标签:解析 、xm l、dom
package com.softeem.xml.util; import java.io.File; import java.util.HashMap; import java.util.Map; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.*; import com.softeem.xml.dto.ClassDTO; import com.softeem.xml.dto.CollegeDTO; import com.softeem.xml.dto.StudentDTO; public class DOMParseXML { public static void main(String[] args) throws Exception { String path = "D:/stus.xml"; CollegeDTO c = parseXML(path); //获取信息打印 System.out.println(c.getClasses().get("计科1班").getStus().get("20111114").getStuName()); } public static CollegeDTO parseXML(String path){ CollegeDTO college = null; try { //dom解析 //①加载被解析的xml文件 //通过工厂类创建DocumentBuilder类的对象 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); //调用DocumentBuilder类中的parse方法,加载一个xml文件 //dom对象就相当于一个xml文件 Document dom = builder.parse(new File(path)); //②将dom对象中加载的xml文件的数据,有顺序的取出来 //Document类中的getDocumentElement()方法:获取到xml文件的根标签 Element root = dom.getDocumentElement(); //1.获取元素属性 //Element类中的getAttribute方法:从当前element对象元素中,根据属性名取到属性值 //System.out.println(root.getTagName()); //NodeList ns = root.getElementsByTagName("class");*********** String cid = root.getAttribute("id"); String cname = root.getAttribute("name"); //2.获取元素的子标签 NodeList nodes = root.getChildNodes(); //System.out.println(nodes.getLength()); Map<String, ClassDTO> classes = new HashMap<String, ClassDTO>(); for (int i = 0; i < nodes.getLength(); i++) { Node node = nodes.item(i); String nodeName = node.getNodeName(); //String nodeValue = node.getNodeValue(); //int nodeType = node.getNodeType();//返回short型变量 if("class".equals(nodeName)){ // NamedNodeMap map = node.getAttributes(); // Node attr = map.getNamedItem("className"); // String className = attr.getNodeValue(); String className = node.getAttributes().getNamedItem("className").getNodeValue(); String cnum = node.getAttributes().getNamedItem("classNum").getNodeValue(); //获取节点的子节点 NodeList ns2 = node.getChildNodes(); Map<String, StudentDTO> stus = new HashMap<String, StudentDTO>(); for (int j = 0; j < ns2.getLength(); j++) { Node n = ns2.item(j); if("student".equals(n.getNodeName())){ String snum = n.getAttributes().getNamedItem("stuNum").getNodeValue(); String sname = n.getAttributes().getNamedItem("stuName").getNodeValue(); String ssex = n.getAttributes().getNamedItem("stuSex").getNodeValue(); String sage = n.getAttributes().getNamedItem("stuAge").getNodeValue(); //放进dto StudentDTO stu = new StudentDTO(snum, sname, ssex, Integer.parseInt(sage)); stus.put(snum, stu);//放一个stu } } ClassDTO cla = new ClassDTO(className, Integer.parseInt(cnum), stus); classes.put(className, cla); } } college = new CollegeDTO(Integer.parseInt(cid),cname,classes); } catch (Exception e) { System.err.println("出现错误!"); } return college; } }
<!--stus.xml文件--> <?xml version="1.0" encoding="UTF-8"?> <college id="1001" name=""> <class className="计科1班" classNum="41"> <student stuNum="20111111" stuName="" stuSex="男" stuAge="20" /> <student stuNum="20111112" stuName="" stuSex="男" stuAge="21" /> <student stuNum="20111113" stuName="" stuSex="女" stuAge="20" /> <student stuNum="20111114" stuName="" stuSex="男" stuAge="19" /> </class> <class className="网工1班" classNum="49"> <student stuNum="20112111" stuName="" stuSex="男" stuAge="21" /> <student stuNum="20112112" stuName="" stuSex="男" stuAge="20" /> <student stuNum="20112113" stuName="" stuSex="女" stuAge="22" /> </class> </college>
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标签:解析 、xm l、dom
原文地址:http://974124461.blog.51cto.com/8685015/1546105