1.导入dom4j-1.6.1.jar
2.导入jaxen-1.1.1.jar
package com.hwp.test;

import java.io.*;
import java.util.*;

import org.dom4j.*;
import org.dom4j.io.*;


/** *//**
* @author 惠万鹏
*
*/
public class XmlTest


{

/** *//**
* <p>
* 写XML文件
* </p>
*
* @param fileName
* 文件名
* @param document
* 文档
* @return isWritedSuccessful 写XML是否成功
*/
public static boolean writeXML(String fileName, Document document)

{
boolean isWritedSuccessful = false;
XMLWriter writer = null;
try

{
OutputFormat format = OutputFormat.createPrettyPrint();
format.setEncoding("UTF-8");
writer = new XMLWriter(new FileOutputStream(fileName), format);
writer.write(document);
isWritedSuccessful = true;
}
catch (Exception e)

{
e.printStackTrace();
}
finally

{
if (writer != null)

{
try

{
writer.close();
}
catch (Exception e)

{
e.printStackTrace();
}
}
}
return isWritedSuccessful;
}

/** *//**
* <p>
* 根据文件名创建XML
* </p>
*
* @param fileName
* 文件名
* @return 是否创建成功
*/
public static boolean createStudentXML(String fileName)

{
Document document = DocumentHelper.createDocument();
document.addComment("99级1班学生信息");
document.addElement("students");
return XmlTest.writeXML(fileName, document);
}

/** *//**
* <p>
* 根据文件名得到Document
* </p>
*
* @param fileName
* 文件名
* @return document
*/
public static Document getStudentXMLDocument(String fileName)

{
SAXReader saxReader = new SAXReader();
try

{
return saxReader.read(new File(fileName));
}
catch (Exception e)

{
e.printStackTrace();
}
return null;
}

/** *//**
* <p>
* 向XML里插入一条信息
* </p>
*
* @param fileName
* @param id
* @param name
* @return
*/
public static boolean addStudentInfo(String fileName, String id, String name)

{
Document document = XmlTest.getStudentXMLDocument(fileName);
if (document == null)

{
return false;
}
Element eStudents = document.getRootElement();
Element eStudent = eStudents.addElement("student");
eStudent.addAttribute("id", id);
Element eName = eStudent.addElement("name");
eName.setText(name);
return XmlTest.writeXML(fileName, document);
}

/** *//**
* <p>
* 根据id删除相应的student信息
* </p>
*
* @param fileName
* 文件名
* @param id
* studentId
* @return
*/
public static boolean deleteStudentInfo(String fileName, String id)

{
boolean isDeleteSuccessful = false;
Document document = XmlTest.getStudentXMLDocument(fileName);
if (document == null)

{
return false;
}
List list = document.selectNodes("/students/student[@id='" + id + "']");
System.out.println(list);
if (list != null)

{
Iterator it = list.iterator();
while (it.hasNext())

{
Element eStudent = (Element) it.next();
if (eStudent != null)

{
eStudent.getParent().remove(eStudent);
}
isDeleteSuccessful = document.remove(eStudent);
}
}
if (isDeleteSuccessful)

{
return XmlTest.writeXML(fileName, document);
}
return isDeleteSuccessful;
}

/** *//**
* <p>
* 解析xml
* </p>
*
* @param fileName
* 文件名
* @return
*/
public static List<ArrayList<String>> getStudentInfo(String fileName)

{
List<ArrayList<String>> students = null;
students = new ArrayList<ArrayList<String>>();
Document document = XmlTest.getStudentXMLDocument(fileName);
List eStudentList = document.selectNodes("/students/*");
if (eStudentList != null)

{
Iterator itEStudentList = eStudentList.iterator();
ArrayList<String> student = null;
while (itEStudentList.hasNext())

{
student = new ArrayList<String>();
Element eStudent = (Element) itEStudentList.next();
student.add(eStudent.attributeValue("id"));
student.add(eStudent.element("name").getTextTrim());
students.add(student);
}
}
System.out.println(students);
return students;
}
public static void main(String args[])

{
String fileName = "c:/stu.xml";
XmlTest.createStudentXML(fileName);
for(int i=0;i<10;i++)
XmlTest.addStudentInfo(fileName,String.valueOf(i),"惠万鹏" + i);
//XmlTest.deleteStudentInfo(fileName,"4");
XmlTest.getStudentInfo(fileName);
}
}
2.导入jaxen-1.1.1.jar







































































































































































































































































