dom4j 解析xml 跟包装xml

dom4j 解析xml 和包装xml

将xml解析：

import java.io.File;
import java.util.HashMap;
import java.util.Iterator;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

/**
* 利用dom4j进行XML编程
*
* @author cuiweibing
* @since 2007.8.10
*/
public class Dom4jReadExmple {
??? /**
???? * 遍历整个XML文件，获取所有节点的值与其属性的值，并放入HashMap中
???? *
???? * @param filename
???? *??????????? String 待遍历的XML文件（相对路径或者绝对路径）
???? * @param hm
???? *??????????? HashMap 存放遍历结果，格式：<nodename,nodevalue>或者<nodename+attrname,attrvalue>
???? */
??? public void iterateWholeXML(String filename, HashMap<String, String> hm) {
??????? SAXReader saxReader = new SAXReader();
??????? try {
??????????? Document document = saxReader.read(new File(filename));
??????????? Element root = document.getRootElement();
??????????? // 用于记录学生编号的变量
??????????? int num = -1;
??????????? // 遍历根结点（students）的所有孩子节点（肯定是student节点）
??????????? for (Iterator iter = root.elementIterator(); iter.hasNext();) {
??????????????? Element element = (Element) iter.next();
??????????????? num++;
??????????????? // 获取person节点的age属性的值
??????????????? Attribute ageAttr = element.attribute("age");
??????????????? if (ageAttr != null) {
??????????????????? String age = ageAttr.getValue();
??????????????????? if (age != null && !age.equals("")) {
??????????????????????? hm.put(element.getName() + "-" + ageAttr.getName()+ num, age);
??????????????????? } else {
??????????????????????? hm.put(element.getName() + "-" + ageAttr.getName()+ num, "20");
??????????????????? }
??????????????? } else {
??????????????????? hm.put(element.getName() + "-age" + num, "20");
??????????????? }
??????????????? // 遍历student结点的所有孩子节点（即name，college，telphone，notes），并进行处理
??????????????? for (Iterator iterInner = element.elementIterator(); iterInner
??????????????????????? .hasNext();) {
??????????????????? Element elementInner = (Element) iterInner.next();
??????????????????? if (elementInner.getName().equals("college")) {
??????????????????????? hm.put(elementInner.getName() + num, elementInner.getText());
??????????????????????? // 获取college节点的leader属性的值
??????????????????????? Attribute leaderAttr = elementInner.attribute("leader");
??????????????????????? if (leaderAttr != null) {
??????????????????????????? String leader = leaderAttr.getValue();
??????????????????????????? if (leader != null && !leader.equals("")) {
??????????????????????????????? hm.put(elementInner.getName() + "-"+ leaderAttr.getName() + num, leader);
??????????????????????????? } else {
??????????????????????????????? hm.put(elementInner.getName() + "-"+ leaderAttr.getName() + num, "leader");
??????????????????????????? }
??????????????????????? } else {
??????????????????????????? hm.put(elementInner.getName() + "-leader" + num,"leader");
??????????????????????? }
??????????????????? } else {
??????????????????????? hm.put(elementInner.getName() + num, elementInner.getText());
??????????????????? }
??????????????? }
??????????? }

??????? } catch (DocumentException e) {
??????????? // TODO Auto-generated catch block
??????????? e.printStackTrace();
??????? }
??? }
}


包装：

package com.xml;

import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

public class Dom4JXML {

public void createXML() {
//用工厂类创建一个document实例
Document doc = DocumentHelper.createDocument();
//创建根元素emps
Element rootEle = doc.addElement("emps");
//添加注释
rootEle.addComment("这是一个dom4j生成的xml文件");
//emps根节点下创建一个emp节点
Element empEle = rootEle.addElement("emp");
//emp添加属性id="1"
empEle.addAttribute("id", "1");
//emp节点下创建一个name节点
Element nameEle = empEle.addElement("name");
//name节点下创建一个文本节点zhangsan
nameEle.setText("zhangsan");
//再为name节点创建一个兄弟节点
Element sexEle = empEle.addElement("sex");
sexEle.setText("man");
//将document中的内容写入文件中
try {
Writer out = new FileWriter("F:\\emps.xml");
//格式化输出,类型IE浏览一样
OutputFormat format = OutputFormat.createPrettyPrint();
//OutputFormat format = OutputFormat.createCompactFormat();
format.setEncoding("UTF-8");
//创建写出对象
XMLWriter writer = new XMLWriter(out,format);
writer.write(doc);
writer.close();
System.out.println("生成emps.xml成功。");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("失败了。");
}
}
public static void main(String[] args) {
new Dom4JXML().createXML();
}

}

文档内容：
<?xml version="1.0" encoding="UTF-8"?>

<emps>
? <!--这是一个dom4j生成的xml文件-->
? <emp id="1">
??? <name>zhangsan </name>
??? <sex>man </sex>
? </emp>
</emps>

?

?

?

3.

?

解析code属性：

public static String getCode(String filename){
? InputStream readerXml = FilePath.class.getResourceAsStream(filename);
? String btsNum = null;
? SAXReader saxReader = new SAXReader();
??????? try {
??????????? Document document = saxReader.read(readerXml);
??????????? Element root = document.getRootElement();
??????????? int num = -1;
??????????? for (Iterator iter = root.elementIterator(); iter.hasNext();) {
??????????????? Element element = (Element) iter.next();
??????????????? num++;
??????????????? Attribute CodeAttr = element.attribute("code");
??????????????? if (CodeAttr != null) {
??????????????????? btsNum = CodeAttr.getValue();???????????????????
??????????????? }
??????????? }
??????? } catch (DocumentException e) {
??????????? e.printStackTrace();
??????? }
??????? return btsNum;
?}