分页 后台代码

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entity

page 实体类  用户来 controller 进行返回

package com.big.data.lab.entity;

import java.util.List;

/**
 * 分页实体类
 *  分页 查询 时候  返回的 类型  
 * */
@SuppressWarnings("rawtypes")
public class Page {
	private List rows;//存储 分页 所查询的 集合
	private long total;// 总行数
	private Long allPage;// 所有页数
	private Integer newPage;// 当前页数
	
	public Page(){}
	
	public Page(List rows, long total) {
		super();
		this.rows = rows;
		this.total = total;
	}
	
	public Long getAllPage() {
		return allPage;
	}

	public void setAllPage(Long allPage) {
		this.allPage = allPage;
	}

	public Integer getNewPage() {
		return newPage;
	}

	public void setNewPage(Integer newPage) {
		this.newPage = newPage;
	}

	public List getRows() {
		return rows;
	}
	public void setRows(List rows) {
		this.rows = rows;
	}
	public long getTotal() {
		return total;
	}
	public void setTotal(long total) {
		this.total = total;
	}

	@Override
	public String toString() {
		return "Page [rows=" + rows + ", total=" + total + "]";
	}
}

Query 查询基础类

package com.big.data.lab.entity;

/*
* 类描述：查询基础类  查询 实体类 可继承
* @auther wangmx
* @create 2017/8/11 0011 
*/
public class Query {

    /** 要排序的字段名 */
    protected String sort;
    /** 排序方式: desc \ asc */
    protected String order = "";
    /** 获取一页行数 */
    protected int limit;
    /** 获取的页码 */
    protected int page;
    /** 起始记录 */
    protected int offset;

    public String getSort() {
        return sort;
    }

    public void setSort(String sort) {
        if(sort==null){
            return ;
        }
        String orderSort = "";
        for( int i = 0 ; i<sort.length(); i++ ){
            char a = sort.charAt(i);
            String b = ""+a;
            if( a>64 && a<91 ){ //大写字母的ASCLL码取值范围
                if(orderSort.equals("")){
                    orderSort = orderSort + b.toLowerCase();
                }else{
                    orderSort = orderSort + "_" + b.toLowerCase();
                }
            }else{
                orderSort = orderSort + b;
            }
        }
        this.sort = orderSort;
    }


    public String getOrder() {
        return order;
    }

    public void setOrder(String order) {
        this.order = order;
    }

    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        this.limit = limit;
    }

    public int getPage() {
        return page;
    }

    public void setPage(int page) {
        this.page = page;
    }

    public int getOffset() {
        return (this.page-1)*limit;
    }

    public void setOffset(int offset) {
        this.offset = offset;
    }
}

QueryPersonalCenter 实体类

package com.big.data.lab.entity;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;

import com.fasterxml.jackson.annotation.JsonFormat;
/**
 * 用来分页查询的 实体
 * @author wangmx
 *
 */

public class QueryPersonalCenter extends Query{
	
	private String id;
	private String userId;
	private String heahPhoto;
	private String articleId;
	
	@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone="GMT+8")
	private Date collectTime;
	private String stringDateTime;
	private Integer state;
	
	private Content content;//展示 右边 我的收藏 的文章对象
	private String articleTitle;//用于 搜索 文章的 title 查询时候使用
	
	private String valueParent;//查询  我的收藏  左边 展示框 一级树
	private String valueChild;//查询  我的收藏  左边 展示框  二级树
	private String articTitle;//查询  我的收藏  左边 展示框 文章的名字
	
	
	public String getStringDateTime(){
		String dateStr = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(collectTime);
		return dateStr;
	}
	
	
	public String getArticleId() {
		return articleId;
	}

	public void setArticleId(String articleId) {
		this.articleId = articleId;
	}



	public String getArticTitle() {
		return articTitle;
	}

	public void setArticTitle(String articTitle) {
		this.articTitle = articTitle;
	}

	public String getValueParent() {
		return valueParent;
	}

	public void setValueParent(String valueParent) {
		this.valueParent = valueParent;
	}

	public String getValueChild() {
		return valueChild;
	}

	public void setValueChild(String valueChild) {
		this.valueChild = valueChild;
	}

	public String getArticleTitle() {
		return articleTitle;
	}

	public void setArticleTitle(String articleTitle) {
		this.articleTitle = articleTitle;
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getUserId() {
		return userId;
	}

	public void setUserId(String userId) {
		this.userId = userId;
	}

	public String getHeahPhoto() {
		return heahPhoto;
	}

	public void setHeahPhoto(String heahPhoto) {
		this.heahPhoto = heahPhoto;
	}

	

	public Date getCollectTime() {
		
		return collectTime;
	}

	public void setCollectTime(Date collectTime) {
		this.collectTime = collectTime;
	}

	public Integer getState() {
		return state;
	}

	public void setState(Integer state) {
		this.state = state;
	}

	public Content getContent() {
		return content;
	}

	public void setContent(Content content) {
		this.content = content;
	}

@InitBinder 
	public void initBinder(WebDataBinder binder) { 
		DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd"); 
		dateFormat.setLenient(true); 
		binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true)); 
	}
	
}

dao

	// t 按照 自己的 实体进行更改
    /**
	 * 分页查询
	 * @param queryModel 查询条件
	 *  */
	public List<T> findByPage(Q queryModel);
	
	/**
	 * 统计
	 * @param queryModel 查询条件
	 * @return int
	 * */
	public int count(Q queryModel);

mapper

<resultMap type="com.base.entity.PersonalCenter" id="FunctionMap">
		<id property="funId" column="FUN_ID"/>
		<result property="funCode" column="FUN_CODE"/>
		<result property="funName" column="FUN_NAME"/>
		<result property="menuId" column="MENU_ID"/>
		<result property="orderNo" column="ORDER_NO"/>
		<result property="updateDate" column="UPDATE_DATE"/>
</resultMap>


<!--分页查询-->
	<select id="findByPage" parameterType="com.base.entity.QueryPersonalCenter" resultMap="FunctionMap">
		SELECT FUN_ID,FUN_CODE,FUN_NAME,MENU_ID,ORDER_NO,UPDATE_DATE FROM t_function
		WHERE 1=1
		 <if test="funCode!=null and funCode!='' "  >
			AND FUN_CODE = #{funCode}
		</if>
		<if test="funName!=null and funName!='' "  >
			AND FUN_NAME = #{funName}
		</if>
		<if test="menuId!=null and menuId!='' "  >
			AND MENU_ID = #{menuId}
		</if>
		<if test="orderNo!=null and orderNo!='' "  >
			AND ORDER_NO = #{orderNo}
		</if>
		<if test="updateDate!=null and updateDate!='' "  >
			AND UPDATE_DATE = #{updateDate}
		</if>
		 <if test="sort!= null">
		order by ${sort} ${order} <!--     sort  排序条件    order 排序 DESC 顺序还是 倒叙       -->
		</if> 
		limit #{offset},#{limit}
	</select>
	
	<!--统计-->
	<select id="count" parameterType="com.base.entity.QueryPersonalCenter" resultType="int">
		 SELECT count(*) FROM t_function
		WHERE 1=1
		 <if test="funCode!=null and funCode!='' "  >
			AND FUN_CODE = #{funCode}
		</if>
		<if test="funName!=null and funName!='' "  >
			AND FUN_NAME = #{funName}
		</if>
		<if test="menuId!=null and menuId!='' "  >
			AND MENU_ID = #{menuId}
		</if>
		<if test="orderNo!=null and orderNo!='' "  >
			AND ORDER_NO = #{orderNo}
		</if>
		<if test="updateDate!=null and updateDate!='' "  >
			AND UPDATE_DATE = #{updateDate}
		</if>
	</select>

service

/**
	 * 分页查询
	 * @param queryModel 查询条件
	 *  */
	public Page findByPage(Q queryModel){
		List<T> list =  getDao().findByPage(queryModel);
		int count = getDao().count(queryModel);
		return new Page(list, count);
	}

controller

方法一：

    /**
	 * 案例二 
	 * 分页查询  
	 * @param entity
	 * @return
	 */
	@RequestMapping(value="/page")//queryPersonalCenterContent 改成 page   qpcc
	public String queryPersonalCenterContent(Model model,QueryPersonalCenter entity){//初始 时候展示
		
		try {
			User user1 = UserInfoUtil.getUser();//获取 登录用户的信息
			if (entity.getPage() == 0) {
				entity.setPage(1);
			}
			entity.setLimit(10);//给 默认的 行数 10行
			Page page = service.queryPersonalCenterContent(entity);//total 页数 rows 行数
			
			Long a = page.getTotal() / 10;
			if (page.getTotal() % 10 > 0) {
				a = a + 1;
			}
			page.setAllPage(a);// 获取 总页码数
			page.setNewPage(entity.getPage());//获取当前页数
			model.addAttribute("page", page);
		} catch (Exception e) {
			return "forward:/grzx/queryUser";
		}
		return "forward:/grzx/queryUser";
	}

方法二：

/**
	 * 案例 一
	 * 功能描述：获取分页的数据   根据 自己 需要自己进行 编写
	 * @param entity
	 * @return
	 */
	@RequestMapping(value = "/list",method = RequestMethod.POST)
	public Map<String,Object> list(@RequestBody Q entity){
		Map<String,Object> result = new HashMap<String, Object>();
		try{
			Page page = getService().findByPage(entity);
			result.put("totalCount",page.getTotal());
			result.put("result",page.getRows());
			
		}catch(Exception e){
			e.printStackTrace();
		}
		return result;
	}