请教页面上根据多选框里选项内容的查询问题？多谢！

JSP页面：
<SELECT NAME="city" id="city" SIZE="4" MULTIPLE style="width:120" >
</SELECT>
<!--city可以根据省的动态下拉联动，添加到city里去，city里可以有多个值-->
后台处理的部分代码：
public List searchJob(HttpServletRequest request) throws Exception
{
String city[] = request.getParameterValues("city");
Criteria crit = new Criteria();
List list = null;
int size = city.length;
if (size > 0)
{
for (int i = 0; i < size; i++)
{
crit.and(CorpJobPeer.CJOB_CITY, city);
}
}
//执行查询
try
{
list = CorpJobPeer.doSelect(crit);
crit.clear();
}
catch (Exception e)
{
e.printStackTrace();
log.error(e.getMessage());
}
return list;
}
这样在查询时总查不到，请高手指点！多谢！