dom4j解析xml

来源:互联网 发布:安卓版r语言软件 编辑:程序博客网 时间:2024/06/16 13:35

class org.dom4j.io.SAXReader 

  • read  提供多种读取xml文件的方式,返回一个Domcument对象 

interface org.dom4j.Document 

  • iterator  使用此法获取node
  • getRootElement  获取根节点 

interface org.dom4j.Node 

  • getName  获取node名字,例如获取根节点名称为bookstore
  • getNodeType  获取node类型常量值,例如获取到bookstore类型为1——Element
  • getNodeTypeName  获取node类型名称,例如获取到的bookstore类型名称为Element

interface org.dom4j.Element 

  • attributes  返回该元素的属性列表
  • attributeValue  根据传入的属性名获取属性值
  • elementIterator  返回包含子元素的迭代器
  • elements  返回包含子元素的列表 

interface org.dom4j.Attribute 

  • getName  获取属性名
  • getValue  获取属性值 

interface org.dom4j.Text 

  • getText  获取Text节点值 

interface org.dom4j.CDATA 

  • getText  获取CDATA Section值 

interface org.dom4j.Comment

       getText  获取注释     

//先加入dom4j.jar包 import java.util.HashMap;import java.util.Iterator;import java.util.Map;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.DocumentHelper;import org.dom4j.Element;public class TestDom4j {    public void readStringXml(String xml) {        Document doc = null;        try {            // 读取并解析XML文档            // SAXReader就是一个管道,用一个流的方式,把xml文件读出来            //             // SAXReader reader = new SAXReader(); //User.hbm.xml表示你要解析的xml文档            // Document document = reader.read(new File("User.hbm.xml"));            // 下面的是通过解析xml字符串的            doc = DocumentHelper.parseText(xml); // 将字符串转为XML            Element rootElt = doc.getRootElement(); // 获取根节点            System.out.println("根节点:" + rootElt.getName()); // 拿到根节点的名称            Iterator iter = rootElt.elementIterator("head"); // 获取根节点下的子节点head            // 遍历head节点            while (iter.hasNext()) {                Element recordEle = (Element) iter.next();                String title = recordEle.elementTextTrim("title"); // 拿到head节点下的子节点title值                System.out.println("title:" + title);                Iterator iters = recordEle.elementIterator("script"); // 获取子节点head下的子节点script                // 遍历Header节点下的Response节点                while (iters.hasNext()) {                    Element itemEle = (Element) iters.next();                    String username = itemEle.elementTextTrim("username"); // 拿到head下的子节点script下的字节点username的值                    String password = itemEle.elementTextTrim("password");                    System.out.println("username:" + username);                    System.out.println("password:" + password);                }            }            Iterator iterss = rootElt.elementIterator("body"); ///获取根节点下的子节点body            // 遍历body节点            while (iterss.hasNext()) {                Element recordEless = (Element) iterss.next();                String result = recordEless.elementTextTrim("result"); // 拿到body节点下的子节点result值                System.out.println("result:" + result);                Iterator itersElIterator = recordEless.elementIterator("form"); // 获取子节点body下的子节点form                // 遍历Header节点下的Response节点                while (itersElIterator.hasNext()) {                    Element itemEle = (Element) itersElIterator.next();                    String banlce = itemEle.elementTextTrim("banlce"); // 拿到body下的子节点form下的字节点banlce的值                    String subID = itemEle.elementTextTrim("subID");                    System.out.println("banlce:" + banlce);                    System.out.println("subID:" + subID);                }            }        } catch (DocumentException e) {            e.printStackTrace();        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * @description 将xml字符串转换成map     * @param xml     * @return Map     */    public static Map readStringXmlOut(String xml) {        Map map = new HashMap();        Document doc = null;        try {            // 将字符串转为XML            doc = DocumentHelper.parseText(xml);             // 获取根节点            Element rootElt = doc.getRootElement();             // 拿到根节点的名称            System.out.println("根节点:" + rootElt.getName());             // 获取根节点下的子节点head            Iterator iter = rootElt.elementIterator("head");             // 遍历head节点            while (iter.hasNext()) {                Element recordEle = (Element) iter.next();                // 拿到head节点下的子节点title值                String title = recordEle.elementTextTrim("title");                 System.out.println("title:" + title);                map.put("title", title);                // 获取子节点head下的子节点script                Iterator iters = recordEle.elementIterator("script");                 // 遍历Header节点下的Response节点                while (iters.hasNext()) {                    Element itemEle = (Element) iters.next();                    // 拿到head下的子节点script下的字节点username的值                    String username = itemEle.elementTextTrim("username");                     String password = itemEle.elementTextTrim("password");                    System.out.println("username:" + username);                    System.out.println("password:" + password);                    map.put("username", username);                    map.put("password", password);                }            }            //获取根节点下的子节点body            Iterator iterss = rootElt.elementIterator("body");             // 遍历body节点            while (iterss.hasNext()) {                Element recordEless = (Element) iterss.next();                // 拿到body节点下的子节点result值                String result = recordEless.elementTextTrim("result");                 System.out.println("result:" + result);                // 获取子节点body下的子节点form                Iterator itersElIterator = recordEless.elementIterator("form");                 // 遍历Header节点下的Response节点                while (itersElIterator.hasNext()) {                    Element itemEle = (Element) itersElIterator.next();                    // 拿到body下的子节点form下的字节点banlce的值                    String banlce = itemEle.elementTextTrim("banlce");                     String subID = itemEle.elementTextTrim("subID");                    System.out.println("banlce:" + banlce);                    System.out.println("subID:" + subID);                    map.put("result", result);                    map.put("banlce", banlce);                    map.put("subID", subID);                }            }        } catch (DocumentException e) {            e.printStackTrace();        } catch (Exception e) {            e.printStackTrace();        }        return map;    }    public static void main(String[] args) {        // 下面是需要解析的xml字符串例子        String xmlString = "<html>" + "<head>" + "<title>dom4j解析一个例子</title>"                + "<script>" + "<username>yangrong</username>"                + "<password>123456</password>" + "</script>" + "</head>"                + "<body>" + "<result>0</result>" + "<form>"                + "<banlce>1000</banlce>" + "<subID>36242519880716</subID>"                + "</form>" + "</body>" + "</html>";        /*         * Test2 test = new Test2(); test.readStringXml(xmlString);         */        Map map = readStringXmlOut(xmlString);        Iterator iters = map.keySet().iterator();        while (iters.hasNext()) {            String key = iters.next().toString(); // 拿到键            String val = map.get(key).toString(); // 拿到值            System.out.println(key + "=" + val);        }    }}

/** * 解析包含有DB连接信息的XML文件 * 格式必须符合如下规范: * 1. 最多三级,每级的node名称自定义; * 2. 二级节点支持节点属性,属性将被视作子节点; * 3. CDATA必须包含在节点中,不能单独出现。 * * 示例1——三级显示: * <db-connections> *         <connection> *            <name>DBTest</name> *            <jndi></jndi> *            <url> *                <![CDATA[jdbc:mysql://localhost:3306/db_test?useUnicode=true&characterEncoding=UTF8]]> *             </url> *            <driver>org.gjt.mm.mysql.Driver</driver> *             <user>test</user> *            <password>test2012</password> *            <max-active>10</max-active> *            <max-idle>10</max-idle> *            <min-idle>2</min-idle> *            <max-wait>10</max-wait> *            <validation-query>SELECT 1+1</validation-query> *         </connection> * </db-connections> * * 示例2——节点属性: * <bookstore> *         <book category="cooking"> *            <title lang="en">Everyday Italian</title> *            <author>Giada De Laurentiis</author> *            <year>2005</year> *            <price>30.00</price> *         </book> * *         <book category="children" title="Harry Potter" author="J K. Rowling" year="2005" price="$29.9"/> * </bookstore> * * @param configFile * @return * @throws Exception */public static List<Map<String, String>> parseDBXML(String configFile) throws Exception {    List<Map<String, String>> dbConnections = new ArrayList<Map<String, String>>();    InputStream is = Parser.class.getResourceAsStream(configFile);    SAXReader saxReader = new SAXReader();    Document document = saxReader.read(is);    Element connections = document.getRootElement();    Iterator<Element> rootIter = connections.elementIterator();    while (rootIter.hasNext()) {        Element connection = rootIter.next();        Iterator<Element> childIter = connection.elementIterator();        Map<String, String> connectionInfo = new HashMap<String, String>();        List<Attribute> attributes = connection.attributes();        for (int i = 0; i < attributes.size(); ++i) { // 添加节点属性            connectionInfo.put(attributes.get(i).getName(), attributes.get(i).getValue());        }        while (childIter.hasNext()) { // 添加子节点            Element attr = childIter.next();            connectionInfo.put(attr.getName().trim(), attr.getText().trim());        }        dbConnections.add(connectionInfo);    }    return dbConnections;}


原创粉丝点击