"Parsing packages with dom4j" CRUD Operations on XML in DOM manner

It Programmer development Essentials-all kinds of resources download list, history of the most IT resources, personal collection summary.

Package edu.dom4j.dom;

Import Java.io.FileOutputStream;

Import java.io.IOException;

Import java.util.List;

Import org.dom4j.Document;

Import org.dom4j.DocumentException;

Import Org.dom4j.DocumentHelper;

Import org.dom4j.Element;

Import Org.dom4j.io.OutputFormat;

Import Org.dom4j.io.SAXReader;

Import Org.dom4j.io.XMLWriter;

Import Org.junit.Test;

public class Xmlcrud {

Private String xmlfile = "Webroot/product2.xml";

Get the Document object for Product2.xml documents

Public Document GetDocument () throws documentexception{

Saxreader reader = new Saxreader ();

Document document = Reader.read (xmlfile);

return document;

}

Writes an in-memory document object to an XML file

Public document Write2xml (document document) throws ioexception{

OutputFormat format = Outputformat.createprettyprint ();

Format.setencoding ("Utf-8");

XMLWriter writer = new XMLWriter (new FileOutputStream (xmlfile), format);

Writer.write (document);

Writer.close ();

return document;

}

Add New Tags <stock> (add to last) under the first <product>

@Test

public void Addnewtag () throws Documentexception, ioexception{

Document document = GetDocument ();

Element root = Document.getrootelement ();

Get the first product node

Element Product1 = root.element ("Product");

Add a new node to the PRODUCT1 node <stock>

Element stock = Product1.addelement ("Stock")

. AddAttribute ("description", "stock");

Stock.settext ("200");

Write2xml (document);

}

Insert a new label at the specified location: <notes> This is the wrench </notes> front Insert <salenum>

@Test

public void Insertnewtag () throws Documentexception, ioexception{

Document document = GetDocument ();

Creating a new node here does not create a new node in the way above, only with the help of Documenthelper

Element salenum = documenthelper.createelement ("Salenum");

Salenum.addattribute ("description", "Sales"). SetText ("100");

Get the first product node

Element Product1 =document.getrootelement (). Element ("Product");

Get the child node collection for the product node

list<element> sonlist = product1.elements ();

Sonlist.add (2,salenum);

Write2xml (document);

}

Delete the specified node: delete the <salenum> node inserted above

@Test

public void Removetag () throws Documentexception, ioexception{

Document document = GetDocument ();

Element product1 = Document.getrootelement (). Element ("Product");

Element salenum = product1.element ("Salenum");

Product1.remove (Salenum);

Write2xml (document);

}

Change <stock description= "inventory" >200</stock> properties and text

@Test

public void Updatetag () throws Documentexception, ioexception{

Document document = GetDocument ();

Element product1 = (Element) document.getrootelement (). Elements ("Product"). Get (0);

Element stock = Product1.element ("Stock");

Stock.setattributevalue ("description", "Inventory volume");//This method is obsolete

Stock.attribute ("description"). SetValue ("Stock Amount");

Stock.settext ("200 pieces");

Write2xml (document);

}

}

product2.xml File:

<?xml version= "1.0" encoding= "Utf-8"?>

<catalog id= "Cata1" >

<product category= "Handtool" inventory= "Instock" >

<specifications weight= "2.0kg" > Wrench </specifications>

<price street= "Hong Kong Street" >80.0</price>

<notes> This is the wrench </notes>

</product>

<product category= "Table" >

<specifications> Tables </specifications>

<price street= "Macau Street" wholesale= "part" >100.0</price>

</product>

</catalog>