分页功能中的核心bean

package com.njupt.pojo;


import java.util.List;


/**
 * 分页功能中的一页的信息
 * 
 * 
 * 
 */
public class PageBean {


// 指定的或是页面参数
private int currentPage; // 当前页
private int pageSize; // 每页显示多少条


// 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(包含)
private int endPageIndex; // 页码列表的结束索引(包含)


/**
* 只接受前4个必要的属性,会自动的计算出其他3个属生的值

* @param currentPage
* @param pageSize
* @param recordCount
* @param recordList
*/
public PageBean(int currentPage, int pageSize, int recordCount, List recordList) {
this.currentPage = currentPage;
this.pageSize = pageSize;
this.recordCount = recordCount;
this.recordList = recordList;


// 计算总页码
pageCount = (recordCount + pageSize - 1) / pageSize;


// 计算 beginPageIndex 和 endPageIndex
// >> 总页数不多于10页,则全部显示
if (pageCount <= 10) {
beginPageIndex = 1;
endPageIndex = pageCount;
}
// >> 总页数多于10页,则显示当前页附近的共10个页码
else {
// 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;
// 当前面的页码不足4个时,则显示前10个页码
if (beginPageIndex < 1) {
beginPageIndex = 1;
endPageIndex = 10;
}
// 当后面的页码不足5个时,则显示后10个页码
if (endPageIndex > pageCount) {
endPageIndex = pageCount;
beginPageIndex = pageCount - 10 + 1;
}
}
}


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;
}


}

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