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dom4j 操作 XML

1.導入dom4j-1.6.1.jar
2.導入jaxen-1.1.1.jar

package com.hwp.test;

import java.io.*;

import java.util.*;

import org.dom4j.*;

import org.dom4j.io.*;

/**

* @author 惠萬鵬

public class XmlTest

{

/**

*

* 寫XML文件

*

* @param fileName

* 文件名

* @param document

* 文檔

* @return isWritedSuccessful 寫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;

}

/**

*

* 根據文件名創建XML

*

* @param fileName

* 文件名

* @return 是否創建成功

public static boolean createStudentXML(String fileName)

{

Document document = DocumentHelper.createDocument();

document.addComment("99級1班學生信息");

document.addElement("students");

return XmlTest.writeXML(fileName, document);

}

/**

*

* 根據文件名得到Document

*

* @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;

}

/**

*

* 向XML里插入一條信息

*

* @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);

}

/**

*

* 根據id刪除相應的student信息

*

* @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;

}

/**

*

* 解析xml

*

* @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),"惠萬鵬" + i);

//XmlTest.deleteStudentInfo(fileName,"4");

XmlTest.getStudentInfo(fileName);

}

posted on 2008-06-16 21:18 HUIKK 閱讀(507) 評論(0) 編輯收藏所屬分類: XML

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