package sample;      
      public class HotlineDTO implements Serializable{
        private String country = "";
       private String pno = "";        
        /**
         * Method HotlineActionForm
         *
         *
         */
        public HotlineDTO () {
             super();
      }

        
        public void setCountry(String country) {
                this.country = country; 
        }

        public void setPno(String pno) {
                this.pno = pno; 
        }

        public String getCountry() {
                return (this.country); 
        }

        public String getPno() {
                return (this.pno); 
        }        
      }

package sample;
      import org.apache.struts.action.ActionForm;
      public class HotlineActionForm extends ActionForm{
        private String country = "";
        private String pno = "";        
        /**
         * Method HotlineActionForm
         *
         *
         */
        public HotlineActionForm() {
                super();
        }

        
        public void setCountry(String country) {
                this.country = country; 
        }

        public void setPno(String pno) {
                this.pno = pno; 
        }

        public String getCountry() {
                return (this.country); 
        }

        public String getPno() {
                return (this.pno); 
        }        
      }
  

     public class SearchHotlineAction extends Action {
     public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
      HttpServletResponse response) throws Exception {
        String target = "";
        try{
         //调用HotlineDAO检索hotline
         String country=((HotlineActionForm)form).getCountry();
         List hotlineList = HotlineDAO.getHotlineList(country);
         if(hotlineList!=null && hotlineList.size()>0){
            request.setAttribute("hotlineList",hotlineList);
            target = "hotlineList";
         }else{
            target = "notfound";
         }
        }catch(Exception ex){
           ....
        }
                
        
     }

<struts-config>
   
   <form-beans>
     <form-bean name="hotlineActionForm" type="sample.HotlineActionForm" />
       .......
   </form-beans>
  <action-mappings>
     <action path="/SearchHotline"
           name="hotlineActionForm"
           type="sample.SearchHotlineAction "
                     scope="request"                                   
                   validate="false"> 
      <forward name="hotlineList" path="/hotlineList.jsp"/>        
      <forward name="notfound" path="/searchHotline.jsp"/>
   </action>
    .....
  <action-mappings>
   ........
 <struts-config>

public class SearchHotlineAction extends MockStrutsTestCase {

     public void setUp()throws Exception{
     }

     public void tearDown()throws Exception{
     }

    public void testSearchHotline() throws Exception{
    setRequestPathInfo("/SearchHotline.do");
    addRequestParameter("country", "CN");
    actionPerform();
    }
    }

String country=((HotlineActionForm)form).getCountry();

< c:choose >
   < c:when  test ="${p.type == 'mandatory'}" >
     < td >
      < input  type ="checkbox"  name ="nodeRPMS"
    style ="VISIBILITY: hidden; "
    checked ="true"
    value ="<c:out value=" ${p.rpmName}" /> "/>
     </ td >
   </ c:when >

    < c:when  test ="${p.type == 'default'}" >
     < td >
       < input  type ="checkbox"
       name ="nodeRPMS"   checked =true  
        value ="<c:out  value=" ${p.rpmName}" /> "/>
     </ td >
    </ c:when >

   < c:when  test ="${p.type == 'optional'}" >
     < td >  
      < input  type ="checkbox"  name ="nodeRPMS"
       value ="<c:out value=" ${p.rpmName}" /> "/>
     </ td >
   </ c:when >
</ c:choose >

在处理层，采用struts的form来接受，定义string [] nodeRPMs接受即可
接受后存在数据库里，然后读出来在显示在页面上

在修改页面，首先应该有全部的checkbox，同时用户选中的应该已经被打勾（这来自数据库读出的记录）,经过中午的查找资料
才知道可以使用mutilbox解决这个问题

< c:choose >
   < c:when test = " ${p.type == 'mandatory'} " >
     < td >
       < input type = " checkbox "  name = " nodeRPMS "
    style = " VISIBILITY: hidden;  "
     checked = " true "
    value = " <c:out value= " $ {p.rpmName} " /> " />
    </ td >
   </ c:when >

   < c:otherwise >
    < td >
       < html:multibox property = " nodeRPMS " >
       < c: out  value = " ${p.rpmName} " />
       </ html:multibox >     
    </ td >
   </ c:otherwise >
</ c:choose >

mutilbox会根据你读出的值来设定
 struts中的checkbox是单选的，它的值应该只有true和false或者yes no或者on off之分；
r如果希望使用一组可以多选的checkbox，在struts中的页面标签应该是html:multibox,它的用法：<html:multibox property="strArray" value="value1">或者
       <html:multibox property="strArray">value2</html:multibox>

真正载页面上使用时可能是这样：
<html:multibox property="strArray">a</html:multibox>
<html:multibox property="strArray">b</html:multibox>
<html:multibox property="strArray">c</html:multibox>

当然"strArray"一定是页面相对应的formbean中的一个属性，并且应该是数组：
private String[] strArray; //提供get set方法

这样，如果我们在页面上面选中了前两个，则strArray.length=2;strArray[0]里面的值是a,strArray[1]里面的值是b;
如果我们把form中的strArray设置为strArray[0]="b",strArray[1]="c",则转到页面之后，页面上只有后两项被选中
所以这样就可以解决问题了