用JSTL迭代List(hql组装出来的对象)和HashMap以及List(对应表记录)

1.迭代List(hql组装出来的对象)
hql:
String hql = "select (select b.rotaname from RunRota b where b.rotaid=a.rotaid),a.classid,a.classname from RunClass a where a.rotaid in "
+" (select c.rotaid from PlanRota c where "
+" c.startdate = (select max(b.startdate) from PlanRota b where b.factoryid="+runFactoryId+" and b.startdate < current_date) and  c.factoryid="+runFactoryId+") order by a.orderno ";

在ACTION中设值:
request.setAttribute("classes", classes);

迭代方法:

<select name="classId" style="width:140px">
						<c:forEach var="class" items="${classes}">
							<c:choose>
								<c:when test="${runReturncardForm.classId==class[1]}">
									<option value="${class[1]}" selected>
										${class[0]}|${class[2]}
									</option>
								</c:when>
								<c:otherwise>
									<option value="${class[1]}">
										${class[0]}|${class[2]}
									</option>
								</c:otherwise>
							</c:choose>
						</c:forEach>
</select>

说明:这个时候是根据List的下标对值进行引用的

2.迭代HashMap
在ACTION中设值,factories为一个构造好的HashMap:
在ACTION中设值:
request.setAttribute("factories",factories);
迭代方法:

<select name = "factoryid" id =  "factoryid" style="width:138px">
						<c:forEach var="factory" items="${factories}">
							<option value="${factory.key}">
								${factory.value}
							</option>
						</c:forEach>	
					</select>

说明:这个时候是根据HashMap的key和value对值进行引用的

1.迭代List(对应表记录)
这种情况最常见,也就是直接迭代我们从后台组装好的一条一条的记录对象
在ACTION中设值:
returnCards = returncardService.findReturnCard();
request.setAttribute("returnCards ",returnCards );

<c:forEach var="returnCard" items="${returnCards}">
    	<tr class="trbai">
    		<TD height="27" align="center" noWrap>${returnCard.returntime}</td>
    		<TD height="27" align="center" noWrap>
    		<c:forEach var="returnerName" items="${returnerNameMap}">
    			<c:if test="${returnCard.returner == returnerName.key}">
    				${returnerName.value}
    			</c:if>
    		</c:forEach>
    		</td>
    		<TD height="27" align="center" noWrap>
    		${returnCard.cardcode}
    		</td>
    		<TD height="27" align="center" noWrap>
    		<a href="javascript:dispDetail('${returnCard.tid}');" >查看详细</a>
    		</td>
    	</tr>
    	
    	</c:forEach>

说明:这个时候是根据对象的属性对值进行引用的