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SpringData中的分页功能如何留JPA+kkpager实现

Spring Data中的分页功能如何留 JPA+kkpager实现？相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

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一、spring Data JPA分页

分页效果如下:

Spring Data中的分页功能如何留 JPA+kkpager实现

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中的分页功能如何留 JPA+kkpager实现

FamilyMember实体类:

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:

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, JpaSpecificationExecutor{ 
 
 
}

FamilyService服务接口类:

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

FamilyService服务接口实现类:

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 getAll() throws Exception { 
    return (List) 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 getUserBySearch(Map 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 objPage = familyDao.findAll(new Specification() { 
 
      public Predicate toPredicate(Root root, CriteriaQuery<?> query, CriteriaBuilder cb) { 
        List lstPredicates = new ArrayList(); 
 
        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:

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 getSelArgsToMap(HttpServletRequest request) throws Exception { 
    Map serArgs = new HashMap(); 
 
    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:

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 getPageMap(Page<?> objPage) { 
     
    Map resultMap = new HashMap(); 
 
    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:

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 resultMap = new HashMap<>(); 
    List 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 serArgs = new HashMap(); 
      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

<%@ page language="java" contentType="text/html; charset=utf-8" 
  pageEncoding="utf-8"%> 
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 
 
 
 
  
   
   
   
   
  Spring Data JPA分页示例 
 
   
   
   
   
   
   
   
   
   
   
   
   
  
  
 
  
   
 
 
    
 
     
Spring Data JPA分页示例
 
    
 
     
  
    
 
     
     
 
      
数据表格
 
     
 
     
 
     
      
 
       
  
 
     
    
 
       
       
     
 
       
       
     
 
       
     
 
       
       
     
 
      
      
     
 
       
 
       
       
       
       
     
 
      
     
 
       
       
     
 
      
 
       
    
 
     
      
  
 
       
   
     
 
    
    
 
       
      顺序 
      家庭名称 
      家庭Key 
      负责人 
      手机号 
      邮箱 
      家庭地址 
      创建时间 
      状态 
      操作 
    
 
    
    
    
    
    
   
 
        
       ${status.index+1} 
       ${lise.familyName} 
       ${lise.id} 
       ${lise.familyCharge} 
       ${lise.mobile } 
       ${lise.email} 
       ${lise.address} 
       ${lise.createData} 
       启用 
       编辑

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