java后台为前台JSP页面的SELECT标签设置值

时间:2022-12-26 15:48:19

后台写法:
List<LabelValueBean> roleList = new ArrayList<LabelValueBean>();
   request.setAttribute("roleList", roleList);
   dto = ctlBL.getUserRolesNotInProcess(dto);
   List<UserRoleInfo> list = dto.getUserRoleList();
   for(UserRoleInfo info : list){
    //前面的是页面显示的值,后面的是要存储的值
    roleList.add(new LabelValueBean(info.getRolename(), info.getRoleid().toString()));
   }
   if(roleList.isEmpty()){
    roleList.add(new LabelValueBean("", ""));
   }
页面写法:
<html:select
  property="prroleid" style="width: 120px;"
  errorStyleClass="inputError imeActive" tabindex="2"
  onchange="changePrRolename()">
  <html:options collection="roleList" property="value" name=""
   labelProperty="label"/>
 </html:select>

 

原理就是在后台做一个LabelValueBean的list,发到前台的option处,通过标签自动进行值的处理~~~