<% for (int j = 0; userList != null && j < userList.size(); j++) { DynaBean user = (DynaBean) userList.get(j); String userId = StringUtil.getStr(user.get("pk")); String userName = StringUtil.getStr(user.get("cname")); %> <TR class="tr_form"> <TD height="24" class="txt"> <INPUT type="radio" name="userId" checked id="userId<%=j %>" value="<%=userId %>"> <%=userName %></TD> </TR> <% } %> 怎么让第一个默认选中