jsp实现分页功能

数据分页，在开发中必不可少，由于数据量太大，不得不进行处理。但是对于分页，又有很多种方式，比如使用sql语句的limit，或者使用jquery的插件。但是底层的逻辑，都是需要的。
在这里贴出javabean对象的代码，以及一个辅助类。我做的这个项目是一个个人博客，算是个人网站吧。

(只贴部分底层逻辑代码)

Page.java

package cn.edu.ldu.util;public class Page {    private int everyPage;          //每页显示的数量    private int totalPage;          //总页数    private int totalCount;         //总数量    private int currentPage;        //当前页    private int beginIndex;         //起始页    private boolean hasPrepage;     //是否有上一页    private boolean hasNextPage;    //是否有下一页    public Page() {    }    public Page(int everyPage, int totalPage, int totalCount, int currentPage,int beginIndex, boolean hasPrepage, boolean hasNextPage)    {        this.everyPage = everyPage;        this.totalPage = totalPage;        this.totalCount = totalCount;        this.currentPage = currentPage;        this.beginIndex = beginIndex;        this.hasPrepage = hasPrepage;        this.hasNextPage = hasNextPage;    }    public int getEveryPage() {        return everyPage;    }    public void setEveryPage(int everyPage) {        this.everyPage = everyPage;    }    public int getTotalPage() {        return totalPage;    }    public void setTotalPage(int totalPage) {        this.totalPage = totalPage;    }    public int getTotalCount() {        return totalCount;    }    public void setTotalCount(int totalCount) {        this.totalCount = totalCount;    }    public int getCurrentPage() {        return currentPage;    }    public void setCurrentPage(int currentPage) {        this.currentPage = currentPage;    }    public int getBeginIndex() {        return beginIndex;    }    public void setBeginIndex(int beginIndex) {        this.beginIndex = beginIndex;    }    public boolean isHasPrepage() {        return hasPrepage;    }    public void setHasPrepage(boolean hasPrepage) {        this.hasPrepage = hasPrepage;    }    public boolean isHasNextPage() {        return hasNextPage;    }    public void setHasNextPage(boolean hasNextPage) {        this.hasNextPage = hasNextPage;    }}

PageUtil.java

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

每次我只需要去调用即可。

//传入每页显示的页数，总记录数，当前页Page page=PageUtil.createPage(5, diaryDao.findAllCount(), currentPage);