求java操作xml文件的例子代码

[lona]

我想用xml文件当文件型数据库
听说数据量大的时候，xml文件速度挺快的 1
但是想知道java代码怎么样操作xml文件的
求代码

[zhzhl0]

1． 准备工作：去java.sun.com下载org.w3c.dom包,将下载的包放在WEB-INF/lib目录下。包的文档说明可以参考http://java.sun.com/xml/jaxp/dist/1.1/docs/api/org/w3c/dom/package-summary.html。

2． 本案主要功能是完成table的表头显示字段的设置。

文件包括：

1） print.xml：将字段属性写入xml文件（放入web-inf目录下）

2） ReadWritePrintXML.java ：print.xml的接口类：

3） PrintReadAction.java ：print.xml的Action

4）PrintSetAction.java：写print.xml的Action

5) PrintForm：print选择的对象ActionForm


/****************print.xml代码begin******************************************/

<?xml version="1.0" encoding="UTF-8" ?>

<TBL_EMPLOYEE>

<Field fieldName="employeeId" printName="职工ID">

<ifPrint>0</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.deptName" printName="部门">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.employeeName" printName="职工姓名">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.sex" printName="性别">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.nation" printName="民族">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.birthDate" printName="出生日期">

<ifPrint>0</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.ages" printName="年龄">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.workYear" printName="工龄">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.idCard" printName="身份证号">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.workDate" printName="参加工作时间">

<ifPrint>0</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.politic" printName="政治面貌">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="employeeBasicInfo.parchment" printName="文化程度">

<ifPrint>1</ifPrint>

</Field>

<Field fieldName="nativePlace" printName="籍贯">

<ifPrint>0</ifPrint>

</Field>

<Field fieldName="registerPlace" printName="户口所在地">

<ifPrint>0</ifPrint>

</Field>

<Field fieldName="telephone" printName="联系电话">

<ifPrint>0</ifPrint>

</Field>

<Field fieldName="houseAddress" printName="家庭住址">

<ifPrint>0</ifPrint>

</Field>

</TBL_EMPLOYEE>

/**********************print.xml代码end***************************************/

[zhzhl0]

/**********************PrintForm.java Begin***************************************/

package test;



import org.apache.struts.action.*;

import javax.servlet.http.*;

/**

* 打印form

*/

public class PrintForm extends ActionForm {

/**字段名*/

private String fieldName="";

/**打印名*/

private String printName="";

/**是否打印*/

private int ifPrint=0;

public void setFieldName(String fieldName) {

this.fieldName = fieldName;

}

public String getFieldName() {

return fieldName;

}

public void setPrintName(String printName) {

this.printName = printName;

}

public String getPrintName() {

return printName;

}

public void setIfPrint(int ifPrint) {

this.ifPrint = ifPrint;

}

public int getIfPrint() {

return ifPrint;

}


public ActionErrors validate(ActionMapping actionMapping, HttpServletRequest httpServletRequest) {

/**@todo: finish this method, this is just the skeleton.*/

return null;

}

public void reset(ActionMapping actionMapping, HttpServletRequest httpServletRequest) {

}

}

/****************printForm.java代码end******************************/

[zhzhl0]

/****************ReadWritePrintXML.java代码Begin******************************/

package test;

import java.io.*;

import java.util.*;

import javax.xml.parsers.*;

import org.w3c.dom.*;

import org.apache.crimson.tree.XmlDocument;

import javax.xml.transform.*;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

/**

* 读写printxml

*/

public class ReadWritePrintXML {

/**

* 读printxml

* @param path:the path of xml put in

* @return

* @throws Exception

*/

public ArrayList readXMLFile(String path) throws Exception {

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

DocumentBuilder db = null;

ArrayList list = new ArrayList();

String[] data = null;

try {

db = dbf.newDocumentBuilder();

}

catch (ParserConfigurationException pce) {

pce.printStackTrace();

}

Document doc = null;

try {

doc = db.parse(path);

}

catch (DOMException dom) {

dom.printStackTrace();

}

catch (IOException ioe) {

ioe.printStackTrace();

}

Element root = doc.getDocumentElement();

NodeList fields = root.getElementsByTagName("Field");

for (int i = 0; i < fields.getLength(); i++) {

Element field = (Element) fields.item(i);

PrintSelectForm printSelectForm = new PrintSelectForm();

printSelectForm.setFieldName(field.getAttribute("fieldName"));

printSelectForm.setPrintName(field.getAttribute("printName"));

NodeList datas = field.getElementsByTagName("ifPrint");

if (datas.getLength() == 1) {

Element e = (Element) datas.item(0);

Text t = (Text) e.getFirstChild();

printSelectForm.setIfPrint(t.getNodeValue());

}

list.add(printSelectForm);

}

return list;

}

/**

* 写xml

* @param select:the selected id you set

* @param path:the path of xml put in

* @throws Exception

*/

public void writeXMLFile(String[] select, String path) throws Exception {

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

DocumentBuilder db = null;

try {

db = dbf.newDocumentBuilder();

}

catch (ParserConfigurationException pce) {

pce.printStackTrace();

}

Document doc = null;

try {

doc = db.parse(path);

}

catch (DOMException dom) {

dom.printStackTrace();

}

catch (IOException ioe) {

ioe.printStackTrace();

}

Element root = doc.getDocumentElement();

NodeList fields = root.getElementsByTagName("Field");

for (int j = 0; j < select.length; j++) {

for (int i = 0; i < fields.getLength(); i++) {

Element field = (Element) fields.item(i);

if (field.getAttribute("fieldName").equals(select[j])) {

NodeList ifPrints = field.getElementsByTagName("ifPrint");

if (ifPrints.getLength() == 1) {

Element e = (Element) ifPrints.item(0);

Text t = (Text) e.getFirstChild();

t.setNodeValue("1");

}

}

}

}

TransformerFactory tFactory = TransformerFactory.newInstance();

Transformer transformer = tFactory.newTransformer();

DOMSource source = new DOMSource(doc);

StreamResult result = new StreamResult(new java.io.File(path));

transformer.transform(source, result);

}

/**

* 初始化xml

* @param path:the path of xml

* @throws Exception

*/

public void initialXMLFile(String path) throws Exception {

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

DocumentBuilder db = null;

try {

db = dbf.newDocumentBuilder();

}

catch (ParserConfigurationException pce) {

pce.printStackTrace();

}

Document doc = null;

try {

doc = db.parse(path);

}

catch (DOMException dom) {

dom.printStackTrace();

}

catch (IOException ioe) {

ioe.printStackTrace();

}

Element root = doc.getDocumentElement();

NodeList fields = root.getElementsByTagName("Field");

for (int i = 0; i < fields.getLength(); i++) {

Element field = (Element) fields.item(i);

NodeList ifPrints = field.getElementsByTagName("ifPrint");

if (ifPrints.getLength() == 1) {

Element e = (Element) ifPrints.item(0);

Text t = (Text) e.getFirstChild();

t.setNodeValue("0");

}

}

TransformerFactory tFactory = TransformerFactory.newInstance();

Transformer transformer = tFactory.newTransformer();

DOMSource source = new DOMSource(doc);

StreamResult result = new StreamResult(new java.io.File(path));

transformer.transform(source, result);

}

}

/****************ReadWritePrintXML.java代码End********************************/

[liyx326]

学习！

[jimever]

有用SAX读取的例子吗

[MARS.nEIL]

学习.帮顶.

[lona]

快看看，经典！

[medusagjf]

不用那么复杂吧,去下载jdom包导入,里面提供读取的sample,而且才几行代码,效率超高