分页工具类

import java.io.Serializable;
import java.util.List;

/**
 * 分页辅助类
 * @author Administrator
 *
 */
public class PageUtils implements Serializable {
	
	private static final long serialVersionUID = -8741766802354222579L;
	
	//每页数量
	private int pageSize;
	
	//当前是多少页
	private int currentPage;
	
	//总数
	private int totalRecord;
	
	//总页数
	private int totalPage;
	
	//集合
	private List<?> dataList; 
	
	public PageUtils(int pageNum, int pageSize, List<?> dataList){
		if (dataList.isEmpty()) {
			return;
		}
		if (pageNum < 1) {
			pageNum = 1;
		}
		
		//获取总数
		this.totalRecord = dataList.size();
		//获取页显示多少数据
		this.pageSize = pageSize;
		//获取总页数
		this.totalPage = this.totalRecord / this.pageSize;
		if (this.totalRecord%this.pageSize!=0) {
			this.totalPage+=1;
		}
		
		//当前第几页数据
        this.currentPage = this.totalPage < pageNum ? this.totalPage : pageNum;
        
        //起始索引
        int fromIndex = this.pageSize * (this.currentPage - 1);
        //结束索引
        int toIndex =this.pageSize * this.currentPage > this.totalRecord ?  this.totalRecord :  this.pageSize * this.currentPage;
        //根据起始索引和结束索引获取集合的数据
        this.dataList = dataList.subList(fromIndex, toIndex);
		
	}
	
	
	public PageUtils() {
        super();
    }
	
	public PageUtils(int pageSize, int currentPage, int totalRecord, int totalPage, List<?> dataList) {
        super();
        this.pageSize = pageSize;
        this.currentPage = currentPage;
        this.totalRecord = totalRecord;
        this.totalPage = totalPage;
        this.dataList = dataList;
	}
	
	

	public int getPageSize() {
		return pageSize;
	}

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

	public int getCurrentPage() {
		return currentPage;
	}

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

	public int getTotalRecord() {
		return totalRecord;
	}

	public void setTotalRecord(int totalRecord) {
		this.totalRecord = totalRecord;
	}

	public int getTotalPage() {
		return totalPage;
	}

	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}

	public List<?> getDevList() {
		return dataList;
	}

	public void setDevList(List<?> devList) {
		this.dataList = devList;
	}
	
	
}