The implementation method of Java to check and delete XML node attributes _java

See my other article before you learn this article Java operations on XML nodes can have a better understanding of XML operations.

Package vastsum;
Import Java.io.File;
Import Java.io.FileWriter;

Import Java.util.Iterator;
Import Org.dom4j.Attribute;
Import org.dom4j.Document;
Import org.dom4j.Element;
Import Org.dom4j.io.SAXReader;
Import Org.dom4j.io.XMLWriter;

Import Org.junit.Test; /** * Using DOM4J to manipulate XML * to XML attribute operation * Time: October 2, 2016 * operation XML file is contact.xml * This file name is: Attrdemo.java * @author shutu008 * * /public class attrdemo{@Test public void Exmple () throws exception{//read XML file, get Document object Saxreader reader = new
  Saxreader ();
  
  Document document = Reader.read (New File ("./src/contact.xml"));
  Gets the attribute object Element Rootelem = Document.getrootelement () of a node; 
  
  Gets the root Node Property object attribute Rootattr = Rootelem.attribute ("id");
  Gets the specified node Property object Element Contactelem = rootelem.element ("contact");
  
  Attribute contactattr = Contactelem.attribute ("id"); Iterate through all the attributes for a node for (iterator it = Contactelem.attributeiterator (); It.hasnext ();) {attribute conattr= It.nex
   T (); String Contxt = conattr. GetValue ();
   String conattrname = Conattr.getname ();
  System.out.println (conattrname+ "=" +contxt);
  
  //Set the properties and values of a node Contactelem.addattribute ("name", "Zhangsan");
  Set (change) The value attribute of a property nameattr = Contactelem.attribute ("name");
  
  Nameattr.setvalue ("Lisi");
  Deletes the specified attribute of a node contactelem.remove (nameattr);
  Writes a node's properties and values to an XML document XMLWriter writer = new XMLWriter (New FileWriter ("./src/contact.xml"));
  Writer.write (document);
  
  Writer.close ();
   /** * If the document has Chinese need to set the character encoding * Use the following statement: * OutputFormat format = Outputformat.createprettyprint ();
   * Format.setencoding ("GBK");
   * XMLWriter writer = new XMLWriter (New FileWriter ("./src/contact.xml"), format);
  *//Get the property name System.out.println (Rootattr.getname ()) of the specified object;
  System.out.println (Contactattr.getname ());
  Gets the property value System.out.println (Contactattr.getvalue ()) of the specified object;
 System.out.println (Rootattr.getvalue ()); }
}

Note: The above example code can be run directly. You can use JUnit 4 to adjust the code for this example.

The following is an XML document:

<?xml version= "1.0" encoding= "UTF-8"?> <contactlist id= "
0" > <contact id= "001"
 class= "style" >
  <name> John </name>
  <age>20</age>
  <phone>134222223333</phone>
  <email>zhangsan@qq.com</email>
  <qq>432221111</qq>
 </contact>
 <contact id= "002" >
  <name> Dick </name>
  <age>20</age>
  <phone> 134222225555</phone>
  <email>lisi@qq.com</email>
  <qq>432222222</qq>
 </contact>
 <contactTwo>
  <name> Harry </name>
  <age>32</age>
  <phone>465431341</phone>
  <emali>af@qq.com</emali>
  <qq>46164694 </qq>
 </contactTwo>
 <test> test </test>
 <test> other uses </test>
</contactList>

The file directory is as shown in the figure:

The above is a small series for everyone to bring the Java to the XML node attributes of additions and deletions to achieve the full content of the method, I hope that we support the cloud-Habitat Community ~