Bootstrap和Java分页实例第二篇

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　　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

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