java-DOM解析xml文档

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博客分类：

j2se

xml

xml文档中的常见节点：

import javax.xml.parsers.*;
import java.io.*;
import org.w3c.dom.*;


public class code10_3 {
	static Document document;
	
	public static void main(String args[]){
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		try{
			DocumentBuilder db = dbf.newDocumentBuilder();
			//读取xml文档
			document = db.parse(new File("G:\\EclipseWorkPlace\\test.xml"));
			//获得根元素
			Node root = document.getDocumentElement();
			System.out.println("根节点的名字是：" + root.getNodeName());
			//获得根元素的子节点列表
			NodeList childs = root.getChildNodes();
			System.out.println("子节点的长度是：" + childs.getLength());
			getElement(childs);
		}catch (Exception e){
			System.out.println(e);
		}
	}
	
	public static void getElement(NodeList childs){
		int i=0;
		if (childs.getLength() == 0){
			//该孩子没有子节点
			System.out.println("该孩子没有子节点!");
			return;
		}
		
		for (i=0; i<childs.getLength(); i++){
			//取得第i个子节点
			Node node = childs.item(i);
			//获取节点的类型，可以是ElementNode,TextNode,DocumentNode等
			short nodetype = node.getNodeType();
			/*ElementNode类型的节点可以包含子节点和属性等*/
			if (nodetype == Node.ELEMENT_NODE){
				//得到节点的名称
				String name = node.getNodeName();
				String attrValue = "", attrName = "";
				System.out.println("This is element! name is:" + name);
				if (node.hasAttributes()){
					
					NamedNodeMap attrlist = node.getAttributes();
					for (int j=0; j<attrlist.getLength(); j++){
						Node attrNode = attrlist.item(j);
						attrName = attrNode.getNodeName();
						attrValue = attrNode.getNodeValue();
						System.out.println("this element attr is:"+
						attrValue + ";attrname is :" + attrName);
					}
				}
				
				//如有子节点，递归调用getElement（）
				if (node.hasChildNodes()){
					getElement(node.getChildNodes());
				}
			}
			
			/*Text类型节点没有子节点，节点名为#text，节点的值为XML文档中的元素值*/
			if (nodetype == Node.TEXT_NODE){
				//该节点的name是“#text”
				String txtName = node.getNodeName();
				//取出Text类型节点的值
				Node thisparent = node.getParentNode();
				Node txtNode = thisparent.getChildNodes().item(0);
				String txtValue = txtNode.getNodeValue();
				if (txtValue.trim().length() > 0){
					System.out.println("txtName=" + txtName +
							"; txtValue = " + txtValue.trim());
				}
			}
		}
	}
}

<?xml version="1.0" encoding='utf-8'?>
<completedRequest currentTime='' startDay='2009-12-23'
	endDay='2009-12-23'>
	<building buildingName='1'>
		<floor floorName='1'>
			<line lineName='N1'>
				<completedInfo seatNo='11' responseTime='11:25'
					RepairTime='11:23'>
					<completedDetail requestTime='11:23'
						requestStaffNo='H0050' requestStaffName='张三' responseTime='11:25'
						responseStaffNo='J332' responseStaffName='李四' completeTime='11:50'
						completeStaffNo='Y6500' completeStaffName='梁五'>
					</completedDetail>
				</completedInfo>
				
				<completedInfo seatNo='12' responseTime='11:25'
					RepairTime='11:23'>
					<completedDetail requestTime='11:23'
						requestStaffNo='H00501' requestStaffName='张三1' responseTime='11:25'
						responseStaffNo='J3321' responseStaffName='李四1' completeTime='11:50'
						completeStaffNo='Y65001' completeStaffName='梁五1'>
					</completedDetail>
				</completedInfo>
			</line>
		</floor>
	</building>
	<building buildingName='1'>
		<floor floorName='1'>
			<line lineName='N1'>
				<completedInfo seatNo='11' responseTime='11:25'
					RepairTime='11:23'>
					<completedDetail requestTime='11:23'
						requestStaffNo='H0050' requestStaffName='张三' responseTime='11:25'
						responseStaffNo='J332' responseStaffName='李四' completeTime='11:50'
						completeStaffNo='Y6500' completeStaffName='梁五'>
					</completedDetail>
				</completedInfo>
				
				<completedInfo seatNo='12' responseTime='11:25'
					RepairTime='11:23'>
					<completedDetail requestTime='11:23'
						requestStaffNo='H00501' requestStaffName='张三1' responseTime='11:25'
						responseStaffNo='J3321' responseStaffName='李四1' completeTime='11:50'
						completeStaffNo='Y65001' completeStaffName='梁五1'>
					</completedDetail>
				</completedInfo>
			</line>
		</floor>
	</building>
	
	<building buildingName='1'>
		<floor floorName='1'>
			<line lineName='N1'>
				<completedInfo seatNo='11' responseTime='11:25'
					RepairTime='11:23'>
					<completedDetail requestTime='11:23'
						requestStaffNo='H0050' requestStaffName='张三' responseTime='11:25'
						responseStaffNo='J332' responseStaffName='李四' completeTime='11:50'
						completeStaffNo='Y6500' completeStaffName='梁五'>
					</completedDetail>
				</completedInfo>
				
				<completedInfo seatNo='12' responseTime='11:25'
					RepairTime='11:23'>
					<completedDetail requestTime='11:23'
						requestStaffNo='H00501' requestStaffName='张三1' responseTime='11:25'
						responseStaffNo='J3321' responseStaffName='李四1' completeTime='11:50'
						completeStaffNo='Y65001' completeStaffName='梁五1'>
					</completedDetail>
				</completedInfo>
			</line>
		</floor>
	</building>
	
</completedRequest>

结果：
=============================================================
根节点的名字是：completedRequest
子节点的长度是：7
This is element! name is:building
this element attr is:1;attrname is :buildingName
This is element! name is:floor
this element attr is:1;attrname is :floorName
This is element! name is:line
this element attr is:N1;attrname is :lineName
This is element! name is:completedInfo
this element attr is:11:23;attrname is :RepairTime
this element attr is:11:25;attrname is :responseTime
this element attr is:11;attrname is :seatNo
This is element! name is:completedDetail
this element attr is:梁五;attrname is :completeStaffName
this element attr is:Y6500;attrname is :completeStaffNo
this element attr is:11:50;attrname is :completeTime
this element attr is:张三;attrname is :requestStaffName
this element attr is:H0050;attrname is :requestStaffNo
this element attr is:11:23;attrname is :requestTime
this element attr is:李四;attrname is :responseStaffName
this element attr is:J332;attrname is :responseStaffNo
this element attr is:11:25;attrname is :responseTime
This is element! name is:completedInfo
this element attr is:11:23;attrname is :RepairTime
this element attr is:11:25;attrname is :responseTime
this element attr is:12;attrname is :seatNo
This is element! name is:completedDetail
this element attr is:梁五1;attrname is :completeStaffName
this element attr is:Y65001;attrname is :completeStaffNo
this element attr is:11:50;attrname is :completeTime
this element attr is:张三1;attrname is :requestStaffName
this element attr is:H00501;attrname is :requestStaffNo
this element attr is:11:23;attrname is :requestTime
this element attr is:李四1;attrname is :responseStaffName
this element attr is:J3321;attrname is :responseStaffNo
this element attr is:11:25;attrname is :responseTime
This is element! name is:building
this element attr is:1;attrname is :buildingName
This is element! name is:floor
this element attr is:1;attrname is :floorName
This is element! name is:line
this element attr is:N1;attrname is :lineName
This is element! name is:completedInfo
this element attr is:11:23;attrname is :RepairTime
this element attr is:11:25;attrname is :responseTime
this element attr is:11;attrname is :seatNo
This is element! name is:completedDetail
this element attr is:梁五;attrname is :completeStaffName
this element attr is:Y6500;attrname is :completeStaffNo
this element attr is:11:50;attrname is :completeTime
this element attr is:张三;attrname is :requestStaffName
this element attr is:H0050;attrname is :requestStaffNo
this element attr is:11:23;attrname is :requestTime
this element attr is:李四;attrname is :responseStaffName
this element attr is:J332;attrname is :responseStaffNo
this element attr is:11:25;attrname is :responseTime
This is element! name is:completedInfo
this element attr is:11:23;attrname is :RepairTime
this element attr is:11:25;attrname is :responseTime
this element attr is:12;attrname is :seatNo
This is element! name is:completedDetail
this element attr is:梁五1;attrname is :completeStaffName
this element attr is:Y65001;attrname is :completeStaffNo
this element attr is:11:50;attrname is :completeTime
this element attr is:张三1;attrname is :requestStaffName
this element attr is:H00501;attrname is :requestStaffNo
this element attr is:11:23;attrname is :requestTime
this element attr is:李四1;attrname is :responseStaffName
this element attr is:J3321;attrname is :responseStaffNo
this element attr is:11:25;attrname is :responseTime
This is element! name is:building
this element attr is:1;attrname is :buildingName
This is element! name is:floor
this element attr is:1;attrname is :floorName
This is element! name is:line
this element attr is:N1;attrname is :lineName
This is element! name is:completedInfo
this element attr is:11:23;attrname is :RepairTime
this element attr is:11:25;attrname is :responseTime
this element attr is:11;attrname is :seatNo
This is element! name is:completedDetail
this element attr is:梁五;attrname is :completeStaffName
this element attr is:Y6500;attrname is :completeStaffNo
this element attr is:11:50;attrname is :completeTime
this element attr is:张三;attrname is :requestStaffName
this element attr is:H0050;attrname is :requestStaffNo
this element attr is:11:23;attrname is :requestTime
this element attr is:李四;attrname is :responseStaffName
this element attr is:J332;attrname is :responseStaffNo
this element attr is:11:25;attrname is :responseTime
This is element! name is:completedInfo
this element attr is:11:23;attrname is :RepairTime
this element attr is:11:25;attrname is :responseTime
this element attr is:12;attrname is :seatNo
This is element! name is:completedDetail
this element attr is:梁五1;attrname is :completeStaffName
this element attr is:Y65001;attrname is :completeStaffNo
this element attr is:11:50;attrname is :completeTime
this element attr is:张三1;attrname is :requestStaffName
this element attr is:H00501;attrname is :requestStaffNo
this element attr is:11:23;attrname is :requestTime
this element attr is:李四1;attrname is :responseStaffName
this element attr is:J3321;attrname is :responseStaffNo
this element attr is:11:25;attrname is :responseTime
===============================================================