Velocity 5 application example-get the index of the current iteration

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# Foreach ($ key in $ map. keySet () $ velocityCount> $ key: $ map. get ($ key) # end $ velocityCount get the current iterative index velocityCount variable name can be obtained through directive. foreach. counter. modify the name attribute, for example, directive. foreach. counter. name = index, which can be accessed later through $ index. The index of iteration starts from 1 by default. we can modify it through directive. foreach. in1_. value = 0.

Console output

1> key4 : value42> key3 : value33> key2 : value24> key1 : value1

Modify Index variable name

Add configuration in attribute file

# Modify the index variable name directive. foreach. counter. name = indexindex. vm # foreach ($ key in $ map. keySet () $ index >>$ key: $ map. get ($ key) # end # Modify the default value of the iterative index direve VE. foreach. counter. initial. value = 0

Template

#foreach($key in $map.keySet())$index >>> $key : $map.get($key)#end

Console output

0 >>> key4 : value41 >>> key3 : value32 >>> key2 : value23 >>> key1 : value1//2 Create aContext objectVelocityContextcontext = new VelocityContext();//3 Add you dataobjects to this contextMap
 
  map = new HashMap
  
   ();map.put("key1","value1");map.put("key2","value2");map.put("key3","value3");map.put("key4","value4");context.put("map",map);//4 Choose atemplateTemplatetemplate = Velocity.getTemplate("index.vm");//5 Merge thetemplate and you data to produce the outputStringWriter sw= new StringWriter();template.merge(context,sw);sw.flush();System.out.println(sw.toString());
  
 

Template

#foreach($keyin $map.keySet())$velocityCount > $key : $map.get($key)#end=============#foreach($keyin $map.keySet())$index >>> $key :$map.get($key)#end

The above is the fifth application example of velocity-get the index content of the current iteration. For more information, see PHP Chinese website (www.php1.cn )!