Java——分页

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/** * 分页 * This class is used for ...    * @author Bdong   * @version    *       1.0, 2016年5月21日 上午11:42:02 */public class Pagination<T> {    //总数据条数    private int total;    //总页数    private int pageCount;    //每页数据条数    private int pageSize;    //当前页数    private int pageIndex;    //数据集    private List<T> rows;    //当前页数据起始位置    private int start;    //当前页数据结束位置    private int end;    //分页开关    private boolean flag;    public void init(){        if(pageSize!=0){            //总页数=总数据条数/总页数            int pageCountTemp=(int)total/pageSize;            if(total>=pageSize){                this.pageCount=total%pageSize==0?pageCountTemp:pageCountTemp+1;            }else{                this.pageCount=1;            }            //判断页数和当前页数            if(pageIndex>pageCount){                pageIndex=pageCount;            }            //如果每页数据条数小于1，则修正为1            if(pageSize<1){                pageSize=1;            }            //如果设置的每页数据条数大于真实数据条数，则修正为真实数据条数            if(pageSize>rows.size()){                pageSize=rows.size();            }            //根据当前页计算起始和结束条目            this.start=(pageIndex-1)*pageSize+1;            this.end=this.start+this.pageSize-1;            //结束数据下标大于数据总数，则修正            if(this.end>rows.size()){                this.end=rows.size();            }            if(this.flag){                this.rows=rows.subList(start-1, end);            }        }    }    /**     * 构造方法，     * @param pageIndex     * @param totalCount     * @param pageCount     */    public Pagination(int pageIndex, int total, int pageSize,boolean flag) {        super();        this.pageIndex = pageIndex;        this.total = total;        this.pageSize = pageSize;        this.flag = flag;    }    /**     * 构造方法     * @param pageIndex     * @param totalCount     * @param pageCount     * @param dataList     */    public Pagination(int pageIndex, int total, int pageSize, List<T> rows,boolean flag) {        super();        this.pageIndex = pageIndex;        this.total = total;        this.pageSize = pageSize;        this.rows = rows;        this.flag = flag;    }    /**     * 无参构造     */    public Pagination() {        super();        // TODO Auto-generated constructor stub    }    /**     * 重写toString,打印Json字符串     */    @Override    public String toString() {        return "\"total\":" + total + ", \"end\":" + end + ", \"rows\":" + rows                + ", \"pageCount\":" + pageCount + ", \"pageIndex\":" + pageIndex                + ", \"pageSize\":" + pageSize + ", \"start\":" + start;    }    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 getPageIndex() {        return pageIndex;    }    public void setPageIndex(int pageIndex) {        this.pageIndex = pageIndex;    }    public int getStart() {        return start;    }    public void setStart(int start) {        this.start = start;    }    public int getEnd() {        return end;    }    public void setEnd(int end) {        this.end = end;    }    public int getTotal() {        return total;    }    public void setTotal(int total) {        this.total = total;    }    public List<T> getRows() {        return rows;    }    public void setRows(List<T> rows) {        this.rows = rows;    }}
使用实例
·int pageIndex 当前页数
·int total 总数据条数
·int pageSize 每页数据条数
·List rows 数据集
·boolean flag 分页开关
Pagination<Object> pagination=new Pagination<Object>(pageIndex,total,pageCount,list,true).init();
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