sqlserver实现分页的几种方式

Posted 2020-09-14 锋齐叶落

sqlserver实现分页的几种方式

第一种:使用org.springframework.data.domain.Page来进行分页

package com.cellstrain.icell.repository.repositoryImpl;

import com.cellstrain.icell.entity.V_Paper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import org.springframework.util.StringUtils;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import java.util.List;
import java.util.Map;

@Repository(value = "vPaperRepository")
public class VPaperRepositoryImpl {
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @PersistenceContext
    private EntityManager entityManager;

    /**
     * 后台分页查询
     * @param condition
     * @param pageable
     * @return
     */
    public Page findByCondition(String condition, Pageable pageable){
        StringBuffer hql = new StringBuffer("from V_Paper p where ");
        if(!StringUtils.isEmpty(condition)){
            hql.append("p.title like ‘%"+condition+"%‘ or p.entryName like ‘%"+condition+"%‘ or p.pName like ‘%"+condition+"%‘ or p.auth like ‘%"+condition+"%‘ order by p.paperId desc");
        }else{
            hql.append("1=1 order by p.paperId desc");
        }
        Query query = entityManager.createQuery(hql.toString());
        //得到符合记录的总数
        int count = query.getResultList().size();
        Long total = (long)count;
        //分页查询
        query.setFirstResult(pageable.getOffset());
        query.setMaxResults(pageable.getPageSize());
        List<V_Paper> proteinRanksList = query.getResultList();
        //封装Page
        Page<V_Paper> page =new PageImpl<V_Paper>(proteinRanksList,pageable,total);
    }
    
}

第二种:使用top关键字来进行分页

package com.cellstrain.icell.repository.repositoryImpl;

import com.cellstrain.icell.entity.V_Paper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import org.springframework.util.StringUtils;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import java.util.List;
import java.util.Map;

@Repository(value = "vPaperRepository")
public class VPaperRepositoryImpl {
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @PersistenceContext
    private EntityManager entityManager;

    /**
     * 后台分页查询
     * @param condition
     * @param pageable
     * @return
     */
    public Page findByCondition(String condition, Pageable pageable){
        if(StringUtils.isEmpty(condition)){
            condition="";
        }
        int pageSize=pageable.getPageSize();
        int pageNow=pageable.getPageNumber();
        String sql="select top "+pageSize+" vp.paperId,vp.title,vp.entryName,vp.source,vp.recordDate,vp.url,vp.auth,dbo.JoinStr(vp.paperId) as pNames" +
                " from V_Paper vp where vp.paperId not in(select top "+pageSize*pageNow+" paperId from V_Paper order by paperId desc) and (title like ‘%"+condition+"%‘ or contents like ‘%"+condition+"%‘) " +
                "group by vp.paperId,vp.title,vp.entryName,vp.source,vp.recordDate,vp.url,vp.auth order by vp.paperId desc";
        List paperList=null;
        Long total = jdbcTemplate.queryForObject("select count(*) from V_Paper",Long.class);
        try{
            paperList=jdbcTemplate.queryForList(sql);
        }catch (Exception e){
            e.printStackTrace();
        }
        Page page = new PageImpl(paperList, pageable, total);
        return page;
    }
}

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