public class StudentBean {
private String sex; file://学生性别
private String name; file://学生姓名
private int age; file://学生年龄
private String phone; file://电话号码
public void setSex(String s) {
sex = s;
}
public void setName(String s) {
name = s;
}
public void setAge(int a) {
age = a;
}
public void setPhone(String s) {
phone = s;
}
public String getSex() {
return sex;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public String getPhone() {
return phone;
}
}
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);
}
file://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();
file://取"学生"元素列表
NodeList students = root.getElementsByTagName("学生");
for (int i = 0; i < students.getLength(); i++) {
file://依次取每个"学生"元素
Element student = (Element) students.item(i);
file://创建一个学生的Bean实例
StudentBean studentBean = new StudentBean();
file://取学生的性别属性
studentBean.setSex(student.getAttribute("性别"));
file://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());
}
file://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");
file://根元素添加上文档
doc.appendChild(root);
file://取学生信息的Bean列表
for (int i = 0; i < student_Vector.size(); i++) {
file://依次取每个学生的信息
StudentBean studentBean = (StudentBean) student_Vector.get(i);
file://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);
file://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);
}
file://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();
}
最后加入测试主函数,如下:
public static void main(String[] args) throws Exception {
file://建立测试实例
XMLTest xmlTest = new XMLTest();
file://初始化向量列表
xmlTest.student_Vector = new Vector();