dom4j를 통해 xml 문자열을 구문 분석하는 방법 공유

  1 //先加入dom4j.jar包   2 import java.util.HashMap;  3 import java.util.Iterator;  4 import java.util.Map;  5   6 import org.dom4j.Document;  7 import org.dom4j.DocumentException;  8 import org.dom4j.DocumentHelper;  9 import org.dom4j.Element; 10  11 /**    12 * @Title: TestDom4j.java 13 * @Package 
 14 * @Description: 解析xml字符串 15 * @author 无处不在 16 * @date 2012-11-20 下午05:14:05 17 * @version V1.0   
 18 */ 19 public class TestDom4j { 20  21     public void readStringXml(String xml) { 22         Document doc = null; 23         try { 24  25             // 读取并解析XML文档 26             // SAXReader就是一个管道，用一个流的方式，把xml文件读出来 27             //  28             // SAXReader reader = new SAXReader(); //User.hbm.xml表示你要解析的xml文档 29             // Document document = reader.read(new File("User.hbm.xml")); 30             // 下面的是通过解析xml字符串的 31             doc = DocumentHelper.parseText(xml); // 将字符串转为XML 32  33             Element rootElt = doc.getRootElement(); // 获取根节点 34             System.out.println("根节点：" + rootElt.getName()); // 拿到根节点的名称 35  36             Iterator iter = rootElt.elementIterator("head"); // 获取根节点下的子节点head 37  38             // 遍历head节点 39             while (iter.hasNext()) { 40  41                 Element recordEle = (Element) iter.next(); 42                 String title = recordEle.elementTextTrim("title"); // 拿到head节点下的子节点title值 43                 System.out.println("title:" + title); 44  45                 Iterator iters = recordEle.elementIterator("script"); // 获取子节点head下的子节点script 46  47                 // 遍历Header节点下的Response节点 48                 while (iters.hasNext()) { 49  50                     Element itemEle = (Element) iters.next(); 51  52                     String username = itemEle.elementTextTrim("username"); // 拿到head下的子节点script下的字节点username的值 53                     String password = itemEle.elementTextTrim("password"); 54  55                     System.out.println("username:" + username); 56                     System.out.println("password:" + password); 57                 } 58             } 59             Iterator iterss = rootElt.elementIterator("body"); ///获取根节点下的子节点body 60             // 遍历body节点 61             while (iterss.hasNext()) { 62  63                 Element recordEless = (Element) iterss.next(); 64                 String result = recordEless.elementTextTrim("result"); // 拿到body节点下的子节点result值 65                 System.out.println("result:" + result); 66  67                 Iterator itersElIterator = recordEless.elementIterator("form"); // 获取子节点body下的子节点form 68                 // 遍历Header节点下的Response节点 69                 while (itersElIterator.hasNext()) { 70  71                     Element itemEle = (Element) itersElIterator.next(); 72  73                     String banlce = itemEle.elementTextTrim("banlce"); // 拿到body下的子节点form下的字节点banlce的值 74                     String subID = itemEle.elementTextTrim("subID"); 75  76                     System.out.println("banlce:" + banlce); 77                     System.out.println("subID:" + subID); 78                 } 79             } 80         } catch (DocumentException e) { 81             e.printStackTrace(); 82  83         } catch (Exception e) { 84             e.printStackTrace(); 85  86         } 87     } 88  89     /** 90      * @description 将xml字符串转换成map 91      * @param xml 92      * @return Map 93      */ 94     public static Map readStringXmlOut(String xml) { 95         Map map = new HashMap(); 96         Document doc = null; 97         try { 98             // 将字符串转为XML 99             doc = DocumentHelper.parseText(xml); 
100             // 获取根节点101             Element rootElt = doc.getRootElement(); 
102             // 拿到根节点的名称103             System.out.println("根节点：" + rootElt.getName()); 
104 105             // 获取根节点下的子节点head106             Iterator iter = rootElt.elementIterator("head"); 
107             // 遍历head节点108             while (iter.hasNext()) {109 110                 Element recordEle = (Element) iter.next();111                 // 拿到head节点下的子节点title值112                 String title = recordEle.elementTextTrim("title"); 
113                 System.out.println("title:" + title);114                 map.put("title", title);115                 // 获取子节点head下的子节点script116                 Iterator iters = recordEle.elementIterator("script"); 
117                 // 遍历Header节点下的Response节点118                 while (iters.hasNext()) {119                     Element itemEle = (Element) iters.next();120                     // 拿到head下的子节点script下的字节点username的值121                     String username = itemEle.elementTextTrim("username"); 
122                     String password = itemEle.elementTextTrim("password");123 124                     System.out.println("username:" + username);125                     System.out.println("password:" + password);126                     map.put("username", username);127                     map.put("password", password);128                 }129             }130 131             //获取根节点下的子节点body132             Iterator iterss = rootElt.elementIterator("body"); 
133             // 遍历body节点134             while (iterss.hasNext()) {135                 Element recordEless = (Element) iterss.next();136                 // 拿到body节点下的子节点result值137                 String result = recordEless.elementTextTrim("result"); 
138                 System.out.println("result:" + result);139                 // 获取子节点body下的子节点form140                 Iterator itersElIterator = recordEless.elementIterator("form"); 
141                 // 遍历Header节点下的Response节点142                 while (itersElIterator.hasNext()) {143                     Element itemEle = (Element) itersElIterator.next();144                     // 拿到body下的子节点form下的字节点banlce的值145                     String banlce = itemEle.elementTextTrim("banlce"); 
146                     String subID = itemEle.elementTextTrim("subID");147 148                     System.out.println("banlce:" + banlce);149                     System.out.println("subID:" + subID);150                     map.put("result", result);151                     map.put("banlce", banlce);152                     map.put("subID", subID);153                 }154             }155         } catch (DocumentException e) {156             e.printStackTrace();157         } catch (Exception e) {158             e.printStackTrace();159         }160         return map;161     }162 163     public static void main(String[] args) {164 165         // 下面是需要解析的xml字符串例子166         String xmlString = "<html>" + "<head>" + "<title>dom4j解析一个例子</title>"167                 + "<script>" + "<username>yangrong</username>"168                 + "<password>123456</password>" + "</script>" + "</head>"169                 + "<body>" + "<result>0</result>" + "<form>"170                 + "<banlce>1000</banlce>" + "<subID>36242519880716</subID>"171                 + "</form>" + "</body>" + "</html>";172 173         /*174          * Test2 test = new Test2(); test.readStringXml(xmlString);175          */176         Map map = readStringXmlOut(xmlString);177         Iterator iters = map.keySet().iterator();178         while (iters.hasNext()) {179             String key = iters.next().toString(); // 拿到键180             String val = map.get(key).toString(); // 拿到值181             System.out.println(key + "=" + val);182         }183     }184 185 }实例二：

 1 /** 2  * 解析包含有DB连接信息的XML文件 3  * 格式必须符合如下规范： 4  * 1. 最多三级，每级的node名称自定义； 5  * 2. 二级节点支持节点属性，属性将被视作子节点； 6  * 3. CDATA必须包含在节点中，不能单独出现。 7  * 8  * 示例1——三级显示： 9  * <db-connections>10  *         <connection>11  *            <name>DBTest</name>12  *            <jndi></jndi>13  *            <url>14  *                <![CDATA[jdbc:mysql://localhost:3306/db_test?useUnicode=true&characterEncoding=UTF8]]>15  *             </url>16  *            <driver>org.gjt.mm.mysql.Driver</driver>17  *             <user>test</user>18  *            <password>test2012</password>19  *            <max-active>10</max-active>20  *            <max-idle>10</max-idle>21  *            <min-idle>2</min-idle>22  *            <max-wait>10</max-wait>23  *            <validation-query>SELECT 1+1</validation-query>24  *         </connection>25  * </db-connections>26  *27  * 示例2——节点属性：28  * <bookstore>29  *         <book category="cooking">30  *            <title lang="en">Everyday Italian</title>31  *            <author>Giada De Laurentiis</author>32  *            <year>2005</year>33  *            <price>30.00</price>34  *         </book>35  *36  *         <book category="children" title="Harry Potter" author="J K. Rowling" year="2005" price="$29.9"/>37  * </bookstore>38  *39  * @param configFile40  * @return41  * @throws Exception42  */43 public static List<Map<String, String>> parseDBXML(String configFile) throws Exception {44     List<Map<String, String>> dbConnections = new ArrayList<Map<String, String>>();45     InputStream is = Parser.class.getResourceAsStream(configFile);46     SAXReader saxReader = new SAXReader();47     Document document = saxReader.read(is);48     Element connections = document.getRootElement();49 50     Iterator<Element> rootIter = connections.elementIterator();51     while (rootIter.hasNext()) {52         Element connection = rootIter.next();53         Iterator<Element> childIter = connection.elementIterator();54         Map<String, String> connectionInfo = new HashMap<String, String>();55         List<Attribute> attributes = connection.attributes();56         for (int i = 0; i < attributes.size(); ++i) { // 添加节点属性57             connectionInfo.put(attributes.get(i).getName(), attributes.get(i).getValue());58         }59         while (childIter.hasNext()) { // 添加子节点60             Element attr = childIter.next();61             connectionInfo.put(attr.getName().trim(), attr.getText().trim());62         }63         dbConnections.add(connectionInfo);64     }65 66     return dbConnections;67 }