Updating xml using dom in java

Below code comes handy to parse XML specified as String.

Use xpath object to complie an XPath expression and evaluate it on document.

In short, it turns a XML file into DOM or Tree structure, and you have to traverse a node by node to get what you want.

Warning DOM Parser is slow and consumes a lot of memory when it loads an XML document which contains a lot of data.

Sometimes you might want to parse XML specified as String value instead of reading it from file.

In addition, updated JAXB example to show you how to convert object to / from XML. It parses an entire XML document and load it into memory, modeling it with Object for easy nodel traversal.

DOM Parser is slow and consume a lot memory if it load a XML document which contains a lot of data.

This can be done using the set Attribute() method or setting the node Value property of the attribute node.

XPath is a language for finding information in an XML file.

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