java 分页工具类 （非常实用的工具类 留用）

import java.util.List;

/**
 * 分页工具类
 * 
 * @author 
 * 
 */
public class PageBean<T> {

	private List<T> pageData;
	private Integer currentPage = Integer.valueOf(1);
	private Integer pageSize = Integer.valueOf(10);
	private Integer totalCount;

	public int getPageCount() {
		if (this.totalCount.intValue() % this.pageSize.intValue() == 0) {
			return this.totalCount.intValue() / this.pageSize.intValue();
		}
		return this.totalCount.intValue() / this.pageSize.intValue() + 1;
	}

	public PageBean(List<T> pageData, Integer totalCount) {
		this.pageData = pageData;
		this.totalCount = totalCount;
	}

	public PageBean() {
	}

	public boolean isFirst() {
		return (this.currentPage.intValue() == 1)
				|| (this.totalCount.intValue() == 0);
	}

	public boolean isLast() {
		return (this.totalCount.intValue() == 0)
				|| (this.currentPage.intValue() >= getPageCount());
	}

	public boolean isHasNext() {
		return this.currentPage.intValue() < getPageCount();
	}

	public boolean isHasPrev() {
		return this.currentPage.intValue() > 1;
	}

	public Integer getNextPage() {
		if (this.currentPage.intValue() >= getPageCount()) {
			return Integer.valueOf(getPageCount());
		}
		return Integer.valueOf(this.currentPage.intValue() + 1);
	}

	public Integer getPrevPage() {
		if (this.currentPage.intValue() <= 1) {
			return Integer.valueOf(1);
		}
		return Integer.valueOf(this.currentPage.intValue() - 1);
	}

	public List<T> getPageData() {
		return this.pageData;
	}

	public void setPageData(List<T> pageData) {
		this.pageData = pageData;
	}

	public Integer getCurrentPage() {
		return this.currentPage;
	}

	public void setCurrentPage(Integer currentPage) {
		this.currentPage = currentPage;
	}

	public Integer getPageSize() {
		return this.pageSize;
	}

	public void setPageSize(Integer pageSize) {
		this.pageSize = pageSize;
	}

	public Integer getTotalCount() {
		return this.totalCount;
	}

	public void setTotalCount(Integer totalCount) {
		this.totalCount = totalCount;
	}

}

/**
	 * 返回新闻选项卡
	 * @param model
	 * @return
	 */
	@RequestMapping("/news")
	public String news(Model model,HttpServletRequest req){
		String currentPage = req.getParameter("currentPage");
		PageBean<News> pageBean = new PageBean<News>();
		pageBean.setCurrentPage(Integer.parseInt(currentPage));//默认当前页是第一页
		pageBean.setPageSize(3);//每页显示条数
		
//		List<News> news = newsmapper.selectAll();
		int iStart = (pageBean.getCurrentPage()-1)*pageBean.getPageSize()+1;
		int iEnd = pageBean.getCurrentPage()*pageBean.getPageSize()+1;
		List<News> news = newsmapper.query(iStart, iEnd, null);
		for(News n : news){
			n.setCategory(categorymapper.selectByPrimaryKey(n.getCid()));
			n.setStateEnum(StateEnum.getStateEnum(n.getState()));
		}
		pageBean.setPageData(news);
		pageBean.setTotalCount(newsmapper.getCounts(null));
		model.addAttribute("model",news);
		model.addAttribute("pageBean",pageBean);
		model.addAttribute("pageCount",pageBean.getPageCount());
		model.addAttribute("NextPage",pageBean.getNextPage());
		model.addAttribute("PrevPage",pageBean.getPrevPage());
		return "/back/news/list.jsp";
	}
	

jsp页面调用

总记录数${pageBean.totalCount} 
 当前页${pageBean.currentPage} 
 每页显示记录数：${pageBean.pageSize } 
 总页数${pageCount} 
上一页${PrevPage} 
下一页${NextPage} 

 <nav aria-label="Page navigation" >
  <ul class="pagination">
    <li>
      <a href="javascript:;" aria-label="Previous"
      onclick="loadPage('<%=basePath%>back/news?currentPage=${PrevPage}')">
        <span aria-hidden="true">&laquo;</span>
      </a>
    </li>
    <c:forEach begin="1" end="${pageCount}" var="i">
    <li><a href="javascript:;" onclick="loadPage('<%=basePath%>back/news?currentPage=${i}')">${i}</a></li>
     </c:forEach>
    <li>
      <a href="javascript:;" aria-label="Next" onclick="loadPage('<%=basePath%>back/news?currentPage=${NextPage}')">
        <span aria-hidden="true">&raquo;</span>
      </a>
    </li>
  </ul>
</nav>
    
    <script type="text/javascript">
    function loadPage(url) {
				$('#loadPage').html("");
				$.ajax({
					type : "POST",
					url : url,
					data : {},
					dataType : "html", //返回值类型       使用json的话也可以，但是需要在JS中编写迭代的html代码，如果格式样式
					cache : false,
					success : function(data) {
						//var json = eval('('+msg+')');//拼接的json串
						$('#loadPage').empty().html(data);
					},
					error : function(error) {
						alert(error);
					}
				});
			}
    </script>