目录
- 关于此文
- 配置xml-pager.tld
- 分页控件-Pager
- 分页action集成类-BaseController
- 实例-Dao
- 实例-service
- 实例-action
- 实例-JSP
- 实例-SQL
- 实例图
关于此文
运用第一篇分页的例子，结果以失败告终。在网上又寻找了很多例子。大多是都是这一种。着手开发的项目采用spring MVC框架。符合需求。摘下来，试了一试。
网上的例子总是少一些东西。经过一番折腾。终于搞定了。下面分享出来，供参考。
分页基本逻辑思想懂了，重点是在于怎么实现。怎么实现更好。还需要进一步思考。
配置xml-pager.tld
<?xml version="1.0" encoding="UTF-8" ?> <taglib xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2eehttp://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd" version="2.0"> <description>Pager</description> <tlib-version>1.0</tlib-version> <short-name>page</short-name> <uri></uri> <tag> <name>createPager</name> <tag-class>getui.util.Pager</tag-class> <body-content>JSP</body-content> <attribute> <name>curPage</name> <required>true</required> <rtexprvalue>true</rtexprvalue> <type>java.lang.Integer</type> </attribute> <attribute> <name>totalPage</name> <required>true</required> <rtexprvalue>true</rtexprvalue> <type>java.lang.Integer</type> </attribute> <attribute> <name>pageSize</name> <required>true</required> <rtexprvalue>true</rtexprvalue> <type>java.lang.Integer</type> </attribute> <attribute> <name>totalCount</name> <required>true</required> <rtexprvalue>true</rtexprvalue> <type>java.lang.Integer</type> </attribute> <attribute> <name>formId</name> <required>true</required> <rtexprvalue>true</rtexprvalue> <type>java.lang.String</type> </attribute> </tag> </taglib>
分页控件-Pager
package getui.util; import java.io.IOException; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; /*** * 分页控件 * * @author Anny */ public class Pager extends TagSupport { private Integer curPage; //当前页码 private Integer totalPage; //总页数 private Integer pageSize = 10; //一页显示的记录数 private Integer totalCount = 0; //记录总数 private String formId; //请求的action name private Integer lastIndex; //结束索引 public int doStartTag() throws JspException { StringBuffer buffer=new StringBuffer(); JspWriter out = pageContext.getOut(); int pageNumber = 0; if (totalPage % pageSize == 0) { pageNumber = totalPage / pageSize; } else { pageNumber = (totalPage / pageSize) + 1; } if (curPage < 1) { curPage = 1; } try { if (pageNumber > 0) { buffer.append("<script type='text/javascript'>");//script-Start buffer.append("function go(pageNum)"); buffer.append("{");//{start buffer.append("var f = document.getElementById('" + formId + "');"); buffer.append("f.action = f.action + '?pageNum=' + pageNum + '&pageSize="+pageSize + "';"); buffer.append("f.submit();" ); buffer.append("}");//}end buffer.append("</script>");//script-end out.print(buffer.toString()); out.append("<div class='page-number-strip' style='height:62px;text-align: right;'> ");//page-number-strip out.print("<ul class='pagination'>");//添加Bootstrap分页的样式pagination int start = 1; int end = totalPage; for (int i = 4; i >= 1; i--) { if ((curPage - i) >= 1) { start = curPage - i; break; } } for (int i = 4; i >= 1; i--) { if ((curPage + i) <= totalPage) { end = curPage + i; break; } } // 如果小于9则右侧补齐 if (end - start + 1 <= 9) { Integer padLen = 9 - (end - start + 1); for (int i = padLen; i >= 1; i--) { if ((end + i) <= totalPage) { end = end + i; break; } } } // 如果还小于9左侧补齐 if (end - start + 1 <= 9) { Integer padLen = 9 - (end - start + 1); for (int i = padLen; i >= 1; i--) { if ((start - i) >= 1) { start = start - i; break; } } } if (curPage > 1) { if (start > 1) { out.print("<li><a href='javascript:go(1)'>首页</a></li>"); } out.print("<li><a href='javascript:go(" + (curPage - 1) + ")'>上一页</a></li>"); } for (int i = start; i <= end; i++) { if (i == curPage) { out.print("<li class='active'><a href='javascript:void(0);'>" + i + "</a></li>"); } else { out.print("<li><a href='javascript:go(" + i + ")'>" + i + "</a></li>"); } } if (curPage < totalPage) { out.print("<li><a href='javascript:go(" + (curPage + 1) + ")'>下一页</a></li>"); if (end < totalPage) { out.print("<li><a href='javascript:go(" + totalPage + ")'>尾页</a></li>"); } } out.print("<li><a href='javascript:void(0)'>共" + totalPage + "页" + this.totalCount + "条</a></li>"); out.print("</ul>"); out.print("</div>"); } } catch (IOException e) { e.printStackTrace(); } return super.doStartTag(); } /** * 算开始索引 * * @param pageNum - * @param pageSize * @return */ public static Integer getStartIndex(Integer pageNum, Integer pageSize) { Integer res = 0; if (pageNum > 0) { res = (pageNum - 1) * pageSize; } return res; } /** * 算结束索引 -- 方法暂时未用 * * @param pageSize * @param totalCount * @param totalPage * @param pageNum * @return */ public static Integer getLastIndex(Integer pageSize,Integer totalCount,Integer totalPage,Integer pageNum){ //计算结束时候的索引 Integer lastIndex =0; if( totalCount < pageSize){ lastIndex = totalCount; }else if((totalCount % pageSize == 0) || (totalCount % pageSize != 0 && pageNum < totalPage)){ lastIndex = pageNum * pageSize; }else if(totalCount % pageSize != 0 && pageNum == totalPage){//最后一页 lastIndex = totalCount ; } return lastIndex; } public Integer getLastIndex() { return lastIndex; } public void setLastIndex(Integer lastIndex) { this.lastIndex = lastIndex; } public void setCurPage(Integer curPage) { this.curPage = curPage; } public void setPageSize(Integer pageSize) { this.pageSize = pageSize; } public void setTotalPage(Integer totalPage) { this.totalPage = totalPage; } public void setFormId(String formId) { this.formId = formId; } public Integer getTotalCount() { return totalCount; } public void setTotalCount(Integer totalCount) { this.totalCount = totalCount; } }
分页action集成类-BaseController
package getui.controller; import getui.util.Pager; import java.util.Iterator; import java.util.List; import java.util.Map; import org.springframework.ui.Model; /** * 分页控件初始化父类 * * @author Anny */ public class BaseController { //初始化分页相关信息 protected void initPage(Map<String,Object> map, Integer pageNum, Integer pageSize, Integer totalCount){ if(null==pageSize || pageSize.equals("")){ pageSize = 10; //每页显示条数 } // if(pageSize>50){ // pageSize = 50; // } Integer totalPage = (totalCount+pageSize-1)/pageSize; if(null==pageNum){ pageNum = 1; }else if(pageNum>totalPage){ pageNum = totalPage; } map.put("startIndex", Pager.getStartIndex(pageNum, pageSize)); map.put("pageNum", pageNum); map.put("totalPage", totalPage); map.put("pageSize", pageSize); map.put("totalCount", totalCount); map.put("lastIndex", Pager.getLastIndex(pageSize,totalCount,totalPage,pageNum)); } //将相关数据放入model protected void initResult(Model model, List<Map<String, Object>> list, Map<String,Object> map){ model.addAttribute("list", list); Iterator it = map.entrySet().iterator(); while(it.hasNext()){ Map.Entry m = (Map.Entry)it.next(); model.addAttribute(m.getKey().toString(), m.getValue()); } } }
实例-Dao
package getui.dao; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.log4j.Logger; import org.springframework.dao.DataAccessException; import org.springframework.jdbc.core.ResultSetExtractor; import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource; import org.springframework.jdbc.core.namedparam.SqlParameterSource; import org.springframework.stereotype.Repository; import getui.controller.GeTuiController; import getui.entity.Branch; import getui.entity.GetuiInfo; @Repository("bookDao") public class BookDao extends BaseDao{ /** 日志记录 .*/ private static Logger logger = Logger.getLogger(BookDao.class); public int getListCount(){ String sql ="select count(1) from Book"; return super.jdbcTemplate.queryForInt(sql); } public List getListBook(int pageIndex,int pageSize){ String sql = "select * from Book where 1=1 limit "+pageIndex+","+pageSize; // String sql = "select a.*" // + " from (" // +" select id as nid,name ,price" // +" from book" // +" order by(id) " // +" ) a" // +" where nid between "+pageIndex+" and "+pageSize+""; return super.jdbcTemplate.queryForList(sql); } }
实例-service
package getui.service; import getui.dao.BookDao; import getui.dao.ClientInfoDao; import getui.entity.Branch; import getui.entity.GetuiInfo; import java.util.List; import java.util.Map; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; @Service("bookService") public class BookService { /** 日志记录 .*/ private static Logger logger = Logger.getLogger(BookService.class); @Autowired private BookDao bookDao; public int getListCount(){ return bookDao.getListCount(); } public List getListBook(int pageIndex,int pageSize){ return bookDao.getListBook(pageIndex, pageSize); // return bookDao.getListBook(); } }
实例-action
package getui.controller; import getui.service.BookService; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; @Controller @RequestMapping(value = "/test") public class TestController extends BaseController { /** 日志记录 .*/ private static Logger logger = Logger.getLogger(TestController.class); @Autowired private BookService bookService; @RequestMapping("/test.do") public String test(Model model,String type, @RequestParam(required=false) Integer pageNum, @RequestParam(required=false) Integer pageSize) { Map<String,Object> map = new HashMap<String,Object>(); map.put("type", type); Integer totalCount = bookService.getListCount(); this.initPage(map, pageNum, pageSize, totalCount); List list = this.bookService.getListBook(Integer.valueOf(String.valueOf(map.get("startIndex"))), Integer.valueOf(String.valueOf(map.get("pageSize")))); this.initResult(model, list, map); return "book"; } }
实例-JSP
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="page" uri="/WEB-INF/pager.tld"%> <% String path = request.getContextPath(); %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html> <html> <head> <title>测试分页标签</title> <link href="<%=path%>/css/bootstrap.css" rel="stylesheet"> <link href="<%=path%>/css/bootstrap-responsive.css" rel="stylesheet"> <script type="text/javascript"> function toDel(id){ var url = "<%=path%>/test/del?id=" + id +"&pageNum=${param.pageNum}&pageSize=${param.pageSize}"; window.location.href = url; } </script> </head> <body> <div class="container"> <c:forEach items="${list}" var="item"> <div class="border-bottom1"> <h3><a href="<%=path%>/test/view?id=${item.id}">${item.name}</a></h3> <p> ${item.content} </p> <p class="text-right muted"> 2013-06-22 22:37 <a href="javascript:toDel('${item.id}');">删除</a> <a href="<%=path%>/test/toEdit?id=${item.id}&pageNum=${param.pageNum}&pageSize=${param.pageSize}">编辑</a> </p> </div> </c:forEach> <form method="post" id="testForm" action="<%=path%>/test/test.do"> <input type="hidden" name="type" value="${type}"> </form> <page:createPager pageSize="${pageSize}" totalPage="${totalPage}" totalCount="${totalCount}" curPage="${pageNum}" formId="testForm"/> </div> </body> </html>
实例-SQL
/* Navicat MySQL Data Transfer Source Server : 本地库 Source Server Version : 50621 Source Host : localhost:3306 Source Database : test Target Server Type : MYSQL Target Server Version : 50621 File Encoding : 65001 Date: 2016-01-13 12:37:11 */ SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for `book` -- ---------------------------- DROP TABLE IF EXISTS `book`; CREATE TABLE `book` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(20) DEFAULT NULL, `price` int(11) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=25 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of book -- ---------------------------- INSERT INTO `book` VALUES ('1', '图书1', '10'); INSERT INTO `book` VALUES ('2', '图书2', '11'); INSERT INTO `book` VALUES ('3', '图书3', '12'); INSERT INTO `book` VALUES ('4', '图书4', '13'); INSERT INTO `book` VALUES ('5', '图书5', '14'); INSERT INTO `book` VALUES ('6', '图书6', '15'); INSERT INTO `book` VALUES ('7', '图书7', '16'); INSERT INTO `book` VALUES ('8', '图书8', '17'); INSERT INTO `book` VALUES ('9', '图书9', '18'); INSERT INTO `book` VALUES ('10', '图书10', '19'); INSERT INTO `book` VALUES ('11', '图书11', '11'); INSERT INTO `book` VALUES ('12', '图书12', '23'); INSERT INTO `book` VALUES ('13', '图书13', '22'); INSERT INTO `book` VALUES ('14', '图书14', '22'); INSERT INTO `book` VALUES ('15', '图书15', '22'); INSERT INTO `book` VALUES ('16', '图书16', '9'); INSERT INTO `book` VALUES ('17', '图书17', '10'); INSERT INTO `book` VALUES ('18', '图书18', '2'); INSERT INTO `book` VALUES ('19', '图书19', '8'); INSERT INTO `book` VALUES ('20', '图书20', '78'); INSERT INTO `book` VALUES ('21', '图书21', '21'); INSERT INTO `book` VALUES ('22', '图书22', '22'); INSERT INTO `book` VALUES ('23', '图书23', '23'); INSERT INTO `book` VALUES ('24', '图书24', '24');
实例图
测试示例图
分页融合到自己的代码中示例图
