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;
}
}
//java/6142