分页需要的技术点：1.前台分页标签的使用
2.前台上一页，下一页显示的业务逻辑
3.MSQL用到的语句 limit
4.封装pageBean对象
这个是PageBean用到的
分页公式：
- int totalPageNum = (totalRecord pageSize - 1) / pageSize;
package com.itheima.vo;
import java.util.ArrayList;
import java.util.List;
import com.itheima.domain.Product;
public class PageBean<T> {
//当前页
private int currentPage;
//当前页显示的条数
private int currentCount;
//总条数
private int totalCount;
//总页数
private int totalPage;
//每页显示的数据
private List<T> productList = new ArrayList<T>();
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
public int getCurrentCount() {
return currentCount;
}
public void setCurrentCount(int currentCount) {
this.currentCount = currentCount;
}
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount) {
this.totalCount = totalCount;
}
public int getTotalPage() {
return totalPage;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public List<T> getProductList() {
return productList;
}
public void setProductList(List<T> productList) {
this.productList = productList;
}
}前台页面上的分页标签显示逻辑
代码语言：javascript复制 <!--分页 -->
<div style="width: 380px; margin: 0 auto; margin-top: 50px;">
<ul class="pagination" style="text-align: center; margin-top: 10px;">
<!-- 上一页 -->
<!-- 判断当前页是否是第一页 -->
<c:if test="${pageBean.currentPage==1 }">
<li class="disabled">
<a href="javascript:void(0);" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
</c:if>
<c:if test="${pageBean.currentPage!=1 }">
<li>
<a href="${pageContext.request.contextPath }/productList?currentPage=${pageBean.currentPage-1}" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
</c:if>
<c:forEach begin="1" end="${pageBean.totalPage }" var="page">
<!-- 判断当前页 -->
<c:if test="${pageBean.currentPage==page }">
<li class="active"><a href="javascript:void(0);">${page}</a></li>
</c:if>
<c:if test="${pageBean.currentPage!=page }">
<li><a href="${pageContext.request.contextPath }/productList?currentPage=${page}">${page}</a></li>
</c:if>
</c:forEach>
<!-- 判断当前页是否是最后一页 -->
<c:if test="${pageBean.currentPage==pageBean.totalPage }">
<li class="disabled">
<a href="javascript:void(0);" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
</c:if>
<c:if test="${pageBean.currentPage!=pageBean.totalPage }">
<li>
<a href="${pageContext.request.contextPath }/productList?currentPage=${pageBean.currentPage 1}" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
</c:if>
</ul>
</div>
<!-- 分页结束 -->
