java分页实现

package com.tradingplatform.dto;

import java.util.List;

/**
 * 分页原理页面传送数据的Dto
 * @param <T>：传送的数据的类型
 */
public class PageJumpDataDto<T> {
	private int currentPage=1;	//当前页
	private int totalPage=0;	//总共页
	private int totalRecord=0;	//总记录数
	private List<T> listData;	//数据
	private int pageSize=6;		//每页记录数
	
	public PageJumpDataDto() {}

	public PageJumpDataDto(int currentPage, int totalPage, int totalRecord, List<T> listData, int pageSize) {
		super();
		this.currentPage = currentPage;
		this.totalPage = totalPage;
		this.totalRecord = totalRecord;
		this.listData = listData;
		this.pageSize = pageSize;
	}
	
	public PageJumpDataDto(int currentPage, List<T> listData) {
		if(listData==null) return;
		this.totalRecord = listData.size();
		//得到总页数
		this.totalPage = this.totalRecord/this.pageSize;
		if(this.totalRecord%this.pageSize!=0) this.totalPage+=1;
		//得到当前页数
		if(this.totalPage<currentPage){
			this.currentPage=this.totalPage;
		}else{
			this.currentPage=currentPage;
		}
		if(this.currentPage<1) this.currentPage=1;
		//得到截取的展示数据
		int begin=this.pageSize*(this.currentPage-1);
		int end= (this.pageSize*this.currentPage)>this.totalRecord?this.totalRecord:(this.pageSize*this.currentPage);
		this.listData=listData.subList(begin, end);
	}
	
	public PageJumpDataDto(int currentPage, List<T> listData,int pageSize) {
		if(listData==null) return;
		this.pageSize=pageSize;
		this.totalRecord = listData.size();
		//得到总页数
		this.totalPage = this.totalRecord/this.pageSize;
		if(this.totalRecord%this.pageSize!=0) this.totalPage+=1;
		//得到当前页数
		if(this.totalPage<currentPage){
			this.currentPage=this.totalPage;
		}else{
			this.currentPage=currentPage;
		}
		if(this.currentPage<1) this.currentPage=1;
		//得到截取的展示数据
		int begin=this.pageSize*(this.currentPage-1);
		int end= (this.pageSize*this.currentPage)>this.totalRecord?this.totalRecord:(this.pageSize*this.currentPage);
		this.listData=listData.subList(begin, end);
	}

	public int getCurrentPage() {
		return currentPage;
	}
	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}
	public int getTotalPage() {
		return totalPage;
	}
	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}
	public int getTotalRecord() {
		return totalRecord;
	}
	public void setTotalRecord(int totalRecord) {
		this.totalRecord = totalRecord;
	}

	public List<T> getListData() {
		return listData;
	}

	public void setListData(List<T> listData) {
		this.listData = listData;
	}

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