The fifth application example of velocity---get the index of the current iteration

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

#foreach($key in $map.keySet()) $velocityCount > $key : $map.get($key) #end $velocityCount获得当前迭代索引 velocityCount变量名可以通过directive.foreach.counter.name属性修改， 如：directive.foreach.counter.name=index,以后可以通过$index进行访问。 迭代的索引默认从1开始，我们可以通过directive.foreach.inital.value=0进行修改。

Console output

1> key4 : value4 2> key3 : value3 3> key2 : value2 4> key1 : value1

Modify the index variable name

Add configuration in the properties file

#修改索引变量名 directive.foreach.counter.name=index index.vm #foreach($key in $map.keySet()) $index >>> $key : $map.get($key) #end #修改迭代索引的默认值 directive.foreach.counter.initial.value=0

Template

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

Console output

0 >>> key4 : value4 1 >>> key3 : value3 2 >>> key2 : value2 3 >>> key1 : value1 //2 Create aContext object VelocityContextcontext = new VelocityContext(); //3 Add you dataobjects to this context Mapmap = new HashMap(); map.put("key1","value1"); map.put("key2","value2"); map.put("key3","value3"); map.put("key4","value4"); context.put("map",map); //4 Choose atemplate Templatetemplate = Velocity.getTemplate("index.vm"); //5 Merge thetemplate and you data to produce the output StringWriter 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 of velocity Application example---obtain the index content of the current iteration. For more related content, please pay attention to the PHP Chinese website (m.sbmmt.com)!