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服务器之家 - 编程语言 - Java教程 - Spring Data JPA+kkpager实现分页功能实例

Spring Data JPA+kkpager实现分页功能实例

2020-11-13 11:42lfendo Java教程

本篇文章主要介绍了Spring Data JPA+kkpager实现分页功能实例，具有一定的参考价值，有兴趣的可以了解一下

一、spring Data JPA分页

分页效果如下:

Spring Data JPA+kkpager实现分页功能实例

前台表格用的是: Bootstrap

分页插件用的是: kkpager

kkpager是一个js分页展示控件，传入简单参数就能使用的分页效果控件,github地址:https://github.com/pgkk/kkpager

项目结构:

Spring Data JPA+kkpager实现分页功能实例

FamilyMember实体类:

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package com.fendo.entity;
 
import java.io.Serializable;
import java.util.Date;
 
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
 
import org.hibernate.annotations.GenericGenerator;
 
 
 
@Entity
@Table(name="FAMILY_MEMBER")
public class FamilyMember implements Serializable{
 
  private Integer id;
  private String FamilyName;
  private String FamilyCharge;
  private String Mobile;
  private String Email;
  private String Address;
  private Date CreateData;
   
  @Id
  @GeneratedValue(strategy=GenerationType.IDENTITY)
  public Integer getId() {
    return id;
  }
  public void setId(Integer id) {
    this.id = id;
  }
   
   
  @Column(name="FAMILY_NAME")
  public String getFamilyName() {
    return FamilyName;
  }
  public void setFamilyName(String familyName) {
    FamilyName = familyName;
  }
   
  @Column(name="FAMILY_CHARGE")
  public String getFamilyCharge() {
    return FamilyCharge;
  }
  public void setFamilyCharge(String familyCharge) {
    FamilyCharge = familyCharge;
  }
   
  @Column(name="MOBILE")
  public String getMobile() {
    return Mobile;
  }
  public void setMobile(String mobile) {
    Mobile = mobile;
  }
   
   
  @Column(name="EMAIL")
  public String getEmail() {
    return Email;
  }
  public void setEmail(String email) {
    Email = email;
  }
   
  @Column(name="ADDRESS")
  public String getAddress() {
    return Address;
  }
  public void setAddress(String address) {
    Address = address;
  }
   
  @Column(name="CREATE_DATA")
  public Date getCreateData() {
    return CreateData;
  }
  public void setCreateData(Date createData) {
    CreateData = createData;
  }
  public FamilyMember() {
    super();
    // TODO Auto-generated constructor stub
  }
  public FamilyMember(Integer id, String familyName, String familyCharge, String mobile, String email, String address,
      Date createData) {
    super();
    this.id = id;
    FamilyName = familyName;
    FamilyCharge = familyCharge;
    Mobile = mobile;
    Email = email;
    Address = address;
    CreateData = createData;
  }
 
   
}

FamilyDao接口类:

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package com.fendo.dao;
 
import java.util.List;
import java.util.Map;
 
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.repository.PagingAndSortingRepository;
 
import com.fendo.entity.FamilyMember;
 
public interface FamilyDao extends PagingAndSortingRepository<FamilyMember, String>, JpaSpecificationExecutor<FamilyMember>{
 
 
}

FamilyService服务接口类:

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package com.fendo.service;
 
import java.util.List;
import java.util.Map;
 
import com.fendo.entity.FamilyMember;
 
public interface FamilyService {
   
  public List<FamilyMember> getAll() throws Exception;
   
  public FamilyMember save(FamilyMember familyMember) throws Exception;
   
  public Map<String, Object> getUserBySearch(Map<String, String> familyArgs, final String sortType) throws Exception;
 
}

FamilyService服务接口实现类:

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package com.fendo.service.imp;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
 
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
 
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
 
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import javax.transaction.Transactional;
 
import org.springframework.stereotype.Service;
 
import com.fendo.dao.FamilyDao;
import com.fendo.entity.FamilyMember;
import com.fendo.service.FamilyService;
import com.fendo.util.PageUtils;
 
@Service
@Transactional
public class FamilyServiceImp implements FamilyService{
 
  @Autowired
  public FamilyDao familyDao;
     
  @Override
  public List<FamilyMember> getAll() throws Exception {
    return (List<FamilyMember>) this.familyDao.findAll();
  }
 
  @Override
  public FamilyMember save(FamilyMember familyMember) throws Exception {
    return familyDao.save(familyMember);
  }
 
  /**
   * 查询用户信息列表(支持分页和多条件查询)。
   * 
   */
  @Override
  public Map<String, Object> getUserBySearch(Map<String, String> familyArgs, final String sortType) throws Exception {
 
    // 获得分页对象pageable，并且在pageable中页码是从0开始，设定按照sortType升序排列
    Pageable pageable = PageUtils.buildPageRequest(Integer.valueOf(familyArgs.get("pageNum")),
        Integer.valueOf(familyArgs.get("pageSize")), sortType);
    Page<FamilyMember> objPage = familyDao.findAll(new Specification<FamilyMember>() {
 
      public Predicate toPredicate(Root<FamilyMember> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
        List<Predicate> lstPredicates = new ArrayList<Predicate>();
 
        if (StringUtils.isNotBlank(familyArgs.get("FamilyName"))) {
          lstPredicates.add(cb.like(root.get("familyName").as(String.class), "%" + familyArgs.get("FamilyName") + "%"));
        }
        if (StringUtils.isNotBlank(familyArgs.get("Mobile"))) {
          lstPredicates.add(cb.like(root.get("mobile").as(String.class), "%" + familyArgs.get("Mobile") + "%"));
        }
         
        Predicate[] arrayPredicates = new Predicate[lstPredicates.size()];
        return cb.and(lstPredicates.toArray(arrayPredicates));
      }
    }, pageable);
 
    return PageUtils.getPageMap(objPage);
  }
 
}

前台接受参数工具类:

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package com.fendo.util;
 
import java.util.HashMap;
import java.util.Map;
 
import javax.servlet.http.HttpServletRequest;
 
/**
 * 工具类
 * @author fendo
 *
 */
public class FamilyUtil {
 
  /**
   * 封装从前台传递过来的查询参数。
   * 
   */
  public static Map<String, String> getSelArgsToMap(HttpServletRequest request) throws Exception {
    Map<String, String> serArgs = new HashMap<String, String>();
 
    String FamilyName = request.getParameter("FamilyName");
    String Mobile = request.getParameter("Mobile");
 
     
    String pageNum = request.getParameter("pageNum") == null ? "1" : request.getParameter("pageNum");
    String pageSize = request.getParameter("pageSize") == null ? "10" : request.getParameter("pageSize");
 
    serArgs.put("FamilyName", FamilyName);
    serArgs.put("Mobile", Mobile);
     
    serArgs.put("pageNum", pageNum);
    serArgs.put("pageSize", pageSize);
 
    return serArgs;
  }
 
}

分页工具类:

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package com.fendo.util;
 
import java.util.HashMap;
import java.util.Map;
 
import org.apache.commons.lang3.StringUtils;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.domain.Sort.Direction;
 
public class PageUtils {
 
  /**
   * 封装分页数据到Map中。
   */
  public static Map<String, Object> getPageMap(Page<?> objPage) {
     
    Map<String, Object> resultMap = new HashMap<String, Object>();
 
    resultMap.put("resultList", objPage.getContent()); // 数据集合
    resultMap.put("totalNum", objPage.getTotalElements()); // 总记录数
    resultMap.put("totalPage", objPage.getTotalPages()); // 总页数
    resultMap.put("pageNum", objPage.getNumber()); // 当前页码
    resultMap.put("pageSize", objPage.getSize()); // 每页显示数量
 
    return resultMap;
  }
 
  /**
   * 创建分页请求。
   *
   * @param pageNum 当前页
   * @param pageSize 每页条数
   * @param sortType 排序字段
   * @param direction 排序方向
   */
  public static PageRequest buildPageRequest(int pageNum, int pageSize, String sortType, String direction) {
    Sort sort = null;
     
    if (!StringUtils.isNotBlank(sortType)) {
      return new PageRequest(pageNum - 1, pageSize);
    } else if (StringUtils.isNotBlank(direction)) {
      if (Direction.ASC.equals(direction)) {
        sort = new Sort(Direction.ASC, sortType);
      } else {
        sort = new Sort(Direction.DESC, sortType);
      }
      return new PageRequest(pageNum - 1, pageSize, sort);
    } else {
      sort = new Sort(Direction.ASC, sortType);
      return new PageRequest(pageNum - 1, pageSize, sort);
    }
  }
 
  /**
   * 创建分页请求(该方法可以放到util类中).
   */
  public static PageRequest buildPageRequest(int pageNum, int pageSize, String sortType) {
    return buildPageRequest(pageNum, pageSize, sortType, null);
  }
   
  /**
   * 创建分页请求
   * 
   * @param pageNum
   * @param pageSize
   * @param sort
   * @return
   */
  public static PageRequest buildPageRequest(int pageNum, int pageSize, Sort sort) {
    return new PageRequest(pageNum - 1, pageSize, sort);
  }
 
  /**
   * 创建分页请求(该方法可以放到util类中).
   */
  public static PageRequest buildPageRequest(int pageNum, int pageSize) {
    return buildPageRequest(pageNum, pageSize, null, null);
  }
 
}

Controller类:

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package com.fendo.controller;
 
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
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.servlet.ModelAndView;
 
import com.fendo.entity.FamilyMember;
import com.fendo.service.imp.FamilyServiceImp;
import com.fendo.util.FamilyUtil;
 
@Controller()
@RequestMapping(value="DataTable")
public class DataTableController {
 
  @Autowired
  public FamilyServiceImp FamilyMember;
   
  @RequestMapping(value="/home_list")
  public String home(Model model,HttpServletRequest request,HttpServletResponse response){
    Map<String, Object> resultMap = new HashMap<>();
    List<FamilyMember> list;
    try {
      list = FamilyMember.getAll();
      // 查询表单或分页保持请求时 请求参数的接收
      Map<String, String> serArgs = new HashMap<String, String>();
      serArgs = FamilyUtil.getSelArgsToMap(request);//这个类在下面给出
      resultMap = FamilyMember.getUserBySearch(serArgs, "CreateData"); //按创建时间排序
      model.addAttribute("resultMap",resultMap);
    } catch (Exception e) {
      e.printStackTrace();
    }
     
    return "datatable";
  }
}

首页datatable.jsp

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<%@ page language="java" contentType="text/html; charset=utf-8"
  pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set var="ctx" value="${pageContext.request.contextPath}"/>
<!DOCTYPE html>
<html lang="zh-CN">
 <head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
  <title>Spring Data JPA分页示例</title>
 
  <!-- Bootstrap -->
  <link href="${ctx}/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet">
   
  <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
  <script src="${ctx}/js/jquery-1.10.2.min.js"></script>
   
   
  <!-- Include all compiled plugins (below), or include individual files as needed -->
  <script src="${ctx}/js/bootstrap.min.js"></script>
   
  <script type="text/javascript" src="${ctx}/js/kkpager.min.js"></script>
  <link rel="stylesheet" type="text/css" href="${ctx}/css/kkpager_blue.css" rel="external nofollow" />
 </head>
 <body>
 
  
   <div class="container">
 
    <div style="text-align:center">
     <h2>Spring Data JPA分页示例</h2>
    </div>
     
  
    <div class="panel panel-primary">
     
     <div class="panel-heading">
      <h3 class="panel-title">数据表格</h3>
     </div>
     
 
     
      <div class="panel-body" >
       
  <form class="form-inline" id="searchForm" method="post" action="${ctx}/DataTable/home_list">
     
    <div class="row">
       
       
     <div class="form-group col-sm-3">
      <input type="checkbox" id="inlineCheckbox1" value="option1">
      <label>选择所有</label>
     </div>
       
     <div class="form-group col-sm-3">
      <label>家庭名:</label>
      <input type="input" name="FamilyName" id="FamilyName" class="form-control" id="exampleInputName3" placeholder="用户名">
     </div>
      
      
     <div class="form-group col-sm-3">
      <label>手机号:</label>
 
       
      <input type="input" name="Mobile" id="Mobile" class="form-control" id="exampleInputMobile3" placeholder="手机号"></input>
       
       
     </div>
      
     <div class="col-sm-3">
      <button type="submit" class="btn btn-primary">搜索</button>
      <button type="button" class="btn btn-primary">删除</button>
     </div>
      
 
       
    </div>
     
      
  </form>
       
  <table class="table table-hover" style="margin-top:2px;">
   <thead>
    <tr>
      <th></th>
      <th>顺序</th>
      <th>家庭名称</th>
      <th>家庭Key</th>
      <th>负责人</th>
      <th>手机号</th>
      <th>邮箱</th>
      <th>家庭地址</th>
      <th>创建时间</th>
      <th>状态</th>
      <th>操作</th>
    </tr>
   </thead>
   <tbody>
    
    
    
   <c:forEach var="lise" items="${resultMap.resultList}" varStatus="status">
     <tr>
       <td><input type="checkbox" id="inlineCheckbox1" value="option1"></td>
       <th scope="row">${status.index+1}</th>
       <td>${lise.familyName}</td>
       <td>${lise.id}</td>
       <td>${lise.familyCharge}</td>
       <td>${lise.mobile }</td>
       <td>${lise.email}</td>
       <td>${lise.address}</td>
       <td>${lise.createData}</td>
       <td>启用</td>
       <td><a href="#" rel="external nofollow" >编辑</a></td>
      </tr>
     
   </c:forEach>
    
   
     
 
    
   </tbody>
  </table>
       
      </div>
    </div>
     
    <div style="width:800px;margin:0 auto;">
     
    <div id="kkpager"></div>
     
    </div>
     
   
  </div>
   
  <script>
   
  var param = "";
   
   
  $(function() {
    var totalPage = "${resultMap.totalPage}";
    var totalRecords = "${resultMap.totalNum}";
    var pageSize = "${resultMap.pageSize}";
 
    var pageNum = parseInt("${resultMap.pageNum}") + 1;
    //初始化分页控件
    //有些参数是可选的，比如lang，若不传有默认值
    kkpager.init({
      pno: pageNum,
      //总页码
      total: "${resultMap.totalPage}",
      //总数据条数
      totalRecords: totalRecords,
      //链接前部
      hrefFormer: '${ctx}/DataTable/home_list',
      //链接尾部
      hrefLatter: '',
      getLink: function(n) {
        return getInitParam() + "&pageNum=" + n + "&pageSize=" + pageSize;
      },
      lang: {
        prePageText: '上一页',
        nextPageText: '下一页',
        totalPageBeforeText: '共',
        totalPageAfterText: '页',
        totalRecordsAfterText: '条数据',
        gopageBeforeText: '转到',
        gopageButtonOkText: '确定',
        gopageAfterText: '页',
        buttonTipBeforeText: '第',
        buttonTipAfterText: '页'
      }
    });
    //生成
    kkpager.generPageHtml();
 
    $('#mykkpagerselect').val(pageSize);
  });
   
   
  function getInitParam() {
    var FamilyName = $('#FamilyName').val();
    var Mobile = $('#Mobile').val();
 
    var attr = "?FamilyName=" + encodeURI(encodeURI(FamilyName)) 
        + "&Mobile=" + Mobile;
    return "${ctx}/DataTable/home_list" + attr;
  }
 
  /**
   * 搜索。
   */
  function search() {
    $('#searchForm').submit();
  }  
   
 
  </script>
 
 </body>
</html>

完整示例: SpringData-JPA.rar

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。

原文链接：http://blog.csdn.net/u011781521/article/details/73050552?utm_source=tuicool&utm_medium=referral

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