我的项目中要用到分页功能，发现struts2居然没有相应的标签

后来在struts2的核心包中发现有Counter类。

org.apache.struts2.util.Counter

查看源码，原来它可以实现循环列出 1 2 3 4 5 6 7 8 9 10等等，源码如下：

public class Counter implements java.util.Iterator, Serializable {

     private static final long serialVersionUID = 2796965884308060179L;

     boolean wrap = false;

     // Attributes ----------------------------------------------------
     long first = 1;
     long current = first;
     long interval = 1;
     long last = -1;


     public void setAdd(long addition) {
         current += addition;
     }

     public void setCurrent(long current) {
         this.current = current;
     }

     public long getCurrent() {
         return current;
     }

     public void setFirst(long first) {
         this.first = first;
         current = first;
     }

     public long getFirst() {
         return first;
     }

     public void setInterval(long interval) {
         this.interval = interval;
     }

     public long getInterval() {
         return interval;
     }

     public void setLast(long last) {
         this.last = last;
     }

     public long getLast() {
         return last;
     }

     // Public --------------------------------------------------------
     public long getNext() {
         long next = current;
         current += interval;

         if (wrap && (current > last)) {
             current -= ((1 + last) - first);
         }

         return next;
     }

     public long getPrevious() {
         current -= interval;

         if (wrap && (current < first)) {
             current += (last - first + 1);
         }

         return current;
     }

     public void setWrap(boolean wrap) {
         this.wrap = wrap;
     }

     public boolean isWrap() {
         return wrap;
     }

     public boolean hasNext() {
         return ((last == -1) || wrap) ? true : (current <= last);
     }

     public Object next() {
         return new Long(getNext());
     }

我的项目中，实现代码如下：

<s:bean name="org.apache.struts2.util.Counter" id="counter">
			<s:param name="first" value="#first" />
			<s:param name="last" value="#zs" />
			<s:iterator>
				<s:a href="?dhname=mymes&name=allmes&pageid=%{#counter.current-1 }"><s:property value="#counter.current-1"/></s:a>&nbsp;&nbsp;
			</s:iterator>
		</s:bean>

first表示起始数，第一个数字显示几

zs表示结束数，显示几个。

比如 2 3 4 5 6 7 8   表示起始为2，显示了7个