Reading a zip file from java using ZipInputStream

By dave on July 1, 2012

Java provides support for reading zip files in the form of ZipInputStream. This class provides an API where you can iterate over all the items in a given zip file, reading the data from the archive for each file. In order to do this, first you must create the ZipInputStream instance giving the file that you wish to expand. Then you iterate using the getNextEntry method on the stream, which returns the header data for each entry in turn.

Reading XML in groovy using XmlParser

By dave on July 1, 2012

Groovy has great inbuilt xml support, and allows you to treat xml paths like objects. Reading elements and attributes is so straightforward that it was one of the factors that got me started with Groovy. So to build an object tree from xml, we just use the XmlParser class. To dereference an element we use normal dot syntax, for an attribute, simply add the at symbol (@) before the name, see the example below.

Write XML with GroovyBuilder

By dave on July 1, 2012

Groovy supports the concept of builders, which provide an abstraction between the required output content and the representation of it. Groovy supports this by providing a tree like structure in groovy code that represents the required HTML or XML: import groovy.xml.MarkupBuilder // create a builder to generate xml like content from a // builder structure, in this case we choose // StringWriter as the output, but it could be any writer.

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