使用Java Application处理XML文件时遇到的问题

时间：2017-11-28 13:27:27

标签： java xml xml-parsing

我是一个非常初学者，很抱歉提出这些简单的问题。希望得到用户的帮助。谢谢你的时间！

Q1。在控制台上，结果＆＃39; 5＆＃39;控制摘要显示在下一行而不是旁边。我可以知道如何获得这样的控制台结果[控制摘要：5]？

Q2。有一个标签＆＃39; items＆＃39;在xml.file中它正在包装＆＃39;项目＆＃39;及其内容。标签＆＃39;测试＆＃39;是根本元素，但这个＆＃39;项目＆＃39;标签？任何人都可以告诉我它是什么以及如何在代码中转换为java应用程序？

XML文件

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<?xml version="1.0" encoding="utf-8"?>
<test xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	xmlns="http://www.stee.com.sg/q2.xsd">
	<controlsummary>
		<totalrecords>5</totalrecords>
	</controlsummary>
	<items>
		<item>
			<data>TEST1</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>492.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>420.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>1</loc_id>
			<loc_desc>Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch</loc_desc>
			<company_id>6001</company_id>
			<company_name>Great Real Estate pte ltd</company_name>
		</item>
		<item>
			<data>TEST7</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>2228.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>2260.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>5</loc_id>
			<loc_desc>Taumatawhakatangi­hangakoauauotamatea­turipukakapikimaunga­horonukupokaiwhen­uakitanatahu</loc_desc>
			<company_id>5010</company_id>
			<company_name>Altitude Fulle Coverage</company_name>
		</item>
		<item>
			<data>TEST3</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>1241.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>1021.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>3</loc_id>
			<loc_desc>Chargoggagoggmanchauggagoggchaubunagungamaugg</loc_desc>
			<company_id>5111</company_id>
			<company_name>Big Beeing Craze Food Mania</company_name>
		</item>
		<item>
			<data>TEST5</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>550.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>0.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>0</loc_id>
			<loc_desc>Tweebuffelsmeteenskootmorsdoodgeskietfontein</loc_desc>
			<company_id>73</company_id>
			<company_name>Monotone Classic Paper Producer</company_name>
		</item>
		<item>
			<data>TEST6</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>3664.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>3450.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>6</loc_id>
			<loc_desc>Pekwachnamaykoskwaskwaypinwanik</loc_desc>
			<company_id>104</company_id>
			<company_name>No Name Futuristic Para</company_name>
		</item>
	</items>
</test>
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Java应用程序

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package question2_try1;

import java.io.File;
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;

public class ProcessXML {

	public static void main (String[] args) {
		
		try {
			File fXmlFile = new File("C:\\Users\\User\\Desktop\\ST eletronics\\Q2_20170206112222.xml");
			DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
			Document doc = dBuilder.parse(fXmlFile);
			
			doc.getDocumentElement().normalize();
			
			System.out.println("Root element :" +doc.getDocumentElement().getNodeName());
			
			//controlsummary & items
			
			
			System.out.println("Control summary :" +doc.getElementsByTagName("controlsummary").item(0).getTextContent());
			
			
			
			NodeList nList = doc.getElementsByTagName("item");
			
			System.out.println("----------------------------");
			
			for (int temp = 0; temp < nList.getLength(); temp++) {

				Node nNode = nList.item(temp);
				
				System.out.println("\nCurrent Element :" + nNode.getNodeName());

				if (nNode.getNodeType() == Node.ELEMENT_NODE) {

					Element eElement = (Element) nNode;

					System.out.println("Data : " + eElement.getElementsByTagName("data").item(0).getTextContent());
					System.out.println("Data datetime : " + eElement.getElementsByTagName("data_datetime").item(0).getTextContent());
					System.out.println("Total a : " + eElement.getElementsByTagName("total_a").item(0).getTextContent());
					System.out.println("Total a in unit : " + eElement.getElementsByTagName("total_a_in_unit").item(0).getTextContent());
					System.out.println("Total b : " + eElement.getElementsByTagName("total_b").item(0).getTextContent());
					System.out.println("Total b in unit : " + eElement.getElementsByTagName("total_b_in_unit").item(0).getTextContent());
					System.out.println("Loc id : " + eElement.getElementsByTagName("loc_id").item(0).getTextContent());
					System.out.println("Loc desc : " + eElement.getElementsByTagName("loc_desc").item(0).getTextContent());
					System.out.println("Company id : " + eElement.getElementsByTagName("company_id").item(0).getTextContent());
					System.out.println("Company Name : " + eElement.getElementsByTagName("company_name").item(0).getTextContent());

				}
			}
			
		}catch (Exception e) {
		e.printStackTrace();	
		}
	}	
}
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Console:
Root element :test
Control summary :
		5
----------------------------

Current Element :item
Data : TEST1
Data datetime : 20120901000000
Total a : 492.00
Total a in unit : TONNES
Total b : 420.00
Total b in unit : TONNES
Loc id : 1
Loc desc : Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch
Company id : 6001
Company Name : Great Real Estate pte ltd

Current Element :item
Data : TEST7
Data datetime : 20120901000000
Total a : 2228.00
Total a in unit : TONNES
Total b : 2260.00
Total b in unit : TONNES
Loc id : 5
Loc desc : Taumatawhakatangi­hangakoauauotamatea­turipukakapikimaunga­horonukupokaiwhen­uakitanatahu
Company id : 5010
Company Name : Altitude Fulle Coverage

Current Element :item
Data : TEST3
Data datetime : 20120901000000
Total a : 1241.00
Total a in unit : TONNES
Total b : 1021.00
Total b in unit : TONNES
Loc id : 3
Loc desc : Chargoggagoggmanchauggagoggchaubunagungamaugg
Company id : 5111
Company Name : Big Beeing Craze Food Mania

Current Element :item
Data : TEST5
Data datetime : 20120901000000
Total a : 550.00
Total a in unit : TONNES
Total b : 0.00
Total b in unit : TONNES
Loc id : 0
Loc desc : Tweebuffelsmeteenskootmorsdoodgeskietfontein
Company id : 73
Company Name : Monotone Classic Paper Producer

Current Element :item
Data : TEST6
Data datetime : 20120901000000
Total a : 3664.00
Total a in unit : TONNES
Total b : 3450.00
Total b in unit : TONNES
Loc id : 6
Loc desc : Pekwachnamaykoskwaskwaypinwanik
Company id : 104
Company Name : No Name Futuristic Para
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1 个答案:

答案 0 :(得分：0)

对于您的第一个问题 - 您可以直接使用totalRecords标记，它应该可以正常工作。

System.out.println("Control summary :" +doc.getElementsByTagName("totalrecords").item(0).getTextContent());

对于你的第二个问题 - items只是一个item（子元素）列表。 Test是你的根标签（正如你已经提到的），而items只是另一个有多个子元素的标签。您可以拥有多个不同的父标记，这些标记可以包含多个子元素。

我正在更新你的XML，最后添加一个新的标签价格给你一个例子。它包含两个子元素的价格。我还更新了代码来读取块。该代码还包含您第一个问题的答案。

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<?xml version="1.0" encoding="utf-8"?>
<test xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	xmlns="http://www.stee.com.sg/q2.xsd">
	<controlsummary>
		<totalrecords>5</totalrecords>
	</controlsummary>
	<items>
		<item>
			<data>TEST1</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>492.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>420.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>1</loc_id>
			<loc_desc>Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch</loc_desc>
			<company_id>6001</company_id>
			<company_name>Great Real Estate pte ltd</company_name>
		</item>
		<item>
			<data>TEST7</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>2228.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>2260.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>5</loc_id>
			<loc_desc>Taumatawhakatangi­hangakoauauotamatea­turipukakapikimaunga­horonukupokaiwhen­uakitanatahu</loc_desc>
			<company_id>5010</company_id>
			<company_name>Altitude Fulle Coverage</company_name>
		</item>
		<item>
			<data>TEST3</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>1241.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>1021.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>3</loc_id>
			<loc_desc>Chargoggagoggmanchauggagoggchaubunagungamaugg</loc_desc>
			<company_id>5111</company_id>
			<company_name>Big Beeing Craze Food Mania</company_name>
		</item>
		<item>
			<data>TEST5</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>550.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>0.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>0</loc_id>
			<loc_desc>Tweebuffelsmeteenskootmorsdoodgeskietfontein</loc_desc>
			<company_id>73</company_id>
			<company_name>Monotone Classic Paper Producer</company_name>
		</item>
		<item>
			<data>TEST6</data>
			<data_datetime>20120901000000</data_datetime>
			<total_a>3664.00</total_a>
			<total_a_in_unit>TONNES</total_a_in_unit>
			<total_b>3450.00</total_b>
			<total_b_in_unit>TONNES</total_b_in_unit>
			<loc_id>6</loc_id>
			<loc_desc>Pekwachnamaykoskwaskwaypinwanik</loc_desc>
			<company_id>104</company_id>
			<company_name>No Name Futuristic Para</company_name>
		</item>
	</items>
 <prices>
   <price>
	   <data>TEST5</data>
	   <unitPrice>5</unitPrice>
   </price>
    <price>
	   <data>TEST7</data>
	   <unitPrice>15</unitPrice>
   </price>
</prices>
</test>
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更新代码

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package question2_try1;

import java.io.File;
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;

public class ProcessXML {

	public static void main (String[] args) {
		
		try {
			File fXmlFile = new File("C:\\Users\\User\\Desktop\\ST eletronics\\Q2_20170206112222.xml");
			DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
			Document doc = dBuilder.parse(fXmlFile);
			
			doc.getDocumentElement().normalize();
			
			System.out.println("Root element :" +doc.getDocumentElement().getNodeName());
			
			//controlsummary & items
			
			
			System.out.println("Control summary :" +doc.getElementsByTagName("totalrecords").item(0).getTextContent());
			
			
			
			NodeList nList = doc.getElementsByTagName("item");
			
			System.out.println("----------------------------");
			
			for (int temp = 0; temp < nList.getLength(); temp++) {

				Node nNode = nList.item(temp);
				
				System.out.println("\nCurrent Element :" + nNode.getNodeName());

				if (nNode.getNodeType() == Node.ELEMENT_NODE) {

					Element eElement = (Element) nNode;

					System.out.println("Data : " + eElement.getElementsByTagName("data").item(0).getTextContent());
					System.out.println("Data datetime : " + eElement.getElementsByTagName("data_datetime").item(0).getTextContent());
					System.out.println("Total a : " + eElement.getElementsByTagName("total_a").item(0).getTextContent());
					System.out.println("Total a in unit : " + eElement.getElementsByTagName("total_a_in_unit").item(0).getTextContent());
					System.out.println("Total b : " + eElement.getElementsByTagName("total_b").item(0).getTextContent());
					System.out.println("Total b in unit : " + eElement.getElementsByTagName("total_b_in_unit").item(0).getTextContent());
					System.out.println("Loc id : " + eElement.getElementsByTagName("loc_id").item(0).getTextContent());
					System.out.println("Loc desc : " + eElement.getElementsByTagName("loc_desc").item(0).getTextContent());
					System.out.println("Company id : " + eElement.getElementsByTagName("company_id").item(0).getTextContent());
					System.out.println("Company Name : " + eElement.getElementsByTagName("company_name").item(0).getTextContent());

				}
			}
       NodeList npricesList = doc.getElementsByTagName("price");
		
		System.out.println("============[- _ -]======================");
		
		for (int temp = 0; temp < npricesList.getLength(); temp++) {

			Node nNode = npricesList.item(temp);
			
			System.out.println("\nCurrent Element :" + nNode.getNodeName());

			if (nNode.getNodeType() == Node.ELEMENT_NODE) {

				Element eElement = (Element) nNode;

				System.out.println("Data : " + eElement.getElementsByTagName("data").item(0).getTextContent());
				System.out.println("price : " + eElement.getElementsByTagName("unitPrice").item(0).getTextContent());
				

			}
		}
			
		}catch (Exception e) {
		e.printStackTrace();	
		}
	}	
}
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