JAVA - 解析 XML 文件未正确存储数据

Question

我正在很好地解析 XML 文件，除了它不保存找到的第一个数据而只保存第二个(最后一个)

这是文件:

package main;

import java.io.File;
import java.util.ArrayList;

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;

import main.advertise.Advert;
import main.advertise.guilds.Guild;
import main.advertise.server.Server;

public class Servers {

	//private Server[] servers;
	//private Guild[] guilds;
	
	private ArrayList<Server> servers = new ArrayList<Server>();
	private ArrayList<Guild> guilds =  new ArrayList<Guild>();
	

	
	@SuppressWarnings("null")
	public void init() {
		
		Server server = new Server("", "", "", "", new String[] {}, new String[] {}, 0, 0, 0);
		Guild guild = new Guild("", "", "", "", new String[] {}, 0);
		
	    try {
	    	

		

	    	File fXmlFile = new File("C:/Users/NULL/Desktop/Adverts.xml");
	    	DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
	    	DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
	    	Document doc = dBuilder.parse(fXmlFile);
	    			
	    	doc.getDocumentElement().normalize();
	    	
	
		
	    	NodeList nList = doc.getElementsByTagName("advertisement");
	    	
	    	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("Server Name - " + eElement.getElementsByTagName("servername").item(0).getTextContent());
	    			server.setServerName(eElement.getElementsByTagName("servername").item(0).getTextContent());
	    			server.setDiscordLink(eElement.getElementsByTagName("discordlink").item(0).getTextContent());
	    			server.setOwnerId(eElement.getElementsByTagName("ownerid").item(0).getTextContent());
	    			server.setLogoUrl(eElement.getElementsByTagName("logourl").item(0).getTextContent());
	    			
  				
	    			
	    		    NodeList features = doc.getElementsByTagName("feature");

	    		    String[] featureList = new String[features.getLength()];

	    		    for (int i = 0; i < features.getLength(); i++) {
	    		      Node node = features.item(i);
	    		      featureList[i]=features.item(i).getTextContent();
	    		      System.out.println(features.item(i).getTextContent() + " - new");
	    		    }
	    		    server.setServerFeatures(featureList);
	    			
	    			

		    			
		    		    NodeList images = doc.getElementsByTagName("image");

		    		    String[] namesArray = new String[images.getLength()];

		    		    for (int i = 0; i < images.getLength(); i++) {
		    		      Node node = images.item(i);
		    		      namesArray[i]=images.item(i).getTextContent();
		    		      System.out.println(images.item(i).getTextContent() + " - new");
		    		    }
		    			server.setServerImages(namesArray);
		    			
		    			
		    		    
		    			
		    			
		    			
    	    			guild.setGuildId(eElement.getElementsByTagName("id").item(0).getTextContent());
    	    			guild.setGuildName(eElement.getElementsByTagName("guildname").item(0).getTextContent());
    	    			System.out.println(eElement.getElementsByTagName("guildname").item(0).getTextContent());
    	    			guild.setAdvertiseChannel(eElement.getElementsByTagName("advertchannel").item(0).getTextContent());
    	    			guild.setCommandChannel(eElement.getElementsByTagName("commandchannel").item(0).getTextContent());
    	    			
    	    		    NodeList users = doc.getElementsByTagName("user");

    	    		    String[] namessArray = new String[users.getLength()];

    	    		    for (int i = 0; i < users.getLength(); i++) {
    	    		      Node node = users.item(i);
    	    		      namessArray[i]=users.item(i).getTextContent();
    	    		      System.out.println(users.item(i).getTextContent() + " - new users");
    	    		    }
    	    			guild.setAuthorisedUsers(namessArray);
    	    			
    	    			
    	    			guild.setAdvertisementDelay(Integer.parseInt(eElement.getElementsByTagName("delay").item(0).getTextContent()));
    	    			//guilds[tempp] = guild;
    	    			guilds.add(guild);
		    			servers.add(server);
		    			Advert advert = new Advert(guild, server);
		    			Main.servers.add(advert);
		    			
	    		}

	    	}

	
	    	
	        } catch (Exception e) {
	    	e.printStackTrace();
	        }
	    System.out.println("Size: ----------------- " + servers.size());
		for(int i = 0; i < servers.size(); i++) {
			if(guilds.get(i) == null)
				return;
			Advert v = new Advert(guilds.get(i), servers.get(i), servers.get(i).getServerName());
			if(!Main.servers.contains(v)) {
		//Main.servers.add(new Advert(guilds.get(i), servers.get(i), servers.get(i).getServerName()));
			}
		}
		System.out.println("    "+Main.servers.get(0).getServer().getServerName());
		System.out.println("    "+Main.servers.get(0).getGuild().getGuildName());
		System.out.println("    "+Main.servers.get(1).getServer().getServerName());
		System.out.println("    "+Main.servers.get(1).getGuild().getGuildName());
		
	      }

	    }

这是 XML 文件:

<advertisements>

<advertisement>
<server>
<servername>Zenith</servername>
<discordlink>http://zenithps.org</discordlink>
<ownerid>304558905306906624</ownerid>
<logourl>http://zenithps.org/Zenith%20Logo.png</logourl>
<feature>Feature1</feature>
<feature>Feature2</feature>
<image>C:/Users/NULL/Pictures/Zenith Logo.png</image>
<image>C:/Users/NULL/Pictures/Description Hovers.gif</image>
<image>C:/Users/NULL/Pictures/Launcher.png</image>
<image>C:/Users/NULL/Pictures/Upgrade.gif</image>
<image>C:/Users/NULL/Pictures/Pet.png</image>
</server>
<guild>
<id>642406906580828181</id>
<guildname>Guild</guildname>
<advertchannel>658936539803418624</advertchannel>
<commandchannel>658936539803418624</commandchannel>
<user>304558905306906624</user>
<delay>25000</delay>
</guild>
</advertisement>


<advertisement>
<server>
<servername>Test Server</servername>
<discordlink>http://zenithps.org</discordlink>
<ownerid>304558905306906624</ownerid>
<logourl>http://zenithps.org/Zenith%20Logo.png</logourl>
<feature>Feature1</feature>
<feature>Feature2</feature>
<image>C:/Users/NULL/Pictures/Zenith Logo.png</image>
<image>C:/Users/NULL/Pictures/Description Hovers.gif</image>
<image>C:/Users/NULL/Pictures/Launcher.png</image>
<image>C:/Users/NULL/Pictures/Upgrade.gif</image>
<image>C:/Users/NULL/Pictures/Pet.png</image>
</server>
<guild>
<id>6424069110828181</id>
<guildname>Test Guild</guildname>
<advertchannel>658936539803418624</advertchannel>
<commandchannel>658936539803418624</commandchannel>
<user>304558905306906624</user>
<delay>25000</delay>
</guild>
</advertisement>
</advertisements>

打印时

System.out.println("    "+Main.servers.get(0).getServer().getServerName());
System.out.println("    "+Main.servers.get(0).getGuild().getGuildName());
System.out.println("    "+Main.servers.get(1).getServer().getServerName());
System.out.println("    "+Main.servers.get(1).getGuild().getGuildName());

我收到回复了 测试服务器 测试公会 测试服务器 测试公会

但是，这应该是 真力时 公会 测试服务器 测试公会

它在解析文件时使用以下方法打印 Zenith 和 Guild:

System.out.println("Server Name - " + eElement.getElementsByTagName("servername").item(0).getTextContent());

System.out.println(eElement.getElementsByTagName("guildname").item(0).getTextContent());

但它没有正确存储它。我尝试过移动一些东西，但似乎无法做到正确。

Answer 1

这里 Main.servers.get(0) 和 Main.servers.get(1) 都指向同一个实例。对于每个服务器元素，只有一个实例被一次又一次修改，而不是创建一个新的服务器/公会实例，因此服务器/公会将拥有最后一个元素的数据。请将初始化移至 for 循环内，它应该可以正常工作。
请移步

Server server = new Server("", "", "", "", new String[] {}, new String[] {}, 0, 0, 0);
Guild guild = new Guild("", "", "", "", new String[] {}, 0);

内部

for (int temp = 0; temp < nList.getLength(); temp++) {