Java操作xml文件

Bbsxml.java

public class Bbsxml {
private String imgsrc;
private String title;
private String url; 

    public String getTitle() {
    return title;
}
public void setTitle(String title) {
    this.title = title;
}
public String getUrl() {
    return url;
}
public void setUrl(String url) {
    this.url = url;
}
    public String getImgsrc() {
    return imgsrc;
}
public void setImgString imgsrc) { < /span>
    this.imgsrc = imgsrc;
} 

    public static void main(String[] args) {
        // TODO Auto-generated method stub 

    } 

} 

XmlOprate.java

public class XmlOprate {
    Document doc;
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder;
    NodeList imags;
    String path; 

    public NodeList getImags() {
        return imags;
    } 

    public void setImags(NodeList imags) {
        this.imags = imags;
    } 

    /**
     * 构造方法
     *
     * @param path
     *            :xml文件的路径
     * @param nodes
     *            ：要解析的xml节点名称
     */
    public XmlOprate(String path) {
        super();
        this.path = path;
        // System.out.println(System.getProperty("user.dir"));
    } 

    /**
     * 解析XML
     *
     * @param path
     */
    public void readXml() {
        try {
            builder = factory.newDocumentBuilder();
            Document doc = builder.parse(path);
            doc.normalize(); 

            NodeList imags = doc.getElementsByTagName("imags");
            this.setImags(imags);
            for (int i = 0; i < imags.getLength(); i++) {
                Element link = (Element) imags.item(i);
                System.out.print("imgsrc=\'#\'" /span>);
                System.out.println(link.getElementsByTagName("imgsrc").item(0)
                        .getFirstChild().getNodeValue());
                System.out.print("title: ");
                System.out.println(link.getElementsByTagName("title").item(0)
                        .getFirstChild().getNodeValue());
                System.out.print("url: ");
                System.out.println(link.getElementsByTagName("url").item(0)
                        .getFirstChild().getNodeValue());
                System.out.println();
            }
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } 

    } 

    /**
     * http://www.ablanxue.com 解析XML，返回List集合，Bbsxm
     * 只是一个普通的javabean,只提供get，set的方法l，在此不写出，可自己创建了
     *
     * @param path
     */ 

    public List<Bbsxml> xml() {
        List<Bbsxml> list = null;
        list = new ArrayList<Bbsxml>();
        try {
            builder = factory.newDocumentBuilder();
            Document doc = builder.parse(path);
            doc.normalize();
            Bbsxml bbsxml = null;
            NodeList imags = doc.getElementsByTagName("imags");
            this.setImags(imags);
            for (int i = imags.getLength() - 1; i > -1; i--) {
                Element link = (Element) imags.item(i); 

                bbsxml = new Bbsxml();
                bbsxml.setImglink.getElementsByTagName("imgsrc").item(0)
                        .getFirstChild().getNodeValue());
                bbsxml.setTitle(link.getElementsByTagName("title").item(0)
                        .getFirstChild().getNodeValue());
                bbsxml.setUrl(link.getElementsByTagName("url").item(0)
                        .getFirstChild().getNodeValue());
                list.add(bbsxml); 

            }
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } 

        return list;
    } 

    /**
     * addCode
     *
     * @param path
     */
    public void addXmlCode(String imgsrc, String title, String url) { 

        try {
            builder = factory.newDocumentBuilder();
            Document doc = builder.parse(path);
            doc.normalize(); 

            Text textseg;
            Element imag = doc.createElement("imags"); 

            Element linkimgsrc = doc.createElement("imgsrc");
            textseg = doc.createTextNode(imgsrc);
            linkimgsrc.appendChild(textseg);
            imag.appendChild(linkimgsrc); 

            Element linktitle = doc.createElement("title");
            textseg = doc.createTextNode(title);
            linktitle.appendChild(textseg);
            imag.appendChild(linktitle); 

            Element linkurl = doc.createElement("url");
            textseg = doc.createTextNode(url);
            linkurl.appendChild(textseg);
            imag.appendChild(linkurl); 

            doc.getDocumentElement().appendChild(imag); 

            TransformerFactory tFactory = TransformerFactory.newInstance();
            Transformer transformer; 

            transformer = tFactory.newTransformer();
            DOMSource source = new DOMSource(doc);
            StreamResult result = new StreamResult(new java.io.File(path));
            transformer.transform(source, result);
        } catch (Exception e) { 

        }
    } 

    /**
     * delete xml code
     *
     * @param path
     */
    public void delXmlCode() { 

        try {
            builder = factory.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            doc = builder.parse(path);
        } catch (SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        doc.normalize();
        NodeList imags = doc.getElementsByTagName("imags"); 

        // if (imags.getLength() > 9) {
        // 删除节点
        Element elink = (Element) imags.item(0);
        elink.removeChild(elink.getElementsByTagName("imgsrc").item(0));
        elink.removeChild(elink.getElementsByTagName("title").item(0));
        elink.removeChild(elink.getElementsByTagName("url").item(0)); 

        doc.getFirstChild().removeChild(elink); 

        TransformerFactory tFactory = TransformerFactory.newInstance();
        Transformer transformer = null;
        try {
            transformer = tFactory.newTransformer();
        } catch (TransformerConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(new java.io.File(path));
        try {
            transformer.transform(source, result);
        } catch (TransformerException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        // } 

    } 

    public static void main(String[] args) {
        XmlOprate xm = new XmlOprate("data.xml");
        // xm.readXml();
        // xm.addXmlCode("images/1.gif", "xuexiii", "http://www.baidu.com");
        xm.delXmlCode();
    } 

}

　　

data.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<root>
    <imags>
        <imgsrc>images/ad-02.jpg</imgsrc>
        <title>java读取xml文件</title>
        <url>http://www.ablanxue.com</url>
    </imags>
    <imags>
        <imgsrc>images/1.gif</imgsrc>
        <title>xuexiii</title>
        <url>http://www.baidu.com</url>
        </imags>
    </root> 

JSP页面直接操作 xml.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="javax.xml.parsers.*"%>
<%@ page import="org.w3c.dom.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<%
    //建立一个解析器工厂
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    //获得一个具体的解析器对象
    DocumentBuilder builder = factory.newDocumentBuilder();
    //对XML文档进行解析，获得Document对象
    Document doc = builder.parse(request.getRealPath("/")+ "WEB-INF/data.xml");
    doc.normalize();
    //获取所有的book元素列表
    NodeList books = doc.getElementsByTagName("book");
%>
</head>
<body>
    <h2>图书列表</h2>
    <br>
    <%
        for (int i = 0; i < books.getLength(); i++) {
            //获取一个book元素
            Element book = (Element) books.item(i);
            //以下获取book的子元素，并输出
            out.print("title:");
            out.println(book.getElementsByTagName("title").item(0).getFirstChild().getNodeValue());
            out.print("<br>");
            out.print("URL:");
            out.println(book.getElementsByTagName("url").item(0).getFirstChild().getNodeValue());
            out.print("<br>");
            out.print("Author:");
            out.println(book.getElementsByTagName("author").item(0).getFirstChild().getNodeValue());
            out.print("<br>");
            out.print("Date:");
            Element bookdate = (Element) book.getElementsByTagName("date").item(0);
            String day = book.getElementsByTagName("day").item(0).getFirstChild().getNodeValue();
            String month = book.getElementsByTagName("month").item(0).getFirstChild().getNodeValue();
            String year = book.getElementsByTagName("year").item(0).getFirstChild().getNodeValue();
            out.println(day + "-" + month + "-" + year);
            out.print("<br>");
            out.print("Description:");
            out.println(book.getElementsByTagName("description").item(0).getFirstChild().getNodeValue());
            out.print("<br><br>");
        }
    %>
</body>
</html>