模型的接口；  
（2）org.xml.sax　 用于对XML进行语法分析的事件驱动的XML简单API（SAX）；  
（3）Javax.xml.parsers 解析器工厂工具，程序员获得并配置特殊的特殊语法分析器。

package com.primeton.eos.arp.report; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.StringReader; import java.util.ArrayList; import java.util.List; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.\*; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import com.primeton.tp.core.api.BizContext; /\*\* \* @author hujing \* @version 1.0 \* @date 2009-12-8 \* @class\_displayName DomReader \*/ public class DomReader \{ public DocumentBuilder builder; private Document doc; /\*\* \* 构造器 \* \* @throws Exception \*/ public DomReader() throws Exception \{ DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); this.builder = dbf.newDocumentBuilder(); this.doc = builder.newDocument(); \} /\*\* \* 解析xml字符串 \* \* @param xmlstr \* @throws ParserConfigurationException \* @throws SAXException \* @throws IOException \*/ public DomReader(String xmlstr) throws Exception \{ DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); StringReader sr = new StringReader(xmlstr); InputSource is = new InputSource(sr); this.doc = db.parse(is); \} /\*\* \* 解析xml文件 \* \* @param file \* @throws Exception \*/ public DomReader(File file) throws Exception \{ DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); this.doc = db.parse(file); \} /\*\* \* 取节点值 \* \* @param tagname \* @return List \*/ public List getNodeValues(String tagname) \{ List arr = new ArrayList(); doc.normalize(); NodeList list = doc.getElementsByTagName(tagname); for (int i = 0; i < list.getLength(); i++) \{ if (list.item(i).getFirstChild() != null) \{ arr.add(list.item(i).getFirstChild().getNodeValue()); \} \} return arr; \} /\*\* \* 重命名节点名 \* @param oldChild \* @param newName \* @throws Exception \*/ public void renameNodeName(Node oldChild,String newName) throws Exception \{ Node parent = oldChild.getParentNode(); Element newChild = doc.createElement(newName); // 是否有子节点 if (oldChild.hasChildNodes()) \{ NodeList temp = oldChild.getChildNodes(); for (int i = 0; i < temp.getLength(); i++) \{ newChild.appendChild(temp.item(i)); i--; \} \} // 是否有属性 if (oldChild.hasAttributes()) \{ NamedNodeMap map = oldChild.getAttributes(); Node tn = null; for (int j = 0; j < map.getLength(); j++) \{ tn = map.item(j); newChild.setAttribute(tn.getNodeName(), tn.getNodeValue()); \} \} parent.replaceChild(newChild, oldChild); \} \}