Java XML Framework dom4j parsing XML strings and using DOM4J to create XML

DOM4J is one of the most common XML parsing frameworks in Java, and the other jdom and Dom are excellent XML frameworks, taking dom4j as an example to illustrate XML string parsing

This is the structure of the XML in the code, MetaData has an array structure that needs to be read in a circular

<?xml version= "1.0"?>
<item name= "\" 20160202014140_208_59400.jpg\ "" id= "\" 9737853a-3cb8-48d5-a735-a75c3e8fa721\ "" Relativepath= "\" user\\obama\\20160202014140_208_59400.jpg\ "" >
    <fileinfo fileindexed= "\" 2016-02-02 "numpages=" \ "1\" "resolution=" \ "96\" "width=" \ "1600\" "height=" \ "1200\" " Filesize= "\" 202.42 ">
        <metaData>
            <item name=" \ "Width" value= "\" 1600\ "" "/> <item name=
            "\" Height "value=" \ "1200\" "/>
            <item name=" \ "resolution\" "value=" \ "96\" "/>
        </metaData>
        <boxes/>
    </fileInfo>
</item>

Code Demo

Package dom4j;
Import Org.dom4j.Attribute;
Import org.dom4j.Document;
Import org.dom4j.DocumentException;
Import Org.dom4j.DocumentHelper;
Import Org.dom4j.io.SAXReader;
Import Org.dom4j.jaxb.JAXBReader;
Import org.dom4j.Element;
Import java.awt.Component;

Import Java.util.Iterator;

Import java.util.List; public class Test01 {public static void main (string[] args) {//XML demo string string xml = "<item name=\" 201 60202014140_208_59400.jpg\ "id=\" 9737853a-3cb8-48d5-a735-a75c3e8fa721\ "relativepath=\" user\\Obama\\ 20160202014140_208_59400.jpg\ "><fileinfo fileindexed=\" 2016-02-02 01:41:32\ "numPages=\" 1\ "resolution=\" 96\ "Width=\" 1600\ "height=\" 1200\ "filesize=\" 202.42 kb\ "><metadata><item name=\" width (px) \ "Value=\" 1600\ "/><item name=\" Height (px) \ value=\ "1200\"/><item name=\ "resolution\" value=\ "96\"/></metadata
    
    ><boxes/></fileinfo></item> "; try {//download XML Document doc = DocumenthelpEr.parsetext (XML);

      root element element = Doc.getrootelement ();
      Node by root String name = Element.attributevalue ("name");
      String id = element.attributevalue ("id");

      String RelativePath = Element.attributevalue ("RelativePath");
      SYSTEM.OUT.PRINTLN (name);
      SYSTEM.OUT.PRINTLN (ID);

      System.out.println (RelativePath);

      Node By/item/fileinfo element = Element.element ("FileInfo");
      String fileindexed = Element.attributevalue ("fileindexed");
      String numpages = Element.attributevalue ("NumPages");

      String Resolution = Element.attributevalue ("Resolution");
      System.out.println (fileindexed);
      System.out.println (NUMPAGES);

      SYSTEM.OUT.PRINTLN (resolution);
      Node By/item/fileinfo/metadata element = Doc.getrootelement ();
      element = Element.element ("FileInfo");
      element = Element.element ("MetaData");

      Iterator it = Element.elementiterator (); All over the metaData.Item and print while (It.hasnext ()) {//Get Item element item = (Element) it.next ();
        String n = item.attributevalue ("name");

        String v = item.attributevalue ("value");
        System.out.print (n);
        System.out.print (":");
      System.out.println (v);
    } catch (Documentexception e) {e.printstacktrace ();
 }

  }

}

By dom4j parsing, the XML string displays the following results:

20160202014140_208_59400.jpg
9737853a-3cb8-48d5-a735-a75c3e8fa721
User\obama\20160202014140_208_59400.jpg
2016-02-02 01:41:32
1
96
Width (px): 1600
Height (px): 1200

resolution:96

Create the XML code as follows:

Package code02;
Import org.dom4j.Document;
Import Org.dom4j.DocumentHelper;

Import org.dom4j.Element; public class Makexml {public static void main (string[] args) {//Create XML object Document doc = documenthelper.cr
    Eatedocument ();

    Set the encoding doc.setxmlencoding ("Utf-8");

    Create a root node Element root = doc.addelement ("root");
    Create a node, add a property, set the value Element Elementa = root.addelement ("Elementa"). AddAttribute ("Color", "red");
    Elementa.settext ("This is Red");
    Element ELEMENTB = root.addelement ("Elementb"). AddAttribute ("Color", "blue");

    Elementa.settext ("This is Blue");
    Create a node, add a property, set the value Element elementA1 = elementa.addelement ("elementA1"). AddAttribute ("Color", "pink");
    Elementa1.settext ("This is Pink");
    Element elementA2 = elementa.addelement ("elementA2"). AddAttribute ("Color", "brown");
    Elementa2.settext ("This is brown");
    Element elementA3 = elementa.addelement ("ElementA3"). AddAttribute ("Color", "gray"); Elementa3.settext ("Thisis Gray ");
    Create a node, add a property, set the value Element elementB1 = elementb.addelement ("elementB1"). AddAttribute ("Color", "green");
    Element elementB2 = elementb.addelement ("elementB2"). AddAttribute ("Color", "orange");

    Element elementB3 = elementb.addelement ("ElementB3"). AddAttribute ("Color", "yellow");
    Output XML String strxml = Doc.asxml ();
  System.out.println (strxml);
 }

}

Output results:

<?xml version= "1.0" encoding= "Utf-8"?>
<root>
    <elementa color= "Red" >this is blue
        < ElementA1 color= "Pink" >this is pink</elementa1> <elementa2 color=
        ' Brown ' >this is brown</ elementa2>
        <elementa3 color= "Gray" >this is gray</elementa3>
    </elementA>
    < ELEMENTB color= "Blue" >
        <elementb1 color= "green"/> <elementb2 color=
        "Orange"/>
        < ElementB3 color= "Yellow"/>
    </elementB>
</root>

DOM4J's download Address: http://sourceforge.net/projects/dom4j/

Q Group Discussion 236201801

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