20150729 Created By BaoXinjian
一、摘要
通过javax.xml.parsers.DocumentBuilder解析从系统系统导入的XML文件
此过程需要用到一些包方法
1. File：获取XML文件
2. DocumentBuilderFactory / DocumentBuilder ： 解析XML文件，获取节点结构
3. 节点值获取
3.1 NodeList：获取文件的节点列表
3.2 Node：获取节点列表中的某一个节点
3.3 Element：获取节点中的某一个子元素，并获取值
二、实现分析
1. 创建ImportEmployee.java程序
2. 实现解析的主要过程
package bxj.oracle.apps.ap.java;
import java.io.File;
import org.w3c.dom.*; import javax.xml.parsers.*; import org.xml.sax.*; import java.io.File; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; public class importEmployeeXML { //获取节点列表 private void importEmployeeXML(String xmlType) { try { //初始化参数，获取文件 DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder(); String empfilepath = "/u2/VIS/visappl/gavin/employeexml/employeexml.xml"; empfilepath=empfilepath.replace("/", File.separator); //获取更节点 File empxmlfile = new File(empfilepath); Document doc = docBuilder.parse (empxmlfile); doc.getDocumentElement ().normalize (); System.out.println ("Root element of the doc is " + doc.getDocumentElement().getNodeName()); //获取EMPLOYEE节点列表 NodeList listOfEmployees = doc.getElementsByTagName(xmlType); System.out.println("Employee Record Count="+listOfEmployees.getLength()); //循环根节点列表取值 for ( int i=0; i < listOfEmployees.getLength(); i++) { Node empNode = listOfEmployees.item(i); if (empNode.getNodeType() == Node.ELEMENT_NODE) { System.out.println("*************the "+(i+1)+"th node*************"); System.out.println("EMPLOYEEID="+getElementValue(empNode,"EMPLOYEEID")); System.out.println("EMPLOYEENUM="+getElementValue(empNode,"EMPLOYEENUM")); System.out.println("EMPLOYEENAME="+getElementValue(empNode,"EMPLOYEENAME")); System.out.println("EMPLOYEETYPE="+getElementValue(empNode,"EMPLOYEETYPE")); System.out.println("COUNTRY="+getElementValue(empNode,"COUNTRY")); System.out.println("ADDRESS="+getElementValue(empNode,"ADDRESS")); System.out.println("DESCRIPTION="+getElementValue(empNode,"DESCRIPTION")); } } }catch (Exception ex) { ex.printStackTrace(); } } //获取节点的值 private String getElementValue(Node node, String xmlType) { String result = null; if(node.getNodeType() == Node.ELEMENT_NODE){ Element firstPersonElement = (Element) node; NodeList firstNameList = firstPersonElement.getElementsByTagName(xmlType); Element firstNameElement = (Element) firstNameList.item(0); if (firstNameElement == null) { result= ""; } NodeList textFNList = firstNameElement.getChildNodes(); if (textFNList.item(0) == null) { result = ""; } if (((Node)textFNList.item(0)).getNodeValue() == null) { result = ""; } else { result = ((Node)textFNList.item(0)).getNodeValue().trim(); } } return result; } //主程序 public static void main(String[] args){ System.out.println("gavin main"); String xmlType = "EMPLOYEE"; importEmployeeXML importEmployeeXML = new importEmployeeXML(); importEmployeeXML.importEmployeeXML(xmlType); } }
三、运行测试
1. 运行测试
2. 创建XML测试数据文件
3. 通过system.out.println输出的XML信息数据，读取顺利成功，可以通过其他方法更新到VO或者Database中
Thanks and Regards
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