SpringData JPA实现查询分页demo

SpringData JPA 的 PagingAndSortingRepository接口已经提供了对分页的支持，查询的时候我们只需要传入一个 org.springframework.data.domain.Pageable

接口的实现类,指定PageNumber和pageSize即可

springData包中的 PageRequest类已经实现了Pageable接口，我们可以直接使用下边是部分代码：

DAO：

package com.jiaoyiping.jdjy.sourcecode.dao;

import com.jiaoyiping.jdjy.sourcecode.bean.SourceCode;
import org.springframework.data.repository.PagingAndSortingRepository;


public interface SourceCodeDao extends PagingAndSortingRepository {

}

service：

package com.jiaoyiping.jdjy.sourcecode.service;

import com.jiaoyiping.jdjy.sourcecode.bean.SourceCode;
import com.jiaoyiping.jdjy.sourcecode.dao.SourceCodeDao;
import org.apache.solr.client.solrj.SolrServerException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;

import javax.transaction.Transactional;
import java.io.IOException;
import java.sql.Timestamp;
import java.util.List;


public class SourceCodeService {
  @Autowired
  private SourceCodeDao sourceCodeDao;public Page getSourceCode(int pageNumber,int pageSize){
    PageRequest request = this.buildPageRequest(pageNumber,pageSize);
    Page sourceCodes= this.sourceCodeDao.findAll(request);
    return sourceCodes;
  }
　　//构建PageRequest
  private PageRequest buildPageRequest(int pageNumber, int pagzSize) {
    return new PageRequest(pageNumber - 1, pagzSize, null);
  }

}

controller：

package com.jiaoyiping.jdjy.sourcecode.controller;
import com.jiaoyiping.jdjy.sourcecode.Const;
import com.jiaoyiping.jdjy.sourcecode.bean.SourceCode;
import com.jiaoyiping.jdjy.sourcecode.service.SourceCodeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@Controller
@RequestMapping(value = "/sourcecode")
public class SourceCodeController {
  @Autowired
  private SourceCodeService sourceCodeService;

  
  @RequestMapping(value = "list")
  public ModelAndView listSourceCode(HttpServletRequest request, HttpServletResponse response){
    String pageNumberStr=request.getParameter("pageNumber");
    if(pageNumberStr==null ||"".equals(pageNumberStr)){
      pageNumberStr="1";
    }
    int pageNumber = Integer.parseInt(pageNumberStr);
    int pageSize = Const.PAGE_SIZE;
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.setViewName("/sourcecode/listSourceCode");
    Page sourceCodes = this.sourceCodeService.getSourceCode(pageNumber, pageSize);
    modelAndView.addObject("sourceCodeList",sourceCodes.getContent());
    modelAndView.addObject("totalPageNumber",sourceCodes.getTotalElements());
    modelAndView.addObject("pageSize",pageSize);
    return modelAndView;

  }

}

 前端分页：

前端分页组件我们使用bootstrap提供的分页组件：

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%--
 Created by IntelliJ IDEA.
 User: 焦一平
 Date: 2014/12/27
 Time: 9:57
 To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
 String basePath = request.getContextPath();
 String MethodURL=basePath+"/sourcecode/list.action?pageNumber=";
%>



 
 

 
 


 



 源代码列表

  
   /sourcecode/detail.action?id=" class="list-group-item">
  







 

最终结果如下：

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考高分网。