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Spring MVC结合Spring Data JPA实现按条件查询和分页

作者:王晓东1号  发布时间:2023-03-04 07:24:36 

标签:Spring,条件查询,分页

本文实例为大家分享了Android九宫格图片展示的具体代码,供大家参考,具体内容如下

推荐视频:尚硅谷Spring Data JPA视频教程,一学就会,百度一下就有。

后台代码:在DAO层继承Spring Data JPA的PagingAndSortingRepository接口实现的 (实现方法主要在SbglServiceImpl.java类中)

前台表现:用kkpaper表现出来

实现效果:

Spring MVC结合Spring Data JPA实现按条件查询和分页

1、实体类


package com.jinhetech.yogurt.sbgl.entity;

import java.io.Serializable;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.PrimaryKeyJoinColumn;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

import org.hibernate.annotations.GenericGenerator;
import org.springframework.cache.annotation.Cacheable;
@Entity
@Table(name="SYS_SBGL")
@PrimaryKeyJoinColumn(name = "SBBM")
@Cacheable(value = "baseCache")
public class Sbgl implements Serializable{

private static final long serialVersionUID = -1423899016746755470L;

@Id
 private String sbbm;

private String sbmc;
 private String sblx;
 private String sssx;
 private String ssjd;

private String azsj;
 private String azry;
 private String sbzt;
 private String sbjd;
 private String sbwd;

private String wxlxr;
 private String wxlxdh;
 private String sbywxcs;
 private String jzpylyz;
 private String mqsbcyr;
 private String bzsm;

//setter、getter方法省略

}

2、jsp页面,看最下面的分页组件(kkpaper)

resultMap集合是下面Controller中最后查询和分页后获得的所有数据信息,resultMap.resultList:resultList是Map集合的属性,里面存着<key,value>数据


<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<%@ taglib prefix="shiro" uri="http://shiro.apache.org/tags" %>
<!doctype html>

<c:set var="ctx" value="${pageContext.request.contextPath}" scope="session"/>

<html>
<head>
 <title>设备管理</title>
 <!-- zTree需要的样式和js -->
 <link rel="stylesheet" href="${ctx }/yogurtResource/assembly/ztree/css/zTreeStyle.css" rel="external nofollow" type="text/css">
 <script type="text/javascript" src="${ctx }/yogurtResource/assembly/ztree/jquery.ztree.core-3.5.js"></script>
 <script type="text/javascript" src="${ctx }/yogurtResource/assembly/ztree/jquery.ztree.excheck-3.5.js"></script>

<!-- 验证框架 -->
 <script type="text/javascript" src="${ctx }/yogurtResource/assembly/yogurt/user/formValidate.js"></script>

<!-- 修改表单验证错误提示样式 -->
 <style type="text/css">
   .table-bordered-ul li{ margin:0 5px; float:left}
   label.error {
    padding-left: 16px;

padding-bottom: 2px;

font-weight: bold;

color: #F00;
   }
 </style>

<script type="text/javascript">
 function console(consoleTag, userId, stateTag) {
     // 添加用户。
   if("add" == consoleTag) {
     $('#formid').prop("action", "${ctx}/sbgl/sbgl_add_list");
   }

}

/**
  * 搜索。
  */
 function search() {
   $('#searchForm').submit();
 }      

</script>

</head>

<body>
 <div class="clear">
   <div class="panel panel-default yogurt_route" id="yogurt_route">
     <a href="${ctx }/home/home_list" rel="external nofollow" >首页</a> > <a
       href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="navigate();">设备管理</a> > 设备列表
   </div>
 </div>

<ul id="bqnum">
   <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="navigate();">导航</a>
   </li>
   <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="orgTree();">机构</a>
   </li>
 </ul>

<!-- 根据条件查询 -->
 <div class="clear ppd10" style="line-height:32px">
   <form action="${ctx }/sbgl/sbgl_list" method="post" id="searchForm">
     <div style="float:left; width:200px">
       设备名称:
       <input type="text" name="serSbmc" id="serSbmc" >
     </div>
     <div class="floatleft">
       &nbsp;&nbsp;设备类型:
       <input type="text" name="serSblx" id="serSblx" >
     </div>
     <div class="floatleft">
       &nbsp;&nbsp;所属市县:
       <input type="text" name="serSssx" id="serSssx" >
     </div>
     <div class="floatleft">
       &nbsp;&nbsp;基地名称:
       <input type="text" name="serJdmc" id="serJdmc" >
     </div>
     <div class="floatleft">
       &nbsp;&nbsp;设备状态:
       <select class="form-control" style="display:inline-block; width:80px" name="serSbzt" id="serSbzt">
         <option value="">全部</option>
         <option value="Y">正常</option>
         <option value="N">异常</option>
       </select>
     </div>&nbsp;&nbsp;&nbsp;&nbsp;
     <button type="submit" class="btn btn-success yogurt_search_button" onclick="search();">
       <img src="${ctx }/yogurtResource/images/Panel/search.png" width="18" height="18" />
     </button>
   </form>
 </div>

<!-- 新增、删除 -->
 <div class="panel panel-default" style="margin-top:10px">
   <div class="yogurt_panel_title_core">
     <span class="state_bold">共查询出数据结果:<span class="state_red">${resultMap.totalNum}</span>条</span>
   </div>
   <div class="more_core3">
     <!-- <button type="button" class="btn btn-success yogurt_search_button2" onclick="console('add','');">新增设备</button> -->
     <button type="button" class="btn btn-success yogurt_search_button2" onclick="window.location.href='${ctx }/sbgl/sbgl_add_list' ">新增设备</button>
     <button type="button" class="btn btn-success yogurt_search_button2" onclick="console('delete','');">删除设备</button>
   </div>
 </div>
 <!-- 列表 -->
 <div class="yogurt_elementsbox_core clear">
   <div class="yogurt_elementsbox_table_article" id="yogurt_elementsbox_table_article">
     <table id="tableBody" border="0" cellspacing="0" cellpadding="0" class="table yogurt_elementsbox_table">
       <thead>
         <tr class="yogurt_tab_back" onmouseover="this.className='yogurt_tab_trhover'" onmouseout="this.className='yogurt_tab_back'">
           <th width="3%"><input type="checkbox" onClick="allchecked(this)"></th>
           <th width="10%">设备名称</th>
           <th width="10%">设备类型</th>
           <th width="10%">所属市县</th>
           <th width="10%">基地名称</th>
           <th width="10%">设备状态</th>
           <th width="10%">维修联系人</th>
           <th width="10%">联系电话</th>
           <th width="10%">设备持有人</th>
           <th width="17%" style="text-align:center;">操作</th>
         </tr>
       </thead>
       <tbody id="userTb">
         <c:forEach var="sbgl" items="${resultMap.resultList}" varStatus="status">
           <tr>
             <td><input type="checkbox" ></td>
             <td>${sbgl.sbmc }</td>
             <td>${sbgl.sblx }</td>
             <td>${sbgl.sssx }</td>
             <td>${sbgl.ssjd }</td>
             <td>${sbgl.sbzt }</td>
             <td>${sbgl.wxlxr }</td>
             <td>${sbgl.wxlxdh }</td>
             <td>${sbgl.mqsbcyr }</td>
             <td style="text-align:center">
               <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="console('update', '${user.userId}')"> 修改</a>
               <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="showRoles('${user.userId}')">| 查看</a>
             </td>
           </tr>
         </c:forEach>
       </tbody>

</table>

</div>
 </div>

<!--分页-->
 <div style="clear:both; height:50px">
   <!--加载分页组件-->
   <div id="kkpager"></div>
   <script type="text/javascript">
     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: 'sbgl_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 returnoption(pageSize) {
       window.location.href = getInitParam() + "&pageNum=1&pageSize=" + pageSize;
     }

function getInitParam() {
       var serSbmc = $('#serSbmc').val();
       var serSblx = $('#serSblx').val();
       var serSssx = $('#serSssx').val();
       var serJdmc = $('#serJdmc').val();
       var serSbzt = $('#serSbzt').val();

var attr = "?serSbmc=" + encodeURI(encodeURI(serSbmc))
           + "&serSblx=" + serSblx + "&serSssx=" + serSssx + "&serJdmc=" + serJdmc+ "&serSbzt=" + serSbzt;
       return "${ctx}/sbgl/sbgl_list" + attr;
     }
   </script>
   <!--分页结束-->
 </div>
 <!--分页end-->

</body>
</html>

3、Controller(看红色字体下面那个处理方法)


package com.jinhetech.yogurt.sbgl.controller;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.annotation.Resource;

import org.apache.shiro.authz.annotation.RequiresPermissions;
import org.apache.shiro.authz.annotation.RequiresRoles;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import org.springframework.web.servlet.view.RedirectView;

import com.jinhetech.yogurt.dictionary.crop.service.impl.CropServiceImpl;
import com.jinhetech.yogurt.func.entity.Func;
import com.jinhetech.yogurt.func.service.FuncService;
import com.jinhetech.yogurt.menu.entity.Menu;
import com.jinhetech.yogurt.menu.service.MenuService;
import com.jinhetech.yogurt.menu.util.MenuUtil;
import com.jinhetech.yogurt.organization.entity.OrgTable;
import com.jinhetech.yogurt.organization.service.OrgService;
import com.jinhetech.yogurt.organization.util.OrgUtil;
import com.jinhetech.yogurt.role.entity.Role;
import com.jinhetech.yogurt.role.service.RoleService;
import com.jinhetech.yogurt.sbgl.dao.SbglDao;
import com.jinhetech.yogurt.sbgl.entity.Sbgl;
import com.jinhetech.yogurt.sbgl.service.SbglService;
import com.jinhetech.yogurt.sbgl.util.SbglUtil;
import com.jinhetech.yogurt.user.entity.User;
import com.jinhetech.yogurt.user.entity.UserInfo;
import com.jinhetech.yogurt.user.service.UserService;
import com.jinhetech.yogurt.user.util.UserUtil;
import com.jinhetech.yogurt.util.base.BaseController;
import com.jinhetech.yogurt.util.base.Constants;
import com.jinhetech.yogurt.util.common.TextUtils;
import com.jinhetech.yogurt.util.common.UUIDHexGenerator;

/**
* 系统用户管理控制类
*
* @author Wang Hao
* @version 1.0 2014-02-28 初版
*/
@Controller("sbglController")
@RequestMapping("/sbgl")
public class SbglController extends BaseController {
//  @Resource(name = "sbglDao")
//  private SbglDao sbglDao;

@Resource(name = "sbglService")
 private SbglService sbglService;

/**
  * 平台权限管理导航*/
 @RequestMapping("/home_list")
 public ModelAndView home() {

return new ModelAndView("iot/permis/permis_home");
 }

/**
  * 查询设备信息列表(支持分页和多条件查询)。
  *
  */
 @RequestMapping("sbgl_list")
 @RequiresRoles("sbgl/sbgl_list")
 public String getUserList(Model model) throws Exception {
   //显示设备列表
//    List<Sbgl> lst=new ArrayList<Sbgl>();
//    lst=(List<Sbgl>) sbglService.getAll();

Map<String, Object> resultMap = null;
   // 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 = SbglUtil.getSelArgsToMap(request);//这个类在下面给出

resultMap = sbglService.getUserBySearch(serArgs, "wxlxdh");

model.addAttribute("resultMap", resultMap);
//    model.addAttribute("lst", lst);

return "sbgl/sbgl_list";
 }

/**
  * 新增设备信息列表(支持分页和多条件查询)。
  *
  * @author YangZhenghua 2014-5-28
  * @throws Exception
  */
 @RequestMapping("sbgl_add_list")
 @RequiresRoles("sbgl/sbgl_add_list")
 public String getAddList(Model model) throws Exception {

System.out.println("aaa");
   model.addAttribute("aaa","aaa");
   model.addAttribute("resultMap", "hello world");

return "sbgl/sbgl_add_list";
 }

/**
  * 保存、修改用户信息。
  *
  * @author YangZhenghua 2014-5-28
  * @throws Exception
  */
 @RequestMapping("sbgl_save_list")
 @RequiresRoles("sbgl/sbgl_save_list")
 public ModelAndView SaveSbgl(Sbgl sbgl) throws Exception {

String sbmc=request.getParameter("sbmc");
   String sblx=request.getParameter("sblx");
   String sssx=request.getParameter("sssx");
   String ssjd=request.getParameter("ssjd");
   String azsj=request.getParameter("azsj");

String azry=request.getParameter("azry");
   String sbzt=request.getParameter("sbzt");
   String sbjd=request.getParameter("sbjd");
   String sbwd=request.getParameter("sbwd");
   String wxlxr=request.getParameter("wxlxr");

String wxlxdh=request.getParameter("wxlxdh");
   String sbywxcs=request.getParameter("sbywxcs");
   String jzpylyz=request.getParameter("jzpylyz");
   String mqsbcyr=request.getParameter("mqsbcyr");
   String bzsm=request.getParameter("bzsm");

sbgl.setSbbm(UUIDHexGenerator.generate());
   sbgl.setSbmc(sbmc);
   sbgl.setSblx(sblx);
   sbgl.setSssx(sssx);
   sbgl.setSsjd(ssjd);
   sbgl.setAzsj(azsj);

sbgl.setAzry(azry);
   sbgl.setSbzt(sbzt);
   sbgl.setSbjd(sbjd);
   sbgl.setSbwd(sbwd);
   sbgl.setWxlxr(wxlxr);

sbgl.setWxlxdh(wxlxdh);
   sbgl.setSbywxcs(sbywxcs);
   sbgl.setJzpylyz(jzpylyz);
   sbgl.setMqsbcyr(mqsbcyr);
   sbgl.setBzsm(bzsm);

sbglService.save(sbgl);

return new ModelAndView(new RedirectView("sbgl_list"));
 }

}

3.2、SbglUtil.java

封装从前台传递过来的查询参数、前台传递过来的分页参数,都放到Map集合serArgs中


package com.jinhetech.yogurt.sbgl.util;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import com.jinhetech.yogurt.organization.entity.OrgTable;
import com.jinhetech.yogurt.report.entity.Report;
import com.jinhetech.yogurt.role.entity.Role;
import com.jinhetech.yogurt.user.entity.User;
import com.jinhetech.yogurt.user.entity.UserInfo;
import com.jinhetech.yogurt.util.common.JSONUtils;
import com.jinhetech.yogurt.util.common.TextUtils;

/**
* 用户功能模块工具类。
*
* @author YangZhenghua
* @version V1.0 2014-5-16 初版
*
*/
public class SbglUtil {

/**
  * 封装从前台传递过来的查询参数。
  *
  * @author YangZhenghua
  * @date 2014-6-26
  */
 public static Map<String, String> getSelArgsToMap(HttpServletRequest request) throws Exception {
   Map<String, String> serArgs = new HashMap<String, String>();

String serSbmc = request.getParameter("serSbmc");
   String serSblx = request.getParameter("serSblx");
   String serSssx = request.getParameter("serSssx");
   String serJdmc = request.getParameter("serJdmc");
   String serSbzt = request.getParameter("serSbzt");

String pageNum = request.getParameter("pageNum") == null ? "1" : request.getParameter("pageNum");
   String pageSize = request.getParameter("pageSize") == null ? "10" : request.getParameter("pageSize");

//serArgs.put("serUserName", java.net.URLDecoder.decode(serUserName == null ? "" : serUserName, "UTF-8"));
   serArgs.put("serSbmc", serSbmc);
   serArgs.put("serSblx", serSblx);
   serArgs.put("serSssx", serSssx);
   serArgs.put("serJdmc", serJdmc);
   serArgs.put("serSbzt", serSbzt);

serArgs.put("pageNum", pageNum);
   serArgs.put("pageSize", pageSize);

return serArgs;
 }

}

3.3、SbglService.java


package com.jinhetech.yogurt.sbgl.service;

import java.util.List;
import java.util.Map;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.jinhetech.yogurt.sbgl.entity.Sbgl;

public interface SbglService {

public List<Sbgl> getAll() throws Exception;

public Sbgl save(Sbgl sbgl) throws Exception;

public Map<String, Object> getUserBySearch(Map<String, String> serArgs, final String sortType) throws Exception;

}

3.4、SbglServiceImpl.java (根据前台传递来的查询参数进行查询,获得的结果数据放到Page objPage参数)


package com.jinhetech.yogurt.sbgl.service.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.ListJoin;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.jinhetech.yogurt.role.entity.Role;
import com.jinhetech.yogurt.sbgl.dao.SbglDao;
import com.jinhetech.yogurt.sbgl.entity.Sbgl;
import com.jinhetech.yogurt.sbgl.service.SbglService;
import com.jinhetech.yogurt.user.entity.UserInfo;
import com.jinhetech.yogurt.util.common.PageUtils;
import com.jinhetech.yogurt.util.common.TextUtils;

@Service("sbglService")
@Transactional
public class SbglServiceImpl implements SbglService{

@Resource(name = "sbglDao")
 private SbglDao sbglDao;

public List<Sbgl> getAll() throws Exception{

return (List<Sbgl>) this.sbglDao.findAll();
 }

public Sbgl save(Sbgl sbgl) throws Exception {
   return sbglDao.save(sbgl);
 }

/**
  * 查询用户信息列表(支持分页和多条件查询)。
  *
  * @author YangZhenghua 2014-6-19
  */
 public Map<String, Object> getUserBySearch(final Map<String, String> serArgs, 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(serArgs.get("pageNum")),
       Integer.valueOf(serArgs.get("pageSize")), sortType);

Page<Sbgl> objPage = sbglDao.findAll(new Specification<Sbgl>() {

public Predicate toPredicate(Root<Sbgl> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
       List<Predicate> lstPredicates = new ArrayList<Predicate>();

if (TextUtils.isNotBlank(serArgs.get("serSbmc"))) {
         lstPredicates.add(cb.like(root.get("sbmc").as(String.class), "%" + serArgs.get("serSbmc") + "%"));
       }
       if (TextUtils.isNotBlank(serArgs.get("serSblx"))) {
         lstPredicates.add(cb.like(root.get("sblx").as(String.class), "%" + serArgs.get("serSblx") + "%"));
       }
       if (TextUtils.isNotBlank(serArgs.get("serSssx"))) {
         lstPredicates.add(cb.like(root.get("sssx").as(String.class), "%" + serArgs.get("serSssx") + "%"));
       }
       if (TextUtils.isNotBlank(serArgs.get("serJdmc"))) {
         lstPredicates.add(cb.like(root.get("jdmc").as(String.class), "%" + serArgs.get("serJdmc") + "%"));
       }

if (TextUtils.isNotBlank(serArgs.get("serSbzt"))) {
         lstPredicates.add(cb.equal(root.get("sbzt"), serArgs.get("serSbzt")));
       }

Predicate[] arrayPredicates = new Predicate[lstPredicates.size()];
       return cb.and(lstPredicates.toArray(arrayPredicates));
     }
   }, pageable);

return PageUtils.getPageMap(objPage);
 }

}

3.4.1、PageUtils.java(分页数据工具类)


package com.jinhetech.yogurt.util.common;

import java.util.HashMap;
import java.util.Map;

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;

import com.jinhetech.yogurt.util.base.Constants;

/**
* 分页数据工具类。
*
* @author YangZhenghua
* @version V1.0 2014-6-24 初版
*
*/
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(Constants.PAGE_RESULT_LIST, objPage.getContent()); // 数据集合
   resultMap.put(Constants.PAGE_TOTAL_NUM, objPage.getTotalElements()); // 总记录数
   resultMap.put(Constants.PAGE_TOTAL_PAGE, objPage.getTotalPages()); // 总页数
   resultMap.put(Constants.PAGE_NUM, objPage.getNumber()); // 当前页码
   resultMap.put(Constants.PAGE_SIZE, objPage.getSize()); // 每页显示数量

return resultMap;
 }

/**
  * 创建分页请求。
  *
  * @author YangZhenghua
  * @date 2014-7-14
  *
  * @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 (!TextUtils.isNotBlank(sortType)) {
     return new PageRequest(pageNum - 1, pageSize);
   } else if (TextUtils.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
  *
  * @author YangZhenghua
  * @date 2014-11-12
  *
  * @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);
 }

}

 4、DAO(SbglDao.java),对,只需要继承Spring Data JPA的PagingAndSortingRepository接口,Controller中调用其findAll()方法


package com.jinhetech.yogurt.sbgl.dao;

import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.PagingAndSortingRepository;
import org.springframework.stereotype.Repository;

import com.jinhetech.yogurt.sbgl.entity.Sbgl;
import com.jinhetech.yogurt.user.entity.UserInfo;

@Repository("sbglDao")
public interface SbglDao extends PagingAndSortingRepository<Sbgl, String>, JpaSpecificationExecutor<Sbgl> {

}

来源:http://www.cnblogs.com/Donnnnnn/p/6277872.html

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