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在JSP开发中使用jdom解析临时存放数据的XML文件

2005-02-15 08:00:00 作者：来源：互联网浏览次数：0 文字大小：【大】【中】【小】

简介：在我工作过程中,遇到了对临时存储产品信息的XML文件进行操作的问题.其中就有对XML文件的解析操作,考虑到用DOM或SAX比较麻烦,于是我选择了用jdom进行解析.因为我的XML文件结构比较简单,仅有两层,而且没有复杂的属...

关键字：临时文件数据开发 jdom XML JSP

在我工作过程中,遇到了对临时存储产品信息的XML文件进行操作的问题.其中就有对XML文件的解析操作,考虑到用DOM或SAX比较麻烦,于是我选择了用jdom进行解析.因为我的XML文件结构比较简单,仅有两层,而且没有复杂的属性,所以没有用到里面太多的方法,只希望能够抛砖引玉,给初学者一点帮助.

下面我就把大概的实现过程说一说.

一.实现解析xml文件的JavaBean(XMLBean):

我把对存放产品信息的xml文档的全部操作都写在了XMLBean()里面,包括添加,修改,删除一条记录,查看相关记录等操作.具体实现的代码如下:

package xml;

import java.io.*;

import java.util.*;

import org.jdom.*;

import org.jdom.output.*;

import org.jdom.input.*;

import javax.servlet.*;

import javax.servlet.http.*;

/**

Title:XMLBean

Description:

* @author lihs

* @version 1.0

**/

**通过往XML文件里面添加,删除，修改记录。从而实现对生产部门提交产品信息的处理。

public class XMLBean{

private String ProduceID,ProduceName,ProduceClass,ProduceType,ProduceColor,Baozhiqi,ProduceNum,ProduceDep,ProduceDate;

public String getProduceID() { return ProduceID;}

public String getProduceName() { return ProduceName;}

public String getProduceClass() { return ProduceClass;}

public String getProduceType() { return ProduceType;}

public String getProduceColor() { return ProduceColor;}

public String getBaozhiqi() { return Baozhiqi;}

public String getProduceNum() { return ProduceNum;}

public String getProduceDep() { return ProduceDep;}

public String getProduceDate() { return ProduceDate;}

public void setProduceID(String produceid) { this.ProduceID =produceid ; }

public void setProduceName(String producename) { this.ProduceName =producename; }

public void setProduceClass(String produceclass) { this.ProduceClass =produceclass ; }

public void setProduceType(String producetype) { this.ProduceType =producetype ; }

public void setProduceColor(String producecolor) { this.ProduceColor =producecolor ; }

public void setBaozhiqi(String baozhiqi) { this.Baozhiqi =baozhiqi ; }

public void setProduceNum(String producenum) { this.ProduceNum =producenum ; }

public void setProduceDep(String producedep) { this.ProduceDep =producedep ; }

public void setProduceDate(String producedate) { this.ProduceDate =producedate ; }

public XMLBean(){}

/**

* 通过传入路径读取XML文件的内容。

public Vector LoadXML(String path)throws Exception{

Vector xmlVector = null;

FileInputStream fi = null;

try{

fi = new FileInputStream(path);

xmlVector = new Vector();

SAXBuilder sb = new SAXBuilder();

Document doc = sb.build(fi);

Element root = doc.getRootElement(); //获取根节点

List produces = root.getChildren(); //获取根节点下面的所有子元素

Element produce =null;

XMLBean xml =null;

for(int i=0;i

xml = new XMLBean();

produce = (Element)produces.get(i ); //取得指定的孩子节点信息

xml.setProduceID(produce.getChild("ProduceID").getText());

xml.setProduceName(produce.getChild("ProduceName").getText());

xml.setProduceClass(produce.getChild("ProduceClass").getText());

xml.setProduceType(produce.getChild("ProduceType").getText());

xml.setProduceColor(produce.getChild("ProduceColor").getText());

xml.setBaozhiqi(produce.getChild("Baozhiqi").getText());

xml.setProduceNum(produce.getChild("ProduceNum").getText());

xml.setProduceDep(produce.getChild("ProduceDep").getText());

xml.setProduceDate(produce.getChild("ProduceDate").getText());

xmlVector.add(xml);

}

catch(Exception e){

System.err.println(e+"error");

}

finally{

try{

fi.close();

}

catch(Exception e){

e.printStackTrace();

}

return xmlVector;

}

/**

* 删除指定的元素信息

public static void DelXML(HttpServletRequest request)throws Exception{

FileInputStream fi = null;

FileOutputStream fo = null;

try{

String path=request.getParameter("path");

int xmlid=Integer.parseInt(request.getParameter("id"));

fi = new FileInputStream(path);

SAXBuilder sb = new SAXBuilder();

Document doc = sb.build(fi);

Element root = doc.getRootElement();

List produces = root.getChildren();

produces.remove(xmlid);

String indent = "";

boolean newLines = true;

XMLOutputter outp = new XMLOutputter(indent,newLines,"GBK");

fo=new FileOutputStream(path);

outp.output(doc,fo);

}

catch(Exception e){

System.err.println(e+"error");

}

finally{

try{

fi.close();

fo.close();

}

catch(Exception e){

e.printStackTrace();

}

/**

* 往XML文件中添加一条记录产品信息

**/

public static void AddXML(HttpServletRequest request)throws Exception{

FileInputStream fi = null;

FileOutputStream fo = null;

try{

XMLBean bean=new XMLBean();

String path=request.getParameter("path");

fi = new FileInputStream(path);

SAXBuilder sb = new SAXBuilder();

Document doc = sb.build(fi);

Element root = doc.getRootElement(); //

List produces = root.getChildren(); //

String produceid=bean.toChinese(request.getParameter("ProduceID"));

String producename=bean.toChinese(request.getParameter("ProduceName"));

String produceclass=bean.toChinese(request.getParameter("ProduceClass"));

String producetype=bean.toChinese(request.getParameter("ProduceType"));

String producecolor=bean.toChinese(request.getParameter("ProduceColor"));

String baozhiqi=bean.toChinese(request.getParameter("Baozhiqi"));

String producenum=bean.toChinese(request.getParameter("ProduceNum"));

String producedep=bean.toChinese(request.getParameter("ProduceDep"));

String producedate=bean.toChinese(request.getParameter("ProduceDate"));

Text newtext;

Element newproduce= new Element("Produce");

Element newproduceid= new Element("ProduceID");

newproduceid.setText(produceid);

newproduce.addContent(newproduceid);

Element newproducename= new Element("ProduceName");

newproducename.setText(producename);

newproduce.addContent(newproducename);

Element newproduceclass= new Element("ProduceClass");

newproduceclass.setText(produceclass);

newproduce.addContent(newproduceclass);

Element newproducetype= new Element("ProduceType");

newproducetype.setText(producetype);

newproduce.addContent(newproducetype);

Element newproducecolor= new Element("ProduceColor");

newproducecolor.setText(producecolor);

newproduce.addContent(newproducecolor);

Element newbaozhiqi= new Element("Baozhiqi");

newbaozhiqi.setText(baozhiqi);

newproduce.addContent(newbaozhiqi);

Element newproducenum= new Element("ProduceNum");

newproducenum.setText(producenum);

newproduce.addContent(newproducenum);

Element newproducedep= new Element("ProduceDep");

newproducedep.setText(producedep);

newproduce.addContent(newproducedep);

Element newproducedate= new Element("ProduceDate");

newproducedate.setText(producedate);

newproduce.addContent(newproducedate);

produces.add(newproduce);//

String indent = "\n";

boolean newLines = true;

XMLOutputter outp = new XMLOutputter(indent,newLines,"GBK");

fo=new FileOutputStream(path);

outp.output(doc,fo);

}

catch(Exception e){

System.err.println(e+"error");

}

finally{

try{

fi.close();

fo.close();

}

catch(Exception e){

e.printStackTrace();

}

/**

* 更改XML中指定的记录的信息

public static void EditXML(HttpServletRequest request)throws Exception{

FileInputStream fi = null;

FileOutputStream fo = null;

try{

XMLBean bean=new XMLBean();

String path=request.getParameter("path");

int xmlid=Integer.parseInt(request.getParameter("id"));

fi = new FileInputStream(path);

SAXBuilder sb = new SAXBuilder();

Document doc = sb.build(fi);

Element root = doc.getRootElement(); //

List produces = root.getChildren(); //

Element produce=(Element)produces.get(xmlid);