struts2中标签的使用

MyComparator.java

 

public class MyComparator implements Comparator<Object>  {

 public int compare(Object o1, Object o2) {
  
  XmxxBean xmxxBean1 = (XmxxBean)o1 ;
  XmxxBean xmxxBean2 = (XmxxBean)o2 ;
  //没啥用
//  xmxxBean1 = (XmxxBean)o2;
//  xmxxBean2 = (XmxxBean)o1;
  
  //按id进行排序
//  return xmxxBean1.getXMXXID() - (xmxxBean2.getXMXXID());
  //按名称进行排序
  return xmxxBean2.getXMMC().compareToIgnoreCase(xmxxBean1.getXMMC());
 }

}

 

SortTagAction.java

 

public class SortTagAction extends ActionSupport {
 
 @Override
 public String execute() throws Exception {  
  
  List<XmxxBean> list_value = new ArrayList<XmxxBean>();
  list_value.add(new XmxxBean(1,"XMXXBH002","OA"));
  list_value.add(new XmxxBean(3,"XMXXBH001","ERP"));
  list_value.add(new XmxxBean(2,"XMXXBH005","EXAM"));
  list_value.add(new XmxxBean(5,"XMXXBH004","ZC"));
  list_value.add(new XmxxBean(4,"XMXXBH003","HM"));
  HttpServletRequest request = ServletActionContext.getRequest();
//  for(int i = 0 ; i<list_value.size() ; i++){
//   System.out.println(list_value.get(i).getXMXXID());
   request.setAttribute("list_values", list_value);
//  }
  
  return "sortTag";
 }
 
}

struts.xml

 

<action name="sortTag" class="com.butone.struts2.taguser.SortTagAction">
    <result name="sortTag">/taguser/sortTag.jsp</result>
   </action>

 

sortTag.jsp

 

<s:form>
   <s:bean id="mycomparator" name="com.butone.struts2.taguser.MyComparator" />
   <table border="1" width="200">
    <s:sort source="#request.list_values"
     comparator="#mycomparator" >
     <s:iterator status="st" >
      <!-- even索引是否为偶数
        odd索引是否为奇数
        count返回当前迭代了几个元素
        index返回当前元素的索引
        first当前是否是第一个元素
        last当前是否是最后一个元素
       -->
      <tr <s:if test="#st.even">style="background-color:#bbbbbb"</s:if>>
       <td>
        <A href="#"><s:property value="XMMC"/></A>
       </td>
      </tr>
     </s:iterator>
    </s:sort>
   </table>
  </s:form>

 

 

 

http://localhost:8080/struts2/sortTag.action