本文实例为大家分享了新闻列表分页查询的java代码,供大家参考,具体内容如下
- package com.ibeifeng.test;
- //创建新闻测试类
- public class newTest {
- private long id;
- private String title;
- private String content;
- private String author;
- public newTest() {
- super();
- }
- public newTest(long id, String title, String content, String author) {
- this.id = id;
- this.title = title;
- this.content = content;
- this.author = author;
- }
- public long getId() {
- return id;
- }
- public void setId(long id) {
- this.id = id;
- }
- public String getTitle() {
- return title;
- }
- public void setTitle(String title) {
- this.title = title;
- }
- public String getContent() {
- return content;
- }
- public void setContent(String content) {
- this.content = content;
- }
- public String getAuthor() {
- return author;
- }
- public void setAuthor(String author) {
- this.author = author;
- }
- @Override
- public String toString() {
- return "newTest [id=" + id + ", title=" + title + ", content=" + content
- + ", author=" + author + "]";
- }
- }
- 2.开始查询
- <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
- <%@ page import="com.ibeifeng.test.newTest"%>
- <%
- String path = request.getContextPath();
- String basePath = request.getScheme() + "://"
- + request.getServerName() + ":" + request.getServerPort()
- + path + "/";
- %>
- <%
- List<newTest> list = new ArrayList<newTest>(107);//设定新闻行数为107行
- for (int i = 1; i <= 107; i++) {//list中添加新闻
- newTest news = new newTest(0L + i, i + "里约奥运", "马龙获得金牌-世界乒坛第五位男子“大满贯”得主", "福音");
- list.add(news);
- }//end of for...添加107条数据到集合中
- //int pageIndex=10;
- int iTitleIndex = list.size();//获取集合下表标
- int iTitlePages = iTitleIndex / 10
- + (iTitleIndex % 10 == 0 ? 0 : 1);//获取页数的总数
- int ipage = 4;//开始的页数
- String str = request.getParameter("page");
- if (str != null && !str.trim().equals("")) {
- int newPage = Integer.valueOf(str);
- if (newPage < 1) {
- ipage = 1;
- } else if (newPage > iTitlePages) {
- ipage = iTitlePages;
- } else {
- ipage = newPage;
- }
- }
- //创建一个新的集合(大小每个页面显示的新闻总数) 将107条数据分别存储到其中
- List<newTest> listPage = new ArrayList<newTest>(10);
- int ipa = 10;//获取循环体的循环次数//最后一页只有七条数据
- if (ipage == iTitlePages) { //当当前页数为最后一页时,剩余几行则循环体之执行剩余的行的数次,
- ipa = list.size() - (iTitlePages - 1) * 10;
- }
- for (int i = 0; i < ipa; i++) { //i=0;获取前十个数据 第一次循环时ipage=4
- newTest arr = list.get(i + (ipage - 1) * 10);
- listPage.add(arr);
- }
- %>
- <html>
- <body>
- <table>
- <tr>
- <th>标题</th>
- <td>作者</td>
- <td>摘要</td>
- </tr>
- <%
- for (int i = 0; i < listPage.size(); i++) { //java代码需要用<% %》保护起来否则会被当做web语句执行
- newTest temp = listPage.get(i);
- %>
- <tr>
- <td><%=temp.getTitle()%></td>
- <td><%=temp.getAuthor()%></td>
- <td><%=temp.getContent()%></td>
- </tr>
- <%
- }//end of for...
- %>
- </table>
- <%
- boolean bFirst = ipage == 1;
- boolean bLast = ipage == iTitlePages ;
- %>
- <%
- if (!bFirst) {
- %>
- <a href="test.jsp?page=<%=ipage - 1%>&totopage=11">上一页</a>
- <%
- }
- %>
-
- <!-- 当跳转到第一页时不再显示“上一页”提交对话框,下同 -->
- <%
- if (!bLast) {
- %>
- <a href="test.jsp?page=<%=ipage + 1%>&totopage=11">下一页</a>
- <%
- }
- %>第<%=ipage%>页 共<%=iTitlePages%>页
- </body>
- </html>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。