import java.util.*;
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import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.io.*;
import org.apache.crimson.tree.XmlDocument;
class Configure{
private ArrayListstudent_Vector =new ArrayList();
void readXMLFile(String inFile)throws Exception {
//为解析XML作准备
//创建DocumentBuilderFactory实例,指定DocumentBuilder
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db =null;
try {
db = dbf.newDocumentBuilder();
}catch (ParserConfigurationException pce) {
System.err.println(pce);
//出异常时输出异常信息，然后退出，下同
System.exit(1);
}
Document doc =null;
try {
doc = db.parse(inFile);
}catch (DOMException dom) {
System.err.println(dom.getMessage());
System.exit(1);
}catch (IOException ioe) {
System.err.println(ioe);
System.exit(1);
}
//下面是解析XML的全过程，
//比较简单，先取根元素”学生花名册”
Element root = doc.getDocumentElement();
//取”学生”元素列表
NodeList students = root.getElementsByTagName("学生");
for (int i = 0; i < students.getLength(); i++) {
//依次取每个”学生”元素
Element student = (Element) students.item(i);
//创建一个学生的Bean实例
StudentBean studentBean =new StudentBean();
//取学生的性别属性
studentBean.setSex(student.getAttribute("性别"));
//取”姓名”元素，下面类同
NodeList names = student.getElementsByTagName("姓名");
if (names.getLength() == 1) {
Element e = (Element) names.item(0);
Text t = (Text) e.getFirstChild();
studentBean.setName(t.getNodeValue());
}
NodeList ages = student.getElementsByTagName("年龄");
if (ages.getLength() == 1) {
Element e = (Element) ages.item(0);
Text t = (Text) e.getFirstChild();
studentBean.setAge(Integer.parseInt(t.getNodeValue()));
}
NodeList phones = student.getElementsByTagName("电话");
if (phones.getLength() == 1) {
Element e = (Element) phones.item(0);
Text t = (Text) e.getFirstChild();
studentBean.setPhone(t.getNodeValue());
}
student_Vector.add(studentBean);
}
}
publicvoid writeXMLFile(String outFile)throws Exception {
//为解析XML作准备，
//创建DocumentBuilderFactory实例,指定DocumentBuilder
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db =null;
try {
db = dbf.newDocumentBuilder();
}catch (ParserConfigurationException pce) {
System.err.println(pce);
System.exit(1);
}
Document doc =null;
doc = db.newDocument();
//下面是建立XML文档内容的过程，
//先建立根元素”学生花名册”
Element root = doc.createElement("学生花名册");
//根元素添加上文档
doc.appendChild(root);
//取学生信息的Bean列表
for (int i = 0; i
//依次取每个学生的信息
StudentBean studentBean = (StudentBean)student_Vector.get(i);
//建立”学生”元素，添加到根元素
Element student = doc.createElement("学生");
student.setAttribute("性别", studentBean.getSex());
root.appendChild(student);
//建立”姓名”元素，添加到学生下面，下同
Element name = doc.createElement("姓名");
student.appendChild(name);
Text tName = doc.createTextNode(studentBean.getName());
name.appendChild(tName);
Element age = doc.createElement("年龄");
student.appendChild(age);
Text tAge = doc.createTextNode(String.valueOf(studentBean.getAge()));
age.appendChild(tAge);
Element phone = doc.createElement("电话");
student.appendChild(phone);
Text tPhone = doc.createTextNode(studentBean.getPhone());
phone.appendChild(tPhone);
}
//把XML文档输出到指定的文件
FileOutputStream outStream =new FileOutputStream(outFile);
OutputStreamWriter outWriter =new OutputStreamWriter(outStream);
((XmlDocument) doc).write(outWriter,"GB2312");
outWriter.close();
outStream.close();
}
publicstaticvoid main(String[] args)throws Exception
{
Configure cfg =new Configure();
cfg.readXMLFile("s1.xml");
cfg.writeXMLFile("s2.xml");
}
}
class StudentBean {
private Stringsex;//学生性别
private Stringname;//学生姓名
privateintage;//学生年龄
private Stringphone;//电话号码
publicint getAge() {
returnage;
}
publicvoid setAge(int age) {
this.age = age;
}
public String getName() {
returnname;
}
publicvoid setName(String name) {
this.name = name;
}
public String getPhone() {
returnphone;
}
publicvoid setPhone(String phone) {
this.phone = phone;
}
public String getSex() {
returnsex;
}
publicvoid setSex(String sex) {
this.sex = sex;
}
}
附：
<学生花名册>
<学生性别 = "男">
<姓名>李华
<年龄>14
<电话>6287555
<学生性别 = "男">
<姓名>张三
<年龄>16
<电话>8273425
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