比较两个对象discs、outlets中的元素是否相等。相同则相应的checkbox为checked
<div id="div1" name="div1" class="area" style="position:relative;">
<c:if test="${!empty outlets}">
<dl>
<c:forEach items="${outlets}" var="outlet">
<c:set var="has" value="0" ></c:set>
<dd>
<c:if test="${!empty discs}">
<c:forEach items="${discs}" var="discs">
<c:if test="${discs.outlet==outlet.outlet}">
<c:set var="has" value="1"></c:set>
</c:if>
</c:forEach>
</c:if>
<input id="outlet" type="checkbox" value="${outlet.outlet }" id="${outlet.outlet }" name="outlet" <c:if test="${has==1}">checked="checked"</c:if> />
<label for="${outlet.outlet }">${outlet.outlet }-${outlet.desc1 }</label>
</dd>
</c:forEach>
</dl>
</c:if>
</div>
Controller传输discs,outlets
List<DiscS> discs=discSService.getDiscSByCode(code);
/* System.out.println(discs.get(0).getOutlet()+"@@");
System.out.println(discs.get(1).getOutlet()+"!!");
System.out.println(discs.get(2).getOutlet()+"##");*/
model.addAttribute("discs",discs);
List<Outlet> outlets = outletService.getOutlets();
/*System.out.println(outlets.get(0).getOutlet());
System.out.println(outlets.get(1).getOutlet());
System.out.println(outlets.get(2).getOutlet());*/
model.addAttribute("outlets", outlets);