分页复用代码【Page类、JSP显示页面】

来源：互联网发布：js replace 单引号编辑：程序博客网时间：2024/05/18 00:16

前言

为了复用，记载一些以前写过的工具类、方法

page类

    import java.util.List;    /**     * Created by ozc on 2017/3/1.     */    public class Page {        //保存着分页的数据        private List<Customer> list;        //总记录数        private long totalRecord;        //每页显示记录数，这里我规定每页显示3条        private int linesize = 3;        //总页数        private int totalPageCount;        //当前显示的页数        private int currentPageCount;        //开始取的记录位置        private int startIndex;        //记录JSP页面开始的页数和结束的页数        private int startPage;        private int endPage;        private String url;        public Page() {        }        public Page(int currentPageCount, long totalRecord) {            //将传递进来的currentPageCount初始化            this.currentPageCount = currentPageCount;            //总页数            totalPageCount = (int) (totalRecord % linesize == 0 ? totalRecord / linesize : totalRecord / linesize + 1);            this.totalRecord = totalRecord;            //开始取数据的位置            startIndex = (currentPageCount - 1) * linesize;            //如果当前页小于10，那么开始页为1，结束页为10就行了            if (this.currentPageCount <= 10) {                this.startPage = 1;                this.endPage = 10;            } else {                this.startPage = this.currentPageCount - 4;                this.endPage = this.currentPageCount + 5;                //加减后页数越界的情况                if (startPage < 1) {                    this.startPage = 1;                    this.endPage = 10;                }                if (endPage > totalPageCount) {                    this.startPage = this.currentPageCount - 9;                    this.endPage = this.totalPageCount;                }            }        }        public String getUrl() {            return url;        }        public void setUrl(String url) {            this.url = url;        }        public int getStartIndex() {            return startIndex;        }        public void setCurrentPageCount(int currentPageCount) {            this.currentPageCount = currentPageCount;        }        public void setStartIndex(int startIndex) {            this.startIndex = startIndex;        }        public int getStartPage() {            return startPage;        }        public void setStartPage(int startPage) {            this.startPage = startPage;        }        public int getEndPage() {            return endPage;        }        public void setEndPage(int endPage) {            this.endPage = endPage;        }        public int getTotalPageCount() {            return totalPageCount;        }        public void setTotalPageCount(int totalPageCount) {            this.totalPageCount = totalPageCount;        }        public List<Customer> getList() {            return list;        }        public void setList(List<Customer> list) {            this.list = list;        }        public long getTotalRecord() {            return totalRecord;        }        public void setTotalRecord(long totalRecord) {            this.totalRecord = totalRecord;        }        public int getLinesize() {            return linesize;        }        public void setLinesize(int linesize) {            this.linesize = linesize;        }        public long getCurrentPageCount() {            return currentPageCount;        }        public void setCurrentPageCount(long currentPageCount) {            this.currentPageCount = (int) currentPageCount;        }    }

显示页面JSP

<%--  Created by IntelliJ IDEA.  User: ozc  Date: 2017/3/1  Time: 21:17  To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><%--显示当前页数--%>当前页数是：[${page.currentPageCount}]&nbsp;&nbsp;&nbsp;<%--如果当前的页码大于1，才显示上一步--%><c:if test="${page.currentPageCount>1}">    <%--把传递过去的页码-1就行了--%>    <a href="${page.url}?currentPageCount=${page.currentPageCount-1}">        上一步    </a></c:if><%--提供页数的界面--%><c:forEach var="pageNum" begin="${page.startPage}" end="${page.endPage}">    <a href="${page.url}?currentPageCount=${pageNum}">        [${pageNum}]&nbsp;    </a></c:forEach><%--如果当前的页码小于总页数，才显示下一步--%><c:if test="${page.currentPageCount<page.totalPageCount}">    <%--把传递过去的页码-1就行了--%>    <a href="${page.url}?currentPageCount=${page.currentPageCount+1}">        下一步    </a>&nbsp;&nbsp;</c:if><input type="text" id="currentPageCount"><input type="button" value="跳转" onclick="goPage()">总页数是：${page.totalPageCount}&nbsp;&nbsp;总记录数是：${page.totalRecord}<script type="text/javascript">    /*既然写上了JavaScript代码了，就顺便验证输入框输入的数据是否合法吧*/    function goPage() {        /*获取输入框控件*/        var input = document.getElementById("currentPageCount");        /*获取输入框的数据*/        var value = input.value;        if(value==null || value==""){            alert("请输入页码");            return false;        }        if(!value.match("\\d+")){            alert("请输入数字");            return false;        }        if(value<1 || value>${page.totalPageCount}){            alert("请输入合法数据");            return false ;        }        window.location.href="${page.url}?currentPageCount="+value;    }</script>

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