The Easiest and Most Efficient Way to Modify XML Documents

The Easiest and Most Efficient Way to Modify XML Documents

The easiest most and most efficient way to update XML documents is to use non-extractive parsers (such as VTD-XML) because they support incremental content update. Suppose you have the following XML document, named test.xml. Below is a snippet that inserts two attribute name/value pairs into an XML document.

  <tag> hello world 

Now, here’s the Java code for doing the attribute insertion:

public class simpleApp2 {   public static void main(String[] s) throws Exception {      VTDGen vg = new VTDGen();      XMLModifier xm = new XMLModifier();      if (vg.parseFile("test.xml", false)){             VTDNav vn = vg.getNav();             xm.bind(vn);             xm.insertAttribute(" attr1='val1" attr2='val2'");             xm.output("new.xml");     }  }   }

The output, named new.xml, is shown below:

  hello world 
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