Spring Data Jpa+SpringMVC+Jquery.pagination.js 实现分页

本博客介绍基于 Spring Data 这款 orm 框架加上 Jquery.pagination 插件实现的分页功能。

本博客是基于一款正在开发中的 github 开源项目的，项目代码地址： https://github.com/u014427391/jeeplatform 欢迎 star(收藏)或者可以下载去学习，还在开发...

介绍一下 Spring Data 框架 spring Data : Spring 的一个子项目。用于简化数据库访问，支持 NoSQL 和 关系数据存储。 下面给出 SpringData 项目所支持 NoSQL 存储：

• MongoDB （文档数据库）
• Neo4j （图形数据库）
• Redis （键 /值存储）
• Hbase （列族数据库）

SpringData 项目所支持的关系数据存储技术：

• JDBC
• JPA

JPA Spring Data : 致力于减少数据访问层 (DAO) 的开发量。开发者只要写好持久层接口就好，然后其它的框架会帮程序员实现。

开发步骤： [ Spring Data 实现数据获取] 本项目是采用 maven 的，所以可以参考一下项目的 maven 配置：

设计好数据库，编写一个实体类：

package org.muses.jeeplatform.model.entity;

import java.util.Date;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

/**
 * 用户信息的实体类
 * @author Nicky
 */
@Entity
@Table(name="sys_user")
public class User {

	/** 用户 Id**/
	private int id;
	
	/** 用户名**/
	private String username;
	
	/** 用户密码**/
	private String password;
	
	/** 手机号**/
	private int phone;
	
	/** 性别**/
	private String sex;
	
	/** 邮件**/
	private String email;
	
	/** 备注**/
	private String mark;
	
	/** 用户级别**/
	private String rank;
	
	/** 最后一次时间**/
	private Date lastLogin;
	
	/** 登录 ip**/
	private String loginIp;
	
	/** 图片路径**/
	private String imageUrl;
	
	/** 注册时间**/
	private Date regTime;
	
	/** 账号是否被锁定**/
	private Boolean locked = Boolean.FALSE;
	
	private Set<Role> roles;		
	
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	@Id
	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	@Column(unique=true,length=100,nullable=false)
	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	@Column(length=100,nullable=false)
	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public int getPhone() {
		return phone;
	}

	public void setPhone(int phone) {
		this.phone = phone;
	}

	@Column(length=6)
	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	@Column(length=100)
	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	@Column(length=30)
	public String getMark() {
		return mark;
	}

	public void setMark(String mark) {
		this.mark = mark;
	}

	@Column(length=10)
	public String getRank() {
		return rank;
	}

	public void setRank(String rank) {
		this.rank = rank;
	}

	@Temporal(TemporalType.DATE)
	public Date getLastLogin() {
		return lastLogin;
	}

	public void setLastLogin(Date lastLogin) {
		this.lastLogin = lastLogin;
	}

	@Column(length=100)
	public String getLoginIp() {
		return loginIp;
	}

	public void setLoginIp(String loginIp) {
		this.loginIp = loginIp;
	}

	@Column(length=100)
	public String getImageUrl() {
		return imageUrl;
	}

	public void setImageUrl(String imageUrl) {
		this.imageUrl = imageUrl;
	}

	@Temporal(TemporalType.DATE)
	@Column(nullable=false)
	public Date getRegTime() {
		return regTime;
	}

	public void setRegTime(Date regTime) {
		this.regTime = regTime;
	}

	 public Boolean getLocked() {
		return locked;
	}

	public void setLocked(Boolean locked) {
		this.locked = locked;
	}
	
}

编写接口实现 Spring Data 框架的 PagingAndSortingRepository 接口

package org.muses.jeeplatform.repository;

import org.muses.jeeplatform.model.entity.User;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.PagingAndSortingRepository;
import org.springframework.data.repository.query.Param;

import java.util.Date;

public interface UserRepository extends PagingAndSortingRepository<User, Integer> {

	/*User findByUsername(String username);

	@Query("from User u where u.username=:username and u.password=:password")
	User findByUsernameAndPassword(@Param("username") String username, @Param("password") String password);

	@Query("from User u where u.id=:id")
	User findById(@Param("id") int id);

	@Query("from User u where date_format(u.lastLogin,'yyyy-MM-dd') between date_format((:startDate),'yyyy-MM-dd') and date_format((:endDate),'yyyy-MM-dd')")
	Page<User> searchU(@Param("startDate")Date startDate,@Param("endDate")Date endDate, Pageable pageable);
*/
}

业务类实现：

package org.muses.jeeplatform.service;

import java.util.*;

import org.muses.jeeplatform.model.entity.User;
import org.muses.jeeplatform.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;

/**
 * @description 用户信息管理的业务类
 * @author Nicky 
 * @date 2017 年 3 月 6 日
 */
@Service
public class UserService {

	@Autowired
    UserRepository userRepository;
	
	/**
	 * 构建 PageRequest 对象
	 * @param num
	 * @param size
	 * @param asc
	 * @param string
	 * @return
	 */
	private PageRequest buildPageRequest(int num, int size, Sort.Direction asc,
										 String string) {
		return new PageRequest(num-1, size,null,string);
	}

	/**
	 * 获取所有的菜单信息并分页显示
	 * @param pageNo
	 * 			当前页面数
	 * @param pageSize
	 * 			每一页面的页数
	 * @return
	 */
	@Transactional
	public Page<User> findAll(int pageNo, int pageSize, Sort.Direction dir, String str){
		PageRequest request = buildPageRequest(pageNo, pageSize, dir, str);
		Page<User> users = userRepository.findAll(request);
		return users;
	}
}

控制类，采用 SpringMVC 框架，先编写一个 baseController，实现一些通用功能的封装：

package org.muses.jeeplatform.web.controller;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.ModelAndView;

public class BaseController {

	Logger log = null;

	/**
	 * 获取日志对象
	 * @return
	 */
	public Logger getInstance(){
		if(log == null){
			log = LoggerFactory.getLogger(BaseController.class);
		}
		return log;
	}

	/**
	 * 得到 request 对象
	 */
	public HttpServletRequest getRequest() {
		HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
		return request;
	}
	
	/**
	 * 得到 ModelAndView
	 */
	public ModelAndView getModelAndView(){
		return new ModelAndView();
	}

}

控制类实现：

package org.muses.jeeplatform.web.controller;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;
import org.apache.commons.collections.map.HashedMap;
import org.muses.jeeplatform.core.Constants;
import org.muses.jeeplatform.core.ExcelViewWrite;
import org.muses.jeeplatform.core.JavaEmailSender;
import org.muses.jeeplatform.model.entity.User;
import org.muses.jeeplatform.service.UserService;
import org.muses.jeeplatform.utils.DateJsonValueProcessor;
import org.muses.jeeplatform.utils.DateUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.util.*;


/**
 * Created by Nicky on 2017/7/29.
 */
@RequestMapping("/user")
@Controller
public class UserController extends BaseController{

    @Autowired
    UserService userService;

    /**
     * 查询所有管理员信息并分页显示
     * @param request
     * @param response
     * @param model
     * @return
     */
    @RequestMapping(value = "/queryAll",produces = "application/json;charset=UTF-8")
    @ResponseBody
    public ModelAndView findAll(HttpServletRequest request, HttpServletResponse response, Model model){
        //当前页
        String pageIndexStr = request.getParameter("pageIndex");

        //每一页的页数
        int pageSize = Constants.PAGE_SIZE;
        ModelAndView mv = this.getModelAndView();
        Page<User> userPage;

        if(pageIndexStr==null||"".equals(pageIndexStr)){
            pageIndexStr = "0";
        }

        int pageIndex = Integer.parseInt(pageIndexStr);

        userPage = userService.findAll(pageIndex+1, pageSize, Sort.Direction.ASC,"id");
        mv.addObject("totalCount",userPage.getTotalElements());
        mv.addObject("pageIndex",pageIndex);
//        JsonConfig cfg = new JsonConfig();
//        cfg.setExcludes(new String[]{"handler","hibernateLazyInitializer"});
        JsonConfig jcg = new JsonConfig();
        jcg.registerJsonValueProcessor(Date.class,
                new DateJsonValueProcessor("yyyy-mm-dd"));
        JSONArray jsonArray = JSONArray.fromObject(userPage.getContent(),jcg);
        //System.out.println(jsonArray.toString());
        mv.addObject("users",jsonArray.toString());
        mv.setViewName("admin/user/sys_user_list");
        return mv;
    }

   
}

[前端页面实现] 页面 View 实现，引用 jquery.pagination.js （分页 js ），跟 pagination.css （分页样式 css ）。 可以去这里下载 http://www.cnblogs.com/knowledgesea/archive/2013/01/03/2841554.html

<%@ page contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <base href="<%=basePath %>">
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>Insert title here</title>
    <!-- bootstrap 样式-->
    <link type="text/css" rel="stylesheet"
          href="<%=basePath%>plugins/page/css/bootstrap-3.3.5.min.css" />
    <!-- jquery.pagination 所需 CSS -->
    <link type="text/css" rel="stylesheet" href="<%=basePath%>plugins/page/css/pagination.css" />
    <script type="text/javascript" src="<%=basePath%>plugins/page/js/jquery.min.js"></script>
    <!-- jquery.pagination 所需 JS 注意必须放在 jquery.js 后面 -->
    <script type="text/javascript" src="<%=basePath%>plugins/page/js/jquery.pagination.js"></script>
    <script type="text/javascript">

        /** 分页操作，使用 jquery.pagination 插件 add by nicky 20170729 start **/
        //当前页
        var pageIndex = Number(${pageIndex});

        //数据量
        var totalCount = Number(${totalCount});

        $(document).ready(function () {
            //加入分页的绑定
            $("#Pagination").pagination(totalCount, {
                callback : pageselectCallback,
                prev_text : '< 上一页',
                next_text: '下一页 >',
                items_per_page : 6,
                num_display_entries : 6,
                current_page : pageIndex,
                num_edge_entries : 1,
                link_to: "user/queryAll?pageIndex=__id__"  //分页的 js 中会自动把"__id__"替换为当前的数。0
            });

            var html = "";
            var data = ${users};
            $.each(data,function(idx,obj){
                var id = obj.id;
                var username = obj.username;
                var mark = obj.mark;
                var phone = obj.phone;
                var email = obj.email;
                var lastLogin = obj.lastLogin;
                var loginIp = obj.loginIp;

                html += "<tr><td><input type='checkbox' name='id' id='id' value=" + id + " /></td>" +
                    "<td>"+id+"</td>"+
                    "<td>"+username+"</td>"+
                    "<td>"+mark+"</td>"+
                    "<td>"+phone+"</td>"+
                    "<td>"+email+"</td>"+
                    "<td>"+lastLogin+"</td>"+
                    "<td>"+loginIp+"</td>"+
                    "<td><a href='javascript:openEditDialog("+id+");' class='bounceIn'>配置角色</a>"+
                    "</tr>";
            });
            $("#content").append(html);


        });

        //这个事件是在翻页时候用的
        function pageselectCallback(index, jq) {

        }
        /** 分页操作，使用 jquery.pagination 插件 add by nicky 20170729 end **/

        //checkbox 的全选 /反选
        var isCheckAll = false;
        function doCheck(){
            if(isCheckAll){
                $("input[type='checkbox']").each(function(){
                    this.checked = false;
                });
                isCheckAll = false;
            }else{
                $("input[type='checkbox']").each(function(){
                    this.checked = true;
                });
                isCheckAll = true;
            }
        }

        

    </script>
</head>
<body>
<br>
<div class="container-fluid">
    <div class="row">
        <div class="col-xs-12 col-md-12">
            <div class="panel panel-default">
                <div class="panel-body">
                    <form class="form-inline">
                        <input type="button" class="btn btn-default" value="发送邮件" onclick="sendEmail();" />
                        <input type="button" class="btn btn-default" value="发送短信" onclick="sendSms();" />
                        <input type="button" class="btn btn-default" value="导出 Excel 表" onclick="exportExcel();" />
                        <br><br><!--
                        <input type="text" class="form-control" id="keyword" placeholder="请输入关键词">
                        &nbsp;&nbsp;&nbsp;&nbsp;
                        日期从<input type="text" class="form-control" placeholder="请输入开始日期" value="${startdate }" id="startDate" name="startdate" onclick="WdatePicker({dateFmt:'yyyy-MM-dd' ,maxDate:'#F{$dp.$D(\'endDate\')}'});"/>
                        到<input type="text" class="form-control" placeholder="请输入结束日期" value="${enddate }" id="endDate" name="enddate" onclick="WdatePicker({dateFmt:'yyyy-MM-dd' ,minDate:'#F{$dp.$D(\'startDate\')}'});" />&nbsp;&nbsp;&nbsp;&nbsp;
                        <input type="button" class="btn btn-default" value="Search" onclick="doSearch();"/>-->
                    </form>
                    <table class="table" id="mTable">
                        <thead>
                        <tr>
                            <th><input type="checkbox" onclick="doCheck();" /></th>
                            <th>序号</th>
                            <th>用户名</th>
                            <th>描述</th>
                            <th>手机</th>
                            <th>邮箱</th>
                            <th>最近登录</th>
                            <th>上次登录 IP</th>
                            <th>操作</th>
                        </tr>
                        </thead>
                        <tbody id="content">

                        </tbody>
                    </table>
                    <div id="Pagination" class="pagination"></div>
                    <!-- demo  -->
                </div>
            </div>
        </div>
    </div>
</div>
</body>
</html>

前端页面展示：

ok，本博客是基于一款正在开发中的 github 开源项目的，项目代码地址： https://github.com/u014427391/jeeplatform 欢迎 star(收藏)或者可以下载去学习，不过还在开发...