dom4j

来源：互联网发布：李天生sql视频教程编辑：程序博客网时间：2024/06/16 19:56

生成xml，或转化为string

package dom4j;import org.dom4j.Document;import org.dom4j.DocumentHelper;import org.dom4j.Element;import org.dom4j.io.XMLWriter;import java.io.*;public class XmlDom4J {public void generateDocument(){Document document = DocumentHelper.createDocument();     Element catalogElement = document.addElement("catalog");     catalogElement.addComment("An XML Catalog");     catalogElement.addProcessingInstruction("target","text");     Element journalElement =  catalogElement.addElement("journal");     journalElement.addAttribute("title", "XML Zone");     journalElement.addAttribute("publisher", "IBM developerWorks");     Element articleElement=journalElement.addElement("article");     articleElement.addAttribute("level", "Intermediate");     articleElement.addAttribute("date", "December-2001");     Element  titleElement=articleElement.addElement("title");     titleElement.setText("Java configuration with XML Schema");     Element authorElement=articleElement.addElement("author");     Element  firstNameElement=authorElement.addElement("firstname");     firstNameElement.setText("Marcello");     Element lastNameElement=authorElement.addElement("lastname");     lastNameElement.setText("Vitaletti");//     document.addDocType("catalog",//                           null,"file://c:/Dtds/catalog.dtd");     String str = document.asXML();//             doc = DocumentHelper.parseText(xml); // 将字符串转为XML     System.out.println(str);         try{    XMLWriter output = new XMLWriter(            new FileWriter( new File("c:/catalog/catalog.xml") ));        output.write( document );        output.close();        }     catch(IOException e){System.out.println(e.getMessage());}}public static void main(String[] argv){XmlDom4J dom4j=new XmlDom4J();dom4j.generateDocument();}}

修改xml

package dom4j;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.Attribute;import java.util.List;import java.util.Iterator;import org.dom4j.io.XMLWriter;import java.io.*;import org.dom4j.DocumentException;import org.dom4j.io.SAXReader; public class Dom4JParser {public void modifyDocument(File inputXml){  try{   SAXReader saxReader = new SAXReader();   Document document = saxReader.read(inputXml);   List list = document.selectNodes("//article/@level" );   Iterator iter=list.iterator();   while(iter.hasNext()){    Attribute attribute=(Attribute)iter.next();    if(attribute.getValue().equals("Intermediate"))      attribute.setValue("Introductory");        }      list = document.selectNodes("//article/@date" );   iter=list.iterator();   while(iter.hasNext()){    Attribute attribute=(Attribute)iter.next();    if(attribute.getValue().equals("December-2001"))      attribute.setValue("October-2002");       }   list = document.selectNodes("//article" );   iter=list.iterator();   while(iter.hasNext()){    Element element=(Element)iter.next();    Iterator iterator=element.elementIterator("title");      while(iterator.hasNext()){        Element titleElement=(Element)iterator.next();        if(titleElement.getText().equals("Java configuration with XMLchema"))        titleElement.setText("Create flexible and extensible XML schema");                                          }                                }    list = document.selectNodes("//article/author" );    iter=list.iterator();     while(iter.hasNext()){     Element element=(Element)iter.next();     Iterator iterator=element.elementIterator("firstname");     while(iterator.hasNext()){      Element firstNameElement=(Element)iterator.next();      if(firstNameElement.getText().equals("Marcello"))      firstNameElement.setText("Ayesha");                                     }                              }    list = document.selectNodes("//article/author" );    iter=list.iterator();     while(iter.hasNext()){      Element element=(Element)iter.next();      Iterator iterator=element.elementIterator("lastname");     while(iterator.hasNext()){      Element lastNameElement=(Element)iterator.next();      if(lastNameElement.getText().equals("Vitaletti"))      lastNameElement.setText("Malik");                                  }                               }     XMLWriter output = new XMLWriter(      new FileWriter( new File("c:/catalog/catalog-modified.xml") ));     output.write( document );     output.close();   }   catch(DocumentException e)                 {                  System.out.println(e.getMessage());                            }  catch(IOException e){                       System.out.println(e.getMessage());                    } } public static void main(String[] argv){  Dom4JParser dom4jParser=new Dom4JParser();  dom4jParser.modifyDocument(new File("c:/catalog/catalog.xml")); }}

读取xml格式的字符串

//先加入dom4j.jar包 package dom4j; 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);         }     }  }