Working with DOM4J XML (3)

Today I want to use DOM4J to select the node, by the way, there is no separate way to go heavy, but there is a can go heavy, but also must provide an XPath as the basis for sorting and de-weight.

1. xml file

<?XML version= "1.0" encoding= "UTF-8"?><Tasks>    <Taskname= "Work"Delay= "0"period= "43200"></Task>    <Taskname= "Sleep"Delay= "3600"period= "43200"></Task>    <Taskname= "Play"Delay= "+"period= "604800"></Task>    <Taskname= "Play"Delay= "+"period= "604800"></Task></Tasks>

2, the method and parameters used to explain:

The SelectNodes has 3 overloaded methods, one parameter, two parameters, and three parameters.

Selectnode (String xpath1, String xpath2, String boolval)

(1) Xpath1: Used to select a node in the text and return a result set (list<node>).

(2) Xpath2: The point of view of a node in the result, pointing out the basis of sorting and de-weight.

(3) 0boolVal: When the parameter is true, the selected result is de-processed.

Uh...... Seems a little difficult to understand, see examples.

3. Test code and results

Document doc = new Saxreader (). Read (New File ("Src/operxml/xmlfiles/tasks.xml"));

 01, select all the task nodes, according to the name attribute of the node to sort, the result is heavy.  true-System.out.println (Tn.asxml ()));

Results:

<Taskname= "Play"Delay= "+"period= "604800"/><Taskname= "Sleep"Delay= "3600"period= "43200"/><Taskname= "Work"Delay= "0"period= "43200"/>

// 02. Get all task names, sort by task name and go to weight // list<node> tasknames = Doc.selectnodes ("/ /// How to select a single node.  trueTasknames.foreach (TN---SYSTEM.OUT.PRINTLN (Tn.asxml ()));

Results:

Name= "Play" Name= "Sleep" name= "work"

// 03. Get all the task names, sort by delay and go to heavy true // The second parameter is sorted by, de-re-based (obviously ordered by delay; compared to 02:02 has the same name, only one after the go-back, and 03 in delay. )Tasknames.foreach (TN-SYSTEM.OUT.PRINTLN (Tn.asxml ()));

Results:

Name= "Work" name= "Play" name= "Play" Name= "Sleep"

4. Gossip:

Originally wanted to paste the code of the Anti-compilation, later code see Finally, there is a new 1 (this, sortvalues). What a puzzle! Later downloaded the Jd-gui, open the dom4j jar package, the code is not like that at all. Forget it, don't plan to analyze it again.

However, this is called Enhanced Class Decompiler Eclipse plug-in code, the format is really not flattering, anti-compiled code and Jd-gui will be different.

]

Working with DOM4J XML (3)