xml文件
<?xml version="1.0" encoding="utf-8"?>
<Accounts>
<Account type="type1">
<code>100001</code>
<pass>123</pass>
<name>张三</name>
<money>1000000.00</money>
</Account>
<Account type="type2">
<code>100002</code>
<pass>123</pass>
<name>李四</name>
<money>1000.00</money>
</Account>
</Accounts>
java文件
package dom;
import java.io.*;
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 Dom {
public static void main(String arge[]) {
Element element = null;
// 可以使用绝对路劲
File f = new File("dom/book.xml");
// documentBuilder为抽象不能直接实例化(将XML文件转换为DOM文件)
DocumentBuilder db = null;
DocumentBuilderFactory dbf = null;
try {
// 返回documentBuilderFactory返回工厂对象
dbf = DocumentBuilderFactory.newInstance();
// 返回db对象用documentBuilderFatory对象获得返回documentBuildr对象
db = dbf.newDocumentBuilder();
// 得到一个DOM并返回给document对象
Document dt = db.parse(f);
// 得到一个elment根元素
element = dt.getDocumentElement();
// 输出根元素的name
System.out.println("根元素:" + element.getNodeName());//Accounts
// 获得根元素下的子节点
NodeList childNodes = element.getChildNodes();
// 遍历根节点下的所有子节点
for (int i = 0; i < childNodes.getLength(); i++) {//5 #text Account #text Account #text 会把回车算成子节点,实际只有两个子节点
// 获得每个对应位置i的结点
Node node1 = childNodes.item(i);
System.out.println("分别是="+node1.getNodeName());
if ("Account".equals(node1.getNodeName())) {
// 如果节点的名称为"Account",则输出Account元素属性type
//NamedNodeMap nnm = node1.getAttributes()的返回值是NamedNodeMap对象
//通过节点名称返回结点对象Node node = getNamedItem("type")
//getNodeValue()返回的是xml节点的值
System.out.println("\r\n找到一篇账号. 所属区域: "
+ node1.getAttributes().getNamedItem("type")
.getNodeValue() + ". ");
// 获得<Accounts>下的节点
NodeList nodeDetail = node1.getChildNodes();
// 遍历<Accounts>下的节点
for (int j = 0; j < nodeDetail.getLength(); j++) {//9 #text code #text pass #text name #text money #text
// 获得<Accounts>元素每一个节点
Node detail = nodeDetail.item(j);
if ("code".equals(detail.getNodeName())) // 输出code
System.out
.println("卡号: " + detail.getTextContent());
else if ("pass".equals(detail.getNodeName())) // 输出pass
System.out
.println("密码: " + detail.getTextContent());
else if ("name".equals(detail.getNodeName())) // 输出name
System.out
.println("姓名: " + detail.getTextContent());
else if ("money".equals(detail.getNodeName())) // 输出money
System.out
.println("余额: " + detail.getTextContent());
}
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
XML文件
<?xml version="1.0" encoding="UTF-8"?>
<RESULT>
<VALUE >
<NO>A1234</NO>
<ADDR>河南省郑州市</ADDR>
</VALUE>
<VALUE>
<NO>B1234</NO>
<ADDR>河南省郑州市二七区</ADDR>
</VALUE>
</RESULT>
java文件
package dom4J;
import java.io.*;
import java.util.*;
import org.dom4j.*;
import org.dom4j.io.*;
public class Test {
public static void main(String arge[]) {
try {
File f = new File("dom4J/a.xml");
SAXReader reader = new SAXReader();
//得到Document对象
Document doc = reader.read(f);
//获得根节点
Element root = doc.getRootElement();
Element foo;
//elementIterator从根节点遍历子节点
Iterator i = root.elementIterator("VALUE");
while(i.hasNext()){
//for (Iterator i = root.elementIterator("VALUE"); i.hasNext();) {
foo = (Element) i.next();
//得到节点的内容
System.out.print("车牌号码:" + foo.elementText("NO"));
System.out.println("车主地址:" + foo.elementText("ADDR"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
XML和上面相同,java代码如下
package jdom;
import java.io.File;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
public class Test {
public static void main(String arge[]) {
try {
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(new File("jdom/a.xml"));
Element foo = doc.getRootElement();
List allChildren = foo.getChildren();
for (int i = 0; i < allChildren.size(); i++) {
System.out.print("车牌号码:"
+ ((Element) allChildren.get(i)).getChild("NO")
.getText());
System.out.println("车主地址:"
+ ((Element) allChildren.get(i)).getChild("ADDR")
.getText());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
注意:2,3方法需要引入相对应的jar包使用