JAVA分页实现,用java写一个分页功能的代码

package com.page;

public class PageUtil {

// 每页显示的条数
private int pageSize;
// 总共的条数
private int recordCount;
// 当前页面
private int currentPage;

public PageUtil(int pageSize, int recordCount, int currentPage) {
this.pageSize = pageSize;
this.recordCount = recordCount;
setCurrentPage(currentPage);
}

// 构造方法
public PageUtil(int pageSize, int recordCount) {
this(pageSize, recordCount, 1);
}

// 总页数
public int getPageCount() {
// 总条数/每页显示的条数=总页数
int size = recordCount / pageSize;
// 最后一页的条数
int mod = recordCount % pageSize;
if (mod != 0)
size++;
return recordCount == 0 ? 1 : size;
}

// 包含，起始索引为0
public int getFromIndex() {
// System.out.println("from index:"+(currentPage-1) * pageSize);
return (currentPage - 1) * pageSize;
}

// 不包含
public int getToIndex() {
// System.out.println("to index:"+Math.min(recordCount, currentPage *
// pageSize));
return Math.min(recordCount, currentPage * pageSize);
}

// 得到当前页
public int getCurrentPage() {
return currentPage;
}

// 设置当前页
public void setCurrentPage(int currentPage) {
int validPage = currentPage <= 0 ? 1 : currentPage;
validPage = validPage > getPageCount() ? getPageCount() : validPage;
this.currentPage = validPage;
}

// 得到每页显示的条数
public int getPageSize() {
return pageSize;
}

// 设置每页显示的条数
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}

// 得到总共的条数
public int getRecordCount() {
return recordCount;
}

// 设置总共的条数
public void setRecordCount(int recordCount) {
this.recordCount = recordCount;
}
}

 

----------------------------------------------------------------------------------------------------------------------------------
下面的代码是放在jsp里面的
----------------------------------------------------------------------------------------------------------------------------------
< %
PublishersDAO dao = PublishersDAO.getInstance();
List records = dao.getModels();
String pageStr = request.getParameter("page");
int currentPage = 1;
if (pageStr != null)
currentPage = Integer.parseInt(pageStr);
PageUtil pUtil = new PageUtil(10, records.size(), currentPage);
currentPage = pUtil.getCurrentPage();
%>
-----------下面这个是放在有变量的上面-------------------------------------------------------------------------------------------

< %
for (int i = pUtil.getFromIndex(); i < pUtil.getToIndex(); i++) {
PublisherModel model = (PublisherModel) records.get(i);
%>
中间是删除修改之类的代码
< %}%>
------------这个是结尾的----------------------------------------------------------------------------------------------------------


记录总数<%=pUtil.getRecordCount()%>条 当前页/总页数<%=currentPage%>
/<%=pUtil.getPageCount()%>每页显示<%=pUtil.getPageSize()%>条
首页
< a href="publishers.jsp?page=<%=(currentPage - 1)%>">上页
< a href="publishers.jsp?page=<%=(currentPage + 1)%>">下页
< a href="publishers.jsp?page=<%=pUtil.getPageCount()%>">末页
< /td>