Java 我怎样才能从 NodeList 转换为 Array 并在其他类中使用这个 Array？
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How could I convert from NodeList to Array and work with this Array in others class?
提问by Sallyerik
I trying to work with a XML file from where a get a list of IPs and subnets, after that I want to check if those IP are within of a subnet.
我尝试使用 XML 文件，从中获取 IP 和子网列表，然后我想检查这些 IP 是否在子网内。
QueryXML getNodes = new QueryXML(Queries);
NodeList IPs = getNodes.query();
QueryXML getSubnets = new QueryXML(Queries1);
NodeList subnets = getSubnets.query();
At this point, I already have my NodeList with each element from the XML file (Ips & subnets), but my problem now is that, I would like to convert those NodeList to Array and so, use the following element which is calling a constructur with two arrays as a parameter.
在这一点上，我已经有了来自 XML 文件（Ips 和子网）的每个元素的 NodeList，但我现在的问题是，我想将这些 NodeList 转换为数组，因此，使用以下调用构造函数的元素以两个数组作为参数。
SubnetUtilsExample findobjects = new SubnetUtilsExample(IPs, subnets);
I googled it but i didnt find a right way. Could somebody help me with that?
我用谷歌搜索，但我没有找到正确的方法。有人可以帮我吗？
Thanks.
谢谢。
采纳答案by Sallyerik
I've tried creating my own method but ufortunatelly I couldnt fix it on this way.
我尝试创建自己的方法，但不幸的是我无法以这种方式修复它。
Finally what I did is create an ArrayList and inlcude the NodeValue of each item in the Array. Then, now I have an Arraylist with all items from my QueryXML ready to use.
最后我所做的是创建一个 ArrayList 并包含 Array 中每个项目的 NodeValue。然后，现在我有一个 Arraylist，其中包含我的 QueryXML 中的所有项目可供使用。
Final code:
最终代码：
ArrayList<String> IPtable=new ArrayList<String>();
QueryXML getNodes = new QueryXML(Queries);
NodeList IPs = getNodes.query();
for (int n=0; n<IPs.getLength();n++){
String ip =IPs.item(n).getNodeValue();
IPtable.add(ip);
}
ArrayList<String> IPSubnet=new ArrayList<String>();
QueryXML getSubnets = new QueryXML(Queries1);
NodeList subnets = getSubnets.query();
for (int s=0; s<subnets.getLength();s++){
String subnet =subnets.item(s).getNodeValue();
IPSubnet.add(subnet);
}
I'm not sure that It's the right way, but at less it works properlly and fast. I hope it'll useful for somebody else.
我不确定这是正确的方法，但至少它可以正常快速地工作。我希望它对其他人有用。
回答by Micky Q
You can also convert Nodelist to Array List by Simply adding this piece of code
您还可以通过简单地添加这段代码将节点列表转换为数组列表
var getNodesArray = [].slice.call(IPs);
var getNodesArray = [].slice.call(IPs);
console.log(getNodesArray);
控制台日志（getNodesArray）；
回答by KeyMaker00
Since Java 8, you can work with IntStream and map, where nodeList is instance of NodeList:
从 Java 8 开始，您可以使用 IntStream 和 map，其中 nodeList 是 的实例NodeList：
List<Node> nodes = IntStream.range(0, nodeList.getLength())
.mapToObj(nodeList::item)
.collect(Collectors.toList());
