不错的Page类

package com.sanqing.util;
public class Page {
    private int everyPage;            //每页显示记录数
    private int totalCount;            //总记录数
    private int totalPage;            //总页数
    private int currentPage;        //当前页
    private int beginIndex;            //查询起始点
    private boolean hasPrePage;        //是否有上一页
    private boolean hasNextPage;    //是否有下一页
    public Page(int everyPage, int totalCount, int totalPage, int currentPage,
            int beginIndex, boolean hasPrePage, boolean hasNextPage) {
        super();
        this.everyPage = everyPage;
        this.totalCount = totalCount;
        this.totalPage = totalPage;
        this.currentPage = currentPage;
        this.beginIndex = beginIndex;
        this.hasPrePage = hasPrePage;
        this.hasNextPage = hasNextPage;
    }
    public Page(){}
    /**
     * @return the everyPage
     */
    public int getEveryPage() {
        return everyPage;
    }
    /**
     * @param everyPage the everyPage to set
     */
    public void setEveryPage(int everyPage) {
        this.everyPage = everyPage;
    }
    /**
     * @return the totalCount
     */
    public int getTotalCount() {
        return totalCount;
    }
    /**
     * @param totalCount the totalCount to set
     */
    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }
    /**
     * @return the totalPage
     */
    public int getTotalPage() {
        return totalPage;
    }
    /**
     * @param totalPage the totalPage to set
     */
    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }
    /**
     * @return the currentPage
     */
    public int getCurrentPage() {
        return currentPage;
    }
    /**
     * @param currentPage the currentPage to set
     */
    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }
    /**
     * @return the beginIndex
     */
    public int getBeginIndex() {
        return beginIndex;
    }
    /**
     * @param beginIndex the beginIndex to set
     */
    public void setBeginIndex(int beginIndex) {
        this.beginIndex = beginIndex;
    }
    /**
     * @return the hasPrePage
     */
    public boolean isHasPrePage() {
        return hasPrePage;
    }
    /**
     * @param hasPrePage the hasPrePage to set
     */
    public void setHasPrePage(boolean hasPrePage) {
        this.hasPrePage = hasPrePage;
    }
    /**
     * @return the hasNextPage
     */
    public boolean isHasNextPage() {
        return hasNextPage;
    }
    /**
     * @param hasNextPage the hasNextPage to set
     */
    public void setHasNextPage(boolean hasNextPage) {
        this.hasNextPage = hasNextPage;
    }
    
    
}

首先定出Page类的属性,

package com.sanqing.util;
/*
 * 分页信息辅助类
 */
public class PageUtil {
    public static Page createPage(int everyPage,int totalCount,int currentPage) {//创建分页信息对象
        everyPage = getEveryPage(everyPage);
        currentPage = getCurrentPage(currentPage);
        int totalPage = getTotalPage(everyPage, totalCount);
        int beginIndex = getBeginIndex(everyPage, currentPage);
        boolean hasPrePage = getHasPrePage(currentPage);
        boolean hasNextPage = getHasNextPage(totalPage, currentPage);
        return new Page(everyPage, totalCount, totalPage, currentPage,
                beginIndex, hasPrePage,  hasNextPage);
    }
    public static int getEveryPage(int everyPage) {        //获得每页显示记录数
        return everyPage == 0 ? 10 : everyPage;
    }
    public static int getCurrentPage(int currentPage) {    //获得当前页
        return currentPage == 0 ? 1 : currentPage;
    }
    public static int getTotalPage(int everyPage,int totalCount) {//获得总页数
        int totalPage = 0;
        if(totalCount != 0 &&totalCount % everyPage == 0) {
            totalPage = totalCount / everyPage;
        } else {
            totalPage = totalCount / everyPage + 1;
        }
        return totalPage;
    }
    public static int getBeginIndex(int everyPage,int currentPage) {//获得起始位置
        return (currentPage - 1) * everyPage;
    }
    public static boolean getHasPrePage(int currentPage) {//获得是否有上一页
        return currentPage == 1 ? false : true;
    }
    public static boolean getHasNextPage(int totalPage, int currentPage) {    //获得是否有下一页
        return currentPage == totalPage || totalPage == 0 ? false : true;
    }
}

然后用一个静态方法生成实例

posted on 2017-04-20 21:18  且歌且行吧  阅读(106)  评论(0编辑  收藏  举报

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