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在JSP开发中使用jdom解析临时存放数据的XML文件

摘要: 在JSP开发中使用jdom解析临时存放数据的XML文件
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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:


*

Copyright: Copyright (c) 2005


* @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);
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 newproduceid= produce.getChild("ProduceID");
newproduceid.setText(produceid);
//
Element newproducename=produce.getChild("ProduceName");
newproducename.setText(producename);
//
Element newproduceclass=produce.getChild("ProduceClass");
newproduceclass.setText(produceclass);
//
Element newproducetype=produce.getChild("ProduceType");
newproducetype.setText(producetype);
//
Element newproducecolor=produce.getChild("ProduceColor");
newproducecolor.setText(producecolor);
//
Element newbaozhiqi= produce.getChild("Baozhiqi");
newbaozhiqi.setText(baozhiqi);
//
Element newproducenum=produce.getChild("ProduceNum");
newproducenum.setText(producenum);
//
Element newproducedep=produce.getChild("ProduceDep");
newproducedep.setText(producedep);
//
Element newproducedate=produce.getChild("ProduceDate");
newproducedate.setText(producedate);
//
books.set(xmlid,book);
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();
}
}
}
}

　　在这些方法中有很多重复的地方,因为是练习没有考虑太多,读者可以有选择的看一下.

二.调用上面写的JavaBean的JSP程序如下:

得到的结果是一个产品列表页面,它包含了XML文件中所有的产品记录,每条记录都有通向该记录详细信息的页面.同时每条记录后面都有查看,编辑,删除的链接,实现的方法都写在了上面的JavaBean里了,在JSP页面里面仅需要传给它相应参数即可.

效果如下:

<%@ page contentType="text/html; charset=gb2312" language="java" errorPage="" %>
<%@ page language="java" import="java.util.*,xml.*"%>

<head>

产品管理
</head>
<link> href="../images/TBspace.css" type=text/css rel=stylesheet>
<body>

<table width="85%" height="96" border="0" align="center">
<tr>
<td height="92"></td>
</tr>
</table>
录入请求中的产品信息如下
<table border="1" cellspacing="0" width="90%" bordercolorlight="#000000" bordercolordark="#FFFFFF" cellpadding="0">
<tr>
<td width="17%" align="center" bgcolor="#D0D0D0" >产品编号</td>
<td width="25%" align="center" bgcolor="#D0D0D0" >产品名称</td>
<td width="19%" align="center" bgcolor="#D0D0D0">产品类别</td>
<td width="20%" align="center" bgcolor="#D0D0D0">生产部门</td>
<td align="center" bgcolor="#D0D0D0" >查看</td>
<td align="center" bgcolor="#D0D0D0">编辑</td>
<td align="center" bgcolor="#D0D0D0">删除</td>
</tr>
<%
String path =application.getRealPath("/")+"produce.xml";
XMLBean xml=new XMLBean();
Vector xmlall=xml.LoadXML(path);
for(int i=0;i xml=(XMLBean)xmlall.elementAt(i );
%>
<tr>
<td width="17%" align="center" ><%=xml.getProduceID()%></td>
<td width="25%" align="center" >&path=<%=path%>"><%=xml.getProduceName()%></td>
<td width="19%" align="center" ><%=xml.getProduceClass()%></td>
<td width="20%" align="center" ><%=xml.getProduceDep()%></td>
<td align="center" >&path=<%=path%>">view</td>
<td align="center" >&id=<%=i%>&path=<%=path%>">edit</td>
<td align="center" >&path=<%=path%>">delete</td>
</tr>
<%}%>
</table>
<input type="hidden" name="path" value="<%=path%>">

</body>

三.存放产品信息的XML文件produce.xml如下:

<?xml version="1.0" encoding="GBK"?>


PW0005
CD绿毒女士 50ml
女式
50ml
粉红
5
480
第二事业部
2005-05-26

....

　　以上是本人的一点小总结,因为水平有限,不足还请大家谅解,谢谢!

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