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簡單的分頁封裝(一)

分頁對象接口:

public interface Paginable {
	/**
	 * 總記錄數
	 * 
	 * @return
	 */
	public int getTotalCount();

	/**
	 * 總頁數
	 * 
	 * @return
	 */
	public int getTotalPage();

	/**
	 * 每頁記錄數
	 * 
	 * @return
	 */
	public int getPageSize();

	/**
	 * 目前頁号
	 * 
	 * @return
	 */
	public int getPageNo();

	/**
	 * 是否第一頁
	 * 
	 * @return
	 */
	public boolean isFirstPage();

	/**
	 * 是否最後一頁
	 * 
	 * @return
	 */
	public boolean isLastPage();

	/**
	 * 傳回下頁的頁号
	 */
	public int getNextPage();

	/**
	 * 傳回上頁的頁号
	 */
	public int getPrePage();

}
           

簡單的分頁對象:

public class SimplePage implements Serializable,Paginable{

	private static final long serialVersionUID = 1L;
	public static final int DEF_COUNT = 20;

	/**
	 * 檢查頁碼 checkPageNo
	 * 
	 * @param pageNo
	 * @return if pageNo==null or pageNo<1 then return 1 else return pageNo
	 */
	public static int cpn(Integer pageNo) {
		return (pageNo == null || pageNo < 1) ? 1 : pageNo;
	}

	public SimplePage() {
	}

	/**
	 * 構造器
	 * 
	 * @param pageNo
	 *            頁碼
	 * @param pageSize
	 *            每頁幾條資料
	 * @param totalCount
	 *            總共幾條資料
	 */
	public SimplePage(int pageNo, int pageSize, int totalCount) {
		setTotalCount(totalCount);
		setPageSize(pageSize);
		setPageNo(pageNo);
		adjustPageNo();
		
	}

	/**
	 * 調整頁碼,使不超過最大頁數
	 */
	public void adjustPageNo() {
		if (pageNo == 1) {
			return;
		}
		int tp = getTotalPage();
		if (pageNo > tp) {
			pageNo = tp;
		}
	}

	/**
	 * 獲得頁碼
	 */
	public int getPageNo() {
		return pageNo;
	}

	/**
	 * 每頁幾條資料
	 */
	public int getPageSize() {
		return pageSize;
	}

	/**
	 * 總共幾條資料
	 */
	public int getTotalCount() {
		return totalCount;
	}

	/**
	 * 總共幾頁
	 */
	public int getTotalPage() {
		int totalPage = totalCount / pageSize;
		if (totalPage == 0 || totalCount % pageSize != 0) {
			totalPage++;
		}
		return totalPage;
	}

	/**
	 * 是否第一頁
	 */
	public boolean isFirstPage() {
		return pageNo <= 1;
	}

	/**
	 * 是否最後一頁
	 */
	public boolean isLastPage() {
		return pageNo >= getTotalPage();
	}

	/**
	 * 下一頁頁碼
	 */
	public int getNextPage() {
		if (isLastPage()) {
			return pageNo;
		} else {
			return pageNo + 1;
		}
	}

	/**
	 * 上一頁頁碼
	 */
	public int getPrePage() {
		if (isFirstPage()) {
			return pageNo;
		} else {
			return pageNo - 1;
		}
	}

	protected int totalCount = 0;
	protected int pageSize = 20;
	protected int pageNo = 1;

	/**
	 * if totalCount<0 then totalCount=0
	 * 
	 * @param totalCount
	 */
	public void setTotalCount(int totalCount) {
		if (totalCount < 0) {
			this.totalCount = 0;
		} else {
			this.totalCount = totalCount;
		}
	}

	/**
	 * if pageSize< 1 then pageSize=DEF_COUNT
	 * 
	 * @param pageSize
	 */
	public void setPageSize(int pageSize) {
		if (pageSize < 1) {
			this.pageSize = DEF_COUNT;
		} else {
			this.pageSize = pageSize;
		}
	}

	/**
	 * if pageNo < 1 then pageNo=1
	 * 
	 * @param pageNo
	 */
	public void setPageNo(int pageNo) {
		if (pageNo < 1) {
			this.pageNo = 1;
		} else {
			this.pageNo = pageNo;
		}
	}

}
           

分頁對象:

public class Pagination extends SimplePage{

	private static final long serialVersionUID = 1L;

	public Pagination() {
	}

	/**
	 * 構造器
	 * 
	 * @param pageNo
	 *            頁碼
	 * @param pageSize
	 *            每頁幾條資料
	 * @param totalCount
	 *            總共幾條資料
	 */
	public Pagination(int pageNo, int pageSize, int totalCount) {
		super(pageNo, pageSize, totalCount);
		
	}

	/**
	 * 構造器
	 * 
	 * @param pageNo
	 *            頁碼
	 * @param pageSize
	 *            每頁幾條資料
	 * @param totalCount
	 *            總共幾條資料
	 * @param list
	 *            分頁内容
	 */
	public Pagination(int pageNo, int pageSize, int totalCount, List<?> list) {
		super(pageNo, pageSize, totalCount);
		this.list = list;
	}

	/**
	 * 第一條資料位置
	 * 
	 * @return
	 */
	public int getFirstResult() {
		return (pageNo - 1) * pageSize;
	}

	/**
	 * 目前頁的資料
	 */
	private List<?> list;
	
	/**
	 * 目前頁的分頁樣式
	 */
	private List<String> pageView;

	/**
	 * 獲得分頁内容
	 * 
	 * @return
	 */
	public List<?> getList() {
		return list;
	}

	/**
	 * 設定分頁内容
	 * 
	 * @param list
	 */

	public void setList(@SuppressWarnings("rawtypes") List list) {
		this.list = list;
	}
	/**
	 * 獲得分頁樣式
	 * 
	 * @return
	 */
	public List<String> getPageView() {
		return pageView;
	}
	/**
	 * 設定分頁樣式
	 * 
	 * @param list
	 */
	public void setPageView(List<String> pageView) {
		this.pageView = pageView;
	}


	/**
	 * 分頁顯示樣示部分
	 */
	public void pageView(String url,String params){
		
	 	pageView = new ArrayList<String>();
	 		
        if(this.pageNo != 1){
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo=1'\"><font size=2>首頁</font></a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.pageNo-1)+"'\"><font size=2>上一頁</font></a>");
        }else{
        	pageView.add("<font size=2>首頁</font>");
        	pageView.add("<font size=2>上一頁</font>");
        }
    
        if(this.getTotalPage() <= 10){
            for (int i = 0; i < this.getTotalPage(); i++) {
                if((i+1)==this.pageNo){
                    pageView.add("<strong>"+this.pageNo+"</strong>");
                    i = i+1;
                    if(this.pageNo==this.getTotalPage())break;
                }
                pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(i+1)+"'\">"+(i+1)+"</a>");
            }
        }else if(this.getTotalPage() <= 20){
            //沒有把...加上
            int l = 0;
            int r = 0;
            if(this.pageNo<5){
                l=this.pageNo-1;
                r=10-l-1;
            }else if(this.getTotalPage()-this.pageNo<5){
                r=this.getTotalPage()-this.pageNo;
                l=10-1-r;
            }else{
                l=4;
                r=5;
            }
            int tmp =  this.pageNo-l;
            for (int i = tmp; i < tmp+10; i++) {
                if(i==this.pageNo){
                    pageView.add("<strong>"+this.pageNo+"</strong>");
                    i = i+1;
                    if(this.pageNo==this.getTotalPage()) break;
                }
                pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(i)+"'\">"+(i)+"</a>");
            }
                
        }else if(this.pageNo<7){
            for (int i = 0; i < 8; i++) {
                if(i+1==this.pageNo){
                    pageView.add("<strong>"+this.pageNo+"</strong>");
                    i = i+1;
                }
                pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(i+1)+"'\">"+(i+1)+"</a>");
            }
            pageView.add("...");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.getTotalPage()-1)+"'\">"+(this.getTotalPage()-1)+"</a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.getTotalPage())+"'\">"+(this.getTotalPage())+"</a>");
        }else if(this.pageNo>this.getTotalPage()-6){
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(1)+"'\">"+(1)+"</a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(2)+"'\">"+(2)+"</a>");
            pageView.add("...");
            for (int i = this.getTotalPage()-8; i <this.getTotalPage() ; i++) {
                if(i+1==this.pageNo){
                    pageView.add("<strong>"+this.pageNo+"</strong>");
                    i = i+1;
                    if(this.pageNo==this.getTotalPage()) break;
                }
                pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(i+1)+"'\">"+(i+1)+"</a>");
            }
        }else{
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(1)+"'\">"+(1)+"</a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(2)+"'\">"+(2)+"</a>");
            pageView.add("...");
            
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.pageNo-2)+"'\">"+(this.pageNo-2)+"</a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.pageNo-1)+"'\">"+(this.pageNo-1)+"</a>");
            pageView.add("<strong>"+this.pageNo+"</strong>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.pageNo+1)+"'\">"+(this.pageNo+1)+"</a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.pageNo+2)+"'\">"+(this.pageNo+2)+"</a>");
            
            pageView.add("...");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.getTotalPage()-1)+"'\">"+(this.getTotalPage()-1)+"</a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.getTotalPage())+"'\">"+(this.getTotalPage())+"</a>");
        }    
        if(this.pageNo != this.getTotalPage()){
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+(this.pageNo+1)+"'\"><font size=2>下一頁</font></a>");
            pageView.add("<a href=\"javascript:void(0);\" οnclick=\"javascript:window.location.href='" + url + "?" + params + "&pageNo="+this.getTotalPage()+"'\"><font size=2>尾頁</font></a>");
        } else{
        	pageView.add("<font size=2>下一頁</font>");
        	pageView.add("<font size=2>尾頁</font>");
        }
        pageView.add("共<var>" + getTotalPage() + "</var>頁 到第<input type='text' id='PAGENO'  size='3' />頁 <input type='button' id='skip' class='hand btn60x20' value='确定' οnclick=\"javascript:window.location.href = '" + url + "?" + params + "&pageNo=' + $('#PAGENO').val() \"/>");
	}
}