使用 JDK 自带的dom 操作XML

  需要导入的默认的dom 类

import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; 

/**解析本地xml(响应) 文件 格式 见定义*/ public static PosSign domXml(String fileName){ PosSign pos = new PosSign(); Element element = null; File f = new File(fileName); DocumentBuilder db = null; // documentBuilder为抽象不能直接实例化(将XML文件转换为DOM文件) DocumentBuilderFactory dbf = null; try { dbf = DocumentBuilderFactory.newInstance(); // 返回documentBuilderFactory对象 db = dbf.newDocumentBuilder();// 返回db对象用documentBuilderFatory对象获得返回documentBuildr对象 Document dt = db.parse(f); // 得到一个DOM并返回给document对象 element = dt.getDocumentElement();// 得到一个elment根元素 System.out.println("根元素：" + element.getNodeName()); // 获得根节点 NodeList childNodes = element.getChildNodes(); // 获得根元素下的子节点 for (int i = 0; i < childNodes.getLength(); i++) // 遍历这些子节点 { Node node1 = childNodes.item(i); // childNodes.item(i); // 获得每个对应位置i的结点 if ("PUB".equals(node1.getNodeName())) { NodeList nodeDetail = node1.getChildNodes(); // 获得<Accounts>下的节点 for (int j = 0; j < nodeDetail.getLength(); j++) { // 遍历<Accounts>下的节点 Node detail = nodeDetail.item(j); // 获得<Accounts>元素每一个节点 if ("TRXTIME".equals(detail.getNodeName())) { // 输出PUB System.out.println("交易时间: "+ detail.getTextContent()); pos.setTradeTime(detail.getTextContent()); } else if ("TRXDATE".equals(detail.getNodeName())) { // 输出pass System.out.println("交易日期: "+ detail.getTextContent()); pos.setTradeDate(detail.getTextContent()); } } }else if ("OUT".equals(node1.getNodeName())) { NodeList nodeDetail = node1.getChildNodes(); // 获得<Accounts>下的节点 for (int j = 0; j < nodeDetail.getLength(); j++) { // 遍历<Accounts>下的节点 Node detail = nodeDetail.item(j); // 获得<Accounts>元素每一个节点 if ("TRXCODE".equals(detail.getNodeName())) { // 输出PUB System.out.println("83390: "+ detail.getTextContent()); pos.setJiaoyma(detail.getTextContent()); } else if ("RETCODE".equals(detail.getNodeName())) { // 输出pass System.out.println("响应码: "+ detail.getTextContent()); pos.setResponseCode(detail.getTextContent()); }else if("RETMSG".equals(detail.getNodeName())){ System.out.println("响应信息: "+ detail.getTextContent()); pos.setResponseInfo(detail.getTextContent()); }else if("POSID".equals(detail.getNodeName())){ System.out.println("pos终端编号: "+ detail.getTextContent()); pos.setPosPartNum(detail.getTextContent()); }else if("MERID".equals(detail.getNodeName())){ System.out.println("pos商场编号: "+ detail.getTextContent()); pos.setPosShopNum(detail.getTextContent()); }else if("PINKEY".equals(detail.getNodeName())){ System.out.println("PIN_KEY: "+ detail.getTextContent()); pos.setPin_KEY( detail.getTextContent()); }else if("TKEY".equals(detail.getNodeName())){ System.out.println("T_KEY: "+ detail.getTextContent()); pos.setT_KEY(detail.getTextContent()); } } } } } catch (Exception e) { System.out.println(e); } return pos; } 

<?xml version="1.0" encoding="GBK" ?> <COMM> <PUB> <TRXTIME>交易时间</TRXTIME> <TRXDATE>交易日期</TRXDATE> </PUB> <OUT> <TRXCODE>83390</TRXCODE> <RETCODE>响应码</RETCODE> <RETMSG>响应信息</RETMSG> <POSID>pos终端编号</POSID> <MERID>pos商场编号</MERID> <PINKEY>PIN_KEY</PINKEY> <TKEY>T_KEY</TKEY> </OUT> </COMM> 

其中有一个实体，是把读取到的xml 数据封装到一个javaBean 中。

public class PosSign implements Serializable { /**交易时间*/ private String tradeTime; /**交易日期*/ private String tradeDate; /**交易码*/ private String jiaoyma ; /**响应代码*/ private String responseCode; /**响应信息*/ private String responseInfo; /**pos终端编号*/ private String posPartNum; /**pos商场编号*/ private String posShopNum; /**终端流水号*/ private String pointNum; /**PIN_KEY*/ private String pin_KEY; /**T_KEY*/ private String t_KEY; getters(); setters(); }