GraduationDesignThesisOpeni.../黑马毕业设计论文开题报告和代码/项目源代码/goods/WebRoot/jsps/pager/pager.jsp

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<script type="text/javascript">
function _go() {
var pc = $("#pageCode").val();//获取文本框中的当前页码
if(!/^[1-9]\d*$/.test(pc)) {//对当前页码进行整数校验
alert('请输入正确的页码!');
return;
}
if(pc > ${pb.tp}) {//判断当前页码是否大于最大页
alert('请输入正确的页码!');
return;
}
location = "${pb.url}&pc=" + pc;
}
</script>
<div class="divBody">
<div class="divContent">
<%--上一页 --%>
<c:choose>
<c:when test="${pb.pc eq 1 }"><span class="spanBtnDisabled">上一页</span></c:when>
<c:otherwise><a href="${pb.url }&pc=${pb.pc-1}" class="aBtn bold">上一页</a></c:otherwise>
</c:choose>
<%--我们需要计算页码列表的开始和结束位置即两个变量begin和end
计算它们需要通过当前页码!
1. 总页数不足6页--> begin=1, end=最大页
2. 通过公式设置begin和endbegin=当前页-1end=当前页+3
3. 如果begin<1那么让begin=1end=6
4. 如果end>tp, 让begin=tp-5, end=tp
--%>
<c:choose>
<c:when test="${pb.tp <= 6 }">
<c:set var="begin" value="1"/>
<c:set var="end" value="${pb.tp }"/>
</c:when>
<c:otherwise>
<c:set var="begin" value="${pb.pc-2 }"/>
<c:set var="end" value="${pb.pc + 3}"/>
<c:if test="${begin < 1 }">
<c:set var="begin" value="1"/>
<c:set var="end" value="6"/>
</c:if>
<c:if test="${end > pb.tp }">
<c:set var="begin" value="${pb.tp-5 }"/>
<c:set var="end" value="${pb.tp }"/>
</c:if>
</c:otherwise>
</c:choose>
<c:forEach begin="${begin }" end="${end }" var="i">
<c:choose>
<c:when test="${i eq pb.pc }">
<span class="spanBtnSelect">${i }</span>
</c:when>
<c:otherwise>
<a href="${pb.url }&pc=${i}" class="aBtn">${i }</a>
</c:otherwise>
</c:choose>
</c:forEach>
<%-- 计算begin和end --%>
<%-- 如果总页数<=6那么显示所有页码即begin=1 end=${pb.tp} --%>
<%-- 设置begin=当前页码-2end=当前页码+3 --%>
<%-- 如果begin<1那么让begin=1 end=6 --%>
<%-- 如果end>最大页那么begin=最大页-5 end=最大页 --%>
<%-- 显示点点点 --%>
<c:if test="${end < pb.tp }">
<span class="spanApostrophe">...</span>
</c:if>
<%--下一页 --%>
<c:choose>
<c:when test="${pb.pc eq pb.tp }"><span class="spanBtnDisabled">下一页</span></c:when>
<c:otherwise><a href="${pb.url }&pc=${pb.pc+1}" class="aBtn bold">下一页</a></c:otherwise>
</c:choose>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<%-- 共N页 到M页 --%>
<span>共${pb.tp }页</span>
<span>到</span>
<input type="text" class="inputPageCode" id="pageCode" value="${pb.pc }"/>
<span>页</span>
<a href="javascript:_go();" class="aSubmit">确定</a>
</div>
</div>