Page类

package com.oaquery.module.forumreply.entity;


import java.util.List;


/**
 * 分页的Page类
 * @version 2016-11-01 
 * @author liuyy 
 */
@SuppressWarnings("unchecked")
public class Page {


// 传递的参数或配置的值
private int currentPage; // 当前页
private int pageSize = 10; // 每页显示多少条记录


// 查询数据库
private int recordCount; // 总记录数
private List recordList; // 本页的数据列表


// 计算
private int pageCount; // 总页数
private int beginPageIndex; // 页码列表的开始索引
private int endPageIndex; // 页码列表的结束索引


/**
* 只接受4个必要的属性值，会自动的计算出其他3个属性的值
* 
* @param currentPage
* @param pageSize
* @param recordCount
* @param recordList
*/
public Page(int currentPage, int pageSize, int recordCount, List recordList) {
this.currentPage = currentPage;
this.pageSize = pageSize;
this.recordCount = recordCount;
this.recordList = recordList;


// 计算 pageCount
this.pageCount = (recordCount + pageSize - 1) / pageSize;


// 计算beginPageIndex与endPageIndex
// 1、总页码数<=10，就全部显示
if (pageCount <= 10) {
beginPageIndex = 1;
endPageIndex = pageCount;
}
// 2、总页码数>10
else {
// 1，显示当前页附近的共10个页码（前4个+当前页+后5个）
beginPageIndex = currentPage - 4;
endPageIndex = currentPage + 5;
// 2，前面不足4个页码时，显示前10个页码
if (beginPageIndex < 1) {
beginPageIndex = 1;
endPageIndex = 10;
}
// 3，后面不足5个页码时，显示后10个页码
else if (endPageIndex > pageCount) {
endPageIndex = pageCount;
beginPageIndex = pageCount - 9; // 因为显示时包含两个边界，所以这里要减9。
}
}


}


public List getRecordList() {
return recordList;
}


public void setRecordList(List recordList) {
this.recordList = recordList;
}


public int getCurrentPage() {
return currentPage;
}


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


public int getPageCount() {
return pageCount;
}


public void setPageCount(int pageCount) {
this.pageCount = pageCount;
}


public int getPageSize() {
return pageSize;
}


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


public int getRecordCount() {
return recordCount;
}


public void setRecordCount(int recordCount) {
this.recordCount = recordCount;
}


public int getBeginPageIndex() {
return beginPageIndex;
}


public void setBeginPageIndex(int beginPageIndex) {
this.beginPageIndex = beginPageIndex;
}


public int getEndPageIndex() {
return endPageIndex;
}


public void setEndPageIndex(int endPageIndex) {
this.endPageIndex = endPageIndex;
}


}