[轉]struts2中s:select標籤的使用

1.第一個例子：

 <s:select list="{'aa','bb','cc'}" theme="simple" headerKey="00" headerValue="00"></s:select>

 2.第二個例子：

 <s:select list="#{1:'aa',2:'bb',3:'cc'}"  label="abc" listKey="key" listValue="value"  headerKey="0" headerValue="aabb">

 3.第三個例子：

 <%
 java.util.HashMap map = new java.util.LinkedHashMap();
 map.put(1,"aaa");
 map.put(2,"bbb");
 map.put(3,"ccc");
 request.setAttribute("map",map);
 request.setAttribute("aa","2");
 %>
 <s:select list="#request.map"  label="abc" listKey="key" listValue="value"
  value="#request.aa"  headerKey="0" headerValue="aabb"></
 s:select
 >
 headerKey headerValue 爲設置缺省值
 摘抄自 http://www.cnblogs.com/modou/articles/1326683.html

 4.第四個例子

 public class Program implements Serializable {
     /**    serialVersionUID */
     private static final long serialVersionUID = 1L;
     private int programid;
     private String programName;
     public int getProgramid() {
         return programid;
     }
     public void setProgramid(int programid) {
         this.programid = programid;
     }
         public String getProgramName() {
         return programName;
     }
     public void setProgramName(String programName) {
         this.programName = programName;
     }
 }

 在 xxx extends  extends ActionSupport {
     private  List<Program> programs ;
        public List<Program> getPrograms() {
         return programs;
     }
     public void setPrograms(List<Program> programs) {
             this.programs = programs;
     }
 }
 在jsp頁面
       <s:select list="programs "  listValue="programName " listKey="programid "  name="program" id="program"
              headerKey="0l" headerValue="    "   value="bean.programid "
              ></s:select> 
 紅色部分爲在action裏面的list,黃色爲<option value="xxx">value</option>對應bean裏面的字段programName
 綠色爲<option value="xxx",對應bean裏面的字段programid

紫色爲設定select被選中的值,s:select 會自動在　bean選中　key對應的值