java bootstrap分页

样式如下

datumMap.total总共多少页

datumMap.page第几页

    <nav class="pull-right">
				<ul class="pagination">
				<!-- 是否能点击前一页 -->
				<c:choose>
					<c:when test="${datumMap.page==1}">
					<li class="disabled">
						<a aria-label="Previous" href="javascript:void(0);">
							<span aria-hidden="true">«</span>
						</a>
					</li>
					</c:when>
					<c:otherwise>
					<li>
						<a aria-label="Previous" href="${ctx_path}/datum/show_datum?page=${datumMap.page-1}">
							<span aria-hidden="true">«</span>
						</a>
					</li>
					</c:otherwise>
				</c:choose>
				<!-- 显示可以点击的页数 -->
				<c:choose>
					<c:when test="${datumMap.total<=5}">
						<c:forEach var="p" begin="1" end="${datumMap.total}">
						<li <c:if test="${datumMap.page==p}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=${p}">${p}</a></li>
						</c:forEach>
					</c:when>
					<c:otherwise>
						<c:choose>
							<c:when test="${datumMap.page < 4 && datumMap.page > 0}"><!-- 1-3页 -->
							<li <c:if test="${datumMap.page == 1}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=1">1</a></li>
							<li <c:if test="${datumMap.page == 2}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=2">2</a></li>
							<li <c:if test="${datumMap.page == 3}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=3">3</a></li>
							<li <c:if test="${datumMap.page == 4}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=4">4</a></li>
							<li><a href="javascript:void(0);" class="disabled">...</a></li>
							<li><a href="${ctx_path}/datum/show_datum?page=${datumMap.total}">${datumMap.total}</a></li>
							</c:when>
							<c:when test="${datumMap.page < datumMap.total-2}">
							<li><a href="${ctx_path}/datum/show_datum?page=${datumMap.page-2}">${datumMap.page-2}</a></li>
							<li><a href="${ctx_path}/datum/show_datum?page=${datumMap.page-1}">${datumMap.page-1}</a></li>
							<li class="active"><a href="${ctx_path}/datum/show_datum?page=${datumMap.page}">${datumMap.page}</a></li>
							<li><a href="${ctx_path}/datum/show_datum?page=${datumMap.page+1}">${datumMap.page+1}</a></li>
							<li><a href="javascript:void(0);" class="disabled">...</a></li>
							<li><a href="${ctx_path}/datum/show_datum?page=${datumMap.total}">${datumMap.total}</a></li>
							</c:when>
							<c:otherwise>
							<li><a href="${ctx_path}/datum/show_datum?page=${datumMap.total-4}">${datumMap.total-4}</a></li>
							<li><a href="${ctx_path}/datum/show_datum?page=${datumMap.total-3}">${datumMap.total-3}</a></li>
							<li <c:if test="${datumMap.page==datumMap.total-2}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=${datumMap.total-2}">${datumMap.total-2}</a></li>
							<li <c:if test="${datumMap.page==datumMap.total-1}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=${datumMap.total-1}">${datumMap.total-1}</a></li>
							<li <c:if test="${datumMap.page==datumMap.total}">class="active"</c:if>><a href="${ctx_path}/datum/show_datum?page=${datumMap.total}">${datumMap.total}</a></li>
							</c:otherwise>
						</c:choose>
					</c:otherwise>
				</c:choose>
				<!-- 是否能点击后一页 -->
				<c:choose>
					<c:when test="${datumMap.page==datumMap.total}">
					<li class="disabled">
						<a aria-label="Next" href="javascript:void(0);">
							<span aria-hidden="true">»</span>
						</a>
					</li>
					</c:when>
					<c:otherwise>
					<li>
						<a aria-label="Next" href="${ctx_path}/datum/show_datum?page=${datumMap.page+1}">
							<span aria-hidden="true">»</span>
						</a>
					</li>
					</c:otherwise>
				</c:choose>
				</ul>
			</nav>