一般需要两个方法，一个查条数，一个查当前页数据



    @Query(value = "" +
            "" +
            " select " +
            "a.id," +
            "a.title," +
            "a.article_abstract," +
            "a.author_id," +
            "a.like_count ," +
            "a.read_count," +
            "a.tags," +
            "a.create_time," +
            "a.update_time," +
            "a.type," +
            "a.`status` " +
            " from re_article_category rac " +
            "" +
            " left join " +
            " article a " +
            "" +
            " on a.id=rac.article_id " +
            "" +
            " where rac.category_id= :catId" +
            " and a.status = :status limit :start,:size",nativeQuery = true)
    List<Object[]> pageByCatId(@Param("catId") Integer catId,@Param("status")String status,@Param("start")long start, @Param("size")int size);

   @Query(value = "select" +
           " count(a.id)" +
           " from re_article_category rac" +
           "" +
           " left join " +
           " article a" +
           "" +
           " on a.id=rac.article_id" +
           "" +
           " where rac.category_id= :catId" +
           " and a.status= :status",nativeQuery = true)
    Integer countByCat(@Param("catId") Integer catId,@Param("status") String status);

service 层转换：

    //根据分类获取所有文章
    @Override
    public Result getPageByCatId(Integer catId, Integer limit, Integer pageNo) { 
   

  PageRequest pageRequest = PageRequest.of(pageNo, limit);//借助计算起始位置
        int total=blogDao.countByCat(catId,BLOG_STATUS_NORMAL);// 计算数据总条数
        List<Object[]> records=blogDao.pageByCatId(catId,BLOG_STATUS_NORMAL,pageRequest.getOffset(),pageRequest.getPageSize());// 获取分页数据
        Page<Object[]> page =new Page<>(records,limit,pageNo,total);
           page.transferFromSqlList(BlogModel.class);// 转换分页数据到具体的java bean
        return Result.success(page);


    }
}

Page.java(自定义工具）


package com.blog.demo.common.util;

import com.google.common.collect.Lists;
import org.springframework.data.domain.PageImpl;

import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/** * 与具体ORM实现无关的分页参数及查询结果封装. * * * @param <T> Page中记录的类型. * * @author eagler006 email:eagler006@hotmail.com * @version 1.2 */
public class Page<T> { 
   


	//-- 分页参数 --//
	protected int pageNo = 1;
	protected int pageSize = 15;
	protected int first =-1; //此处添加主要是为了方便分库分表时计算各表步进取值，当大于0时说明getFirst()函数不从pageNo计算获得
	protected boolean autoCount = true;
	protected String sort="id";
	protected String dir= "ASC";
	//-- 返回结果 --//
	protected List result = Lists.newArrayList();
	protected long totalCount = -1;

	//-- 构造函数 --//
	public Page() { 
   
	}
   public Page(List<Object[]> data,int size,int pageNo,int totalCount){ 
   
		setPageNo(pageNo);
		setPageSize(size);
		setTotalCount(totalCount);
		setResult(data);

   }
	public Page(int pageSize) { 
   
		this.pageSize = pageSize;
	}

	public void transferFromSqlList(Class clazz){ 
   
		List tResult = Lists.newArrayList();
		ArrayList<Object> objArr;
		for (Object objItem : result){ 
   
			try { 
   
				objArr = new ArrayList<Object>(Arrays.asList((Object[]) objItem));
				Constructor<T> constructor = clazz.getDeclaredConstructor(objArr.getClass());
				tResult.add(constructor.newInstance(objArr));
			} catch (Exception e){ 
   
				e.printStackTrace();
			}
		}
		this.result = tResult;
	}

	public void copyPropertiesFromAnother(Page<?> page){ 
   
		this.pageNo = page.getPageNo();
		this.pageSize = page.getPageSize();
		this.first = page.getFirst();
		this.autoCount = page.isAutoCount();
		this.sort = page.getSort();
		this.dir = page.getDir();
		this.totalCount = page.getTotalCount();
	}

	//-- 访问查询参数函数 --//
	/** * 获得当前页的页号,序号从1开始,默认为1. */
	public int getPageNo() { 
   
		return pageNo;
	}

	/** * 设置当前页的页号,序号从1开始,低于1时自动调整为1. */
	public void setPageNo(final int pageNo) { 
   
		this.pageNo = pageNo;

		if (pageNo < 1) { 
   
			this.pageNo = 1;
		}
	}

	public Page<T> pageNo(final int thePageNo) { 
   
		setPageNo(thePageNo);
		return this;
	}

	/** * 获得每页的记录数量,默认为1. */
	public int getPageSize() { 
   
		return pageSize;
	}

	/** * 设置每页的记录数量,低于1时自动调整为1. */
	public void setPageSize(final int pageSize) { 
   
		this.pageSize = pageSize;

		if (pageSize < 1) { 
   
			this.pageSize = 1;
		}
	}

	public Page<T> pageSize(final int thePageSize) { 
   
		setPageSize(thePageSize);
		return this;
	}

	
	
	/** * @return the sort */
	public String getSort() { 
   
		return sort;
	}

	/** * @param sort the sort to set */
	public void setSort(String sort) { 
   
		this.sort = sort;
	}

	/** * @return the dir */
	public String getDir() { 
   
		return dir;
	}

	/** * @param dir the dir to set */
	public void setDir(String dir) { 
   
		this.dir = dir;
	}

	/** * 根据pageNo和pageSize计算当前页第一条记录在总结果集中的位置,序号从1开始. */
	public int getFirst() { 
   
		if(this.first>0)
			return first;
		return ((pageNo - 1) * pageSize) + 1;
	}

	

	/** * @param first the first to set */
	public void setFirst(int first) { 
   
		this.first = first;
	}

	/** * 查询对象时是否自动另外执行count查询获取总记录数, 默认为false. */
	public boolean isAutoCount() { 
   
		return autoCount;
	}

	/** * 查询对象时是否自动另外执行count查询获取总记录数. */
	public void setAutoCount(final boolean autoCount) { 
   
		this.autoCount = autoCount;
	}

	public Page<T> autoCount(final boolean theAutoCount) { 
   
		setAutoCount(theAutoCount);
		return this;
	}

	//-- 访问查询结果函数 --//

	/** * 取得页内的记录列表. */
	public List getResult() { 
   
		return result;
	}

	/** * 设置页内的记录列表. */
	public void setResult(final List result) { 
   
		this.result = result;
	}

	/** * 取得总记录数, 默认值为-1. */
	public long getTotalCount() { 
   
		return totalCount;
	}

	/** * 设置总记录数. */
	public void setTotalCount(final long totalCount) { 
   
		this.totalCount = totalCount;
	}

	/** * 根据pageSize与totalCount计算总页数, 默认值为-1. */
	public long getTotalPages() { 
   
		if (totalCount < 0) { 
   
			return -1;
		}

		long count = totalCount / pageSize;
		if (totalCount % pageSize > 0) { 
   
			count++;
		}
		return count;
	}

	/** * 是否还有下一页. */
	public boolean isHasNext() { 
   
		return (pageNo + 1 <= getTotalPages());
	}

	/** * 取得下页的页号, 序号从1开始. * 当前页为尾页时仍返回尾页序号. */
	public int getNextPage() { 
   
		if (isHasNext()) { 
   
			return pageNo + 1;
		} else { 
   
			return pageNo;
		}
	}

	/** * 是否还有上一页. */
	public boolean isHasPre() { 
   
		return (pageNo - 1 >= 1);
	}

	/** * 取得上页的页号, 序号从1开始. * 当前页为首页时返回首页序号. */
	public int getPrePage() { 
   
		if (isHasPre()) { 
   
			return pageNo - 1;
		} else { 
   
			return pageNo;
		}
	}
}

效果：

{
  "code": 0,
  "msg": "success",
  "data": {
    "pageNo": 1,
    "pageSize": 10,
    "first": 1,
    "autoCount": true,
    "sort": "id",
    "dir": "ASC",
    "result": [
      {
        "id": 73,
        "title": "标题",
        "content": null,
        "articleAbstract": "这是简介，请勿惊讶?",
        "tags": "string",
        "type": "1",
        "readCount": null,
        "likeCount": 1,
        "status": "0",
        "createTime": "2019-06-06T04:32:01.000+0000",
        "updateTime": "2019-06-06T04:32:01.000+0000",
        "categoryId": null
      },
      {
        "id": 107,
        "title": "正式文章",
        "content": null,
        "articleAbstract": "发布一篇文章",
        "tags": "string",
        "type": "0",
        "readCount": 0,
        "likeCount": 1,
        "status": "0",
        "createTime": "2019-06-06T10:32:11.000+0000",
        "updateTime": "2019-06-06T10:32:11.000+0000",
        "categoryId": null
      }
    ],
    "totalCount": 2,
    "prePage": 1,
    "hasNext": false,
    "nextPage": 1,
    "hasPre": false,
    "totalPages": 1
  }
}

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