将xml dom解析为对象 [英] Parse xml dom to an object
本文介绍了将xml dom解析为对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何用此类对象填充数组?
How can I fill an array with such object?
class Sam{
String id;
String type;
String data;
}
来自xml结构:
<Table name="Sam">
<Row id="374058">
<Col name="ID.1">374058</Col>
<Col name="TYPE.1">mob</Col>
</Row>
<Row id="374059">
<Col name="ID.1">374059</Col>
<Col name="TYPE.1">ff</Col>
</Row>
</Table>
找到了这样的表"但是接下来我该如何从行"中收集数据呢?
Found such "Table" but what i shoud do next to collect data from "Row"?
List<Sam> samList = new new ArrayList<>();
NodeList nameNodeList = xml.getDocumentElement().getElementsByTagName("Table");
if (nameNodeList != null) {
for (int i = 0; i < nameNodeList.getLength(); i++) {
Node node = nameNodeList.item(i);
if (node.getAttributes().getNamedItem("name").getNodeValue().equals("Sam") &&
node.getNodeType() == Node.ELEMENT_NODE) {
Element element = (Element) node;
//what should i do next, how can i fined ID,TYPE,DATA?
}
}
}
推荐答案
尝试一下.我尝试对问题进行编码,并获得以下输出.这段代码解析您的XML并构造Sam对象.
Try this one. I try to code the problem and get the following output. This code parses your XML and constructs the Sam object.
代码:
import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.NodeList;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;
public class XmlParse {
public static void main(String[] args) {
XmlParse xmlParse = new XmlParse();
xmlParse.xmlToObj();
}
public void xmlToObj() {
try {
File inputFile = new File("sam.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
System.out.println("Root element: " + doc.getDocumentElement().getNodeName());
NodeList nodeList = doc.getElementsByTagName("Row");
Node node = null;
List<Sam> samList = new ArrayList<>();
if(nodeList != null && nodeList.getLength() > 0) {
for(int i=0; i < nodeList.getLength(); i++) {
node = nodeList.item(i);
NodeList innerNodeList = doc.getElementsByTagName("Col");
Node innerNodeID = innerNodeList.item(0);
Node innerNodeType = innerNodeList.item(1);
String id = innerNodeID.getTextContent();
String type = innerNodeType.getTextContent();
Sam sam = new Sam(id, type, null);
System.out.println(sam.toString());
samList.add(sam);
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
class Sam {
String id;
String type;
String data;
public Sam(String id, String type, String data) {
this.id = id;
this.type = type;
this.data = data;
}
@Override
public String toString() {
return "Sam [id=" + id + ", type=" + type + ", data=" + data + "]";
}
}
输出:
Root element: Table
Sam [id=374058, type=mob, data=null]
Sam [id=374058, type=mob, data=null]
输入:sam.xml
input : sam.xml
<Table name="Sam">
<Row id="374058">
<Col name="ID">374058</Col>
<Col name="TYPE">mob</Col>
</Row>
<Row id="374059">
<Col name="ID">374059</Col>
<Col name="TYPE">ff</Col>
</Row>
</Table>
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