求助：关于jsp中使用xml

import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;public class Hello{
    public static void main(String[] args) throws Exception{
        new Hello();
    }    public Hello() throws Exception{
        DocumentBuilderFactory Factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder DBuilder = Factory.newDocumentBuilder();
        StringBuffer xmlString = new StringBuffer();
        xmlString.append("<newspaper>");

        xmlString.append("<publication ID=\"1056\">");
        xmlString.append("<year>2000</year>");
        xmlString.append("<month>08</month>");
        xmlString.append("<number>26</number>");
        xmlString.append("</publication>");
        xmlString.append("<publication ID=\"1057\">");
        xmlString.append("<year>2105</year>");
        xmlString.append("<month>12</month>");
        xmlString.append("<number>03</number>");
        xmlString.append("</publication>");
        xmlString.append("<publication ID=\"1056\">");
        xmlString.append("<year>2005</year>");
        xmlString.append("<month>12</month>");
        xmlString.append("<number>25</number>");
        xmlString.append("</publication>");
        xmlString.append("<publication ID=\"1058\">");
        xmlString.append("<year>2035</year>");
        xmlString.append("<month>06</month>");
        xmlString.append("<number>13</number>");
        xmlString.append("</publication>");        xmlString.append("</newspaper>");

        StringReader iostring = new StringReader(xmlString.toString());
        org.xml.sax.InputSource is = new org.xml.sax.InputSource(iostring);
        Document XML = DBuilder.parse(is);
        XML.normalize();
        Node xml = XML.getFirstChild();        System.out.println("get root tag is:" + xml.getNodeName());
        NodeList list = xml.getChildNodes();
        System.out.println("root tag size is:" + list.getLength());
        for(int i = 0; i < list.getLength(); i++){
            Node curItem = list.item(i);
            if(curItem == null ||
               !curItem.hasChildNodes() ||
               !curItem.hasAttributes() ||
               !curItem.getNodeName().equalsIgnoreCase("publication") ||
               !curItem.getAttributes().getNamedItem("ID").getNodeValue().
               equals("1056")){
                System.out.println("Wrong Node,Skip it.");
                continue;
            }
            //String curYear = curItem.getChildNodes();
            System.out.println("Bingo!Got One!");
            NodeList curBingoList = curItem.getChildNodes();
            for(int j = 0; j < curBingoList.getLength(); j++){
                System.out.println(curBingoList.item(j).getNodeName() + "=" +
                                   curBingoList.item(j).getFirstChild().getNodeValue());
            }
        }
    }
}

我想可能是我提问时候没有表达清楚，我要实现的是：在我建立好（已经写入）的xml文档中，通过提供作为参数的某些结点值，例如<year>,<month>的值，查询得到相应其他结点的值，如<publication>,<number>等。

xml解析常用的节点访问，属性访问方法都在这里面了，自己根据具体需要去调用不就行了。

/*
* Created on 2004-8-4 by Jem.Lee <李克喜>
*
* XmlPaser.java is a part of cn.bs.common.control
* ALL RIGHTS RESERVED.
* COPYRIGHT (C) 2004. Jem.Lee <李克喜>
*//* 包路径 cn.bs.common.control*/
package wst;import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;import org.jdom.Attribute;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;/*Import包内容*/
/**
* <PRE>
* History
* 2004-8-4 1:29:41 created by Jem.Lee <李克喜>
*
* 目的
* 解释配置文件，并从配置文件中取得相应的信息
* </PRE>
*/
public class Control_xml2  {

String filepath = "";
SAXBuilder sb = null;
Document doc = null;
FileInputStream file = null;

/**
* XML文件处理的构造器
* @param path
* @throws FileNotFoundException
* @throws JDOMException
* @throws MalformedURLException
*/
public Control_xml2(String path) throws FileNotFoundException, JDOMException, MalformedURLException{
filepath = path;
try {
sb = new SAXBuilder();
file =  new FileInputStream(filepath);
try {
doc =  sb.build(file);//注意改成一个配置属性文件
} catch (IOException e1) {
// TODO 自动生成 catch 块
e1.printStackTrace();
}
} catch (FileNotFoundException e) {
throw e;
} catch (JDOMException e) {
throw e;
}
}
/**
* <PRE>
* 释放对象
* @throws IOException
* </PRE>
*/
public void CloseFile() throws IOException{
file.close();
file = null;
doc  = null;
sb = null;
}

    /**
     * <PRE>
     * 通过事件ID获得处理该事件的Servlet
     * @param eventid 事件ID
     * @return 处理Servlet
     * </PRE>
     */
    public String get_year(String eventid) {


        String year="";

        /*查询跳出标记*/
        boolean breakflag = false;

        try {

            //从文件构造一个Document，并装载了配置XML文件。

            Element root = doc.getRootElement(); //得到根元素
            java.util.List newspaper = root.getChildren(); //获得页面的集合
            /*页面循环*/
            for (int i = 0; i < newspaper.size(); i++) {
                Element publication = (Element)newspaper.get(i); //获得一个页面
                Attribute ID = config.getAttribute("ID"); //获得ID属性
                Attribute year = config.getAttribute("year");//获得year属性


                        /*获取对应的_yearServlet*/
                        if(eventid.equals(ID.getValue())){
                            year = year.getValue();

                            breakflag = true;
                            break;
                        }

                    /*如果已经找到则跳出*/
                    if(breakflag){
                        break;
                    }
                }
                /*如果已经找到则跳出*/


        } catch (Exception ex) {
            System.out.print(ex.getMessage());

        }        return year;
    }

    public String get_month(String eventid) {


        String month="";

        /*查询跳出标记*/
        boolean breakflag = false;

        try {

            //从文件构造一个Document，并装载了配置XML文件。

            Element root = doc.getRootElement(); //得到根元素
            java.util.List newspaper = root.getChildren(); //获得页面的集合
            /*页面循环*/
            for (int i = 0; i < newspaper.size(); i++) {
                Element publication = (Element)newspaper.get(i); //获得一个页面
                Attribute ID = config.getAttribute("ID"); //获得ID属性
                Attribute month = config.getAttribute("month");//获得month属性


                        /*获取对应的_monthServlet*/
                        if(eventid.equals(ID.getValue())){
                            month = month.getValue();

                            breakflag = true;
                            break;
                        }

                    /*如果已经找到则跳出*/
                    if(breakflag){
                        break;
                    }
                }
                /*如果已经找到则跳出*/


        } catch (Exception ex) {
            System.out.print(ex.getMessage());

        }        return month;
    }

   public String get_number(String eventid) {


        String number="";

        /*查询跳出标记*/
        boolean breakflag = false;

        try {

            //从文件构造一个Document，并装载了配置XML文件。

            Element root = doc.getRootElement(); //得到根元素
            java.util.List newspaper = root.getChildren(); //获得页面的集合
            /*页面循环*/
            for (int i = 0; i < newspaper.size(); i++) {
                Element publication = (Element)newspaper.get(i); //获得一个页面
                Attribute ID = config.getAttribute("ID"); //获得ID属性
                Attribute number = config.getAttribute("number");//获得number属性


                        /*获取对应的_numberServlet*/
                        if(eventid.equals(ID.getValue())){
                            number = number.getValue();

                            breakflag = true;
                            break;
                        }

                    /*如果已经找到则跳出*/
                    if(breakflag){
                        break;
                    }
                }
                /*如果已经找到则跳出*/


        } catch (Exception ex) {
            System.out.print(ex.getMessage());

        }        return number;
    }

}

使用的时候
String path=getServletContext().getRealPath("＊＊＊.xml");//你的xml一般放在web-inf/下

Control_xml2 xml=new Control_xml2(path);
xml.get_month(id);
....
..
..

调试易

求助：关于jsp中使用xml

解决方案 »