Java-Class-C：com.github.pagehelper.PageHelper.java

ylbtech-Java-Class-C：com.github.pagehelper.PageHelper.java
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1.1、

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;

1.2.1、List集合
    /**
     * showdoc
     *
     * @catalog 管理平台
     * @title 在学列表
     * @description 在学列表
     * @method post
     * @url ip:port/order/orderList
     * @return_param pno            必选 num 分页页码
     * @return_param psize          必选 num 分页大小
     * @return_param organizationID 必选 string 机构id
     * @return {"code":200,"data":{"endRow":5,"hasNextPage":false,"hasPreviousPage":false,"isFirstPage":true,"isLastPage":true,"list":[{"buyTime":"2019-02-19 17:47:09","channel":4,"comment":"test","courseID":"b180117000001","leaveMsg":"test","mobile":"13800000000","orderID":"o190219174710","organizationID":"ylbtech","params":{},"payState":0,"pno":1,"price":0,"psize":10,"studentID":"test"},{"buyTime":"2019-02-19 17:45:47","channel":4,"comment":"test","courseID":"b180117000001","leaveMsg":"test","mobile":"13800000000","orderID":"o190219174547","organizationID":"ylbtech","params":{},"payState":0,"pno":1,"price":0,"psize":10,"studentID":"test"},{"buyTime":"2019-02-19 17:45:47","channel":4,"comment":"test","courseID":"b180117000001","leaveMsg":"test","mobile":"13800000000","orderID":"o190219174548","organizationID":"ylbtech","params":{},"payState":0,"pno":1,"price":0,"psize":10,"studentID":"test"},{"buyTime":"2019-02-19 17:45:42","channel":4,"comment":"test","courseID":"b180117000001","leaveMsg":"test","mobile":"13800000000","orderID":"o190219174542","organizationID":"ylbtech","params":{},"payState":0,"pno":1,"price":0,"psize":10,"studentID":"test"},{"buyTime":"2019-02-19 17:01:04","channel":4,"comment":"test","courseID":"b180117000001","leaveMsg":"test","mobile":"13800000000","orderID":"o190219170104","organizationID":"ylbtech","params":{},"payState":0,"pno":1,"price":0,"psize":10,"studentID":"test"}],"navigateFirstPage":1,"navigateLastPage":1,"navigatePages":8,"navigatepageNums":[1],"nextPage":0,"pageNum":1,"pageSize":10,"pages":1,"prePage":0,"size":5,"startRow":1,"total":5}}
     * @return_param courseID  string 课程id
     * @return_param buyTime string 购买时间
     * @return_param channel string 支付渠道（1-商户支付宝；2-商户微信；3-个人支付宝；4个人微信）
     * @return_param comment string  备注
     * @return_param courseID string 课程id
     * @return_param leaveMsg string 留言
     * @return_param mobile string 联系电话
     * @return_param orderID string 订单id
     * @return_param organizationID string
     * @return_param payState string 支付状态0-待支付; 1-已支付;-1-退款
     * @return_param price string 价格
     * @remark 这里是备注信息
     * @number 1
     */
    @ApiOperation(value = "在学列表")
    @PostMapping("/studentOrderList")
    public Result studentOrderList(HttpServletRequest request, @RequestBody(required = false) StudentOrder studentOrder) {
        try {

            /**
             * 查询 支付状态 为 1 支付完成， 2 进行中 两种状态 数据
             */
            PageHelper.startPage(studentOrder.getPno(), studentOrder.getPsize());
            List list = studentOrderService.selectStudentOrderList1(studentOrder);
            PageInfo<Course> pageInfo = PageInfo.of(list);
            return ResultGenerator.genOkResult(pageInfo);
        } catch (Exception e) {
            log.error("查询课程列表异常", e);
            return ResultGenerator.genFailedResult(500, "系统异常");
        }

    }

1.2.2、List<Map>集合

 @ApiOperation(value = "查询拼团情况列表")
    @PostMapping("/selectGroupSituationListById")
    public Result selectGroupSituationListById(HttpServletRequest request, @RequestBody() Map pa) {
        try {
            String organizationId = TokenUtils.getOrganizationId(request, jwtUtil);

            int pno = (int) pa.get("pno");
            int psize = (int) pa.get("psize");
            PageHelper.startPage(pno, psize);
            pa.put("organizationId",organizationId);
            List<Map> list = grouactivityMapper.selectGroupSituationListById(pa);
            PageInfo<Map> pageInfo = PageInfo.of(list);
            return ResultGenerator.genOkResult(pageInfo);
        } catch (Exception e) {
            log.error("列表异常", e);
            return ResultGenerator.genFailedResult(500, "系统异常");
        }
    }
1.3、
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4.返回顶部
1、
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2017 abel533@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.github.pagehelper;

import com.github.pagehelper.dialect.AbstractHelperDialect;
import com.github.pagehelper.page.PageAutoDialect;
import com.github.pagehelper.page.PageMethod;
import com.github.pagehelper.page.PageParams;
import com.github.pagehelper.parser.CountSqlParser;
import com.github.pagehelper.util.MSUtils;
import com.github.pagehelper.util.StringUtil;
import org.apache.ibatis.cache.CacheKey;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.session.RowBounds;

import java.util.List;
import java.util.Properties;

/**
 * Mybatis - 通用分页拦截器<br/>
 * 项目地址 : http://git.oschina.net/free/Mybatis_PageHelper
 *
 * @author liuzh/abel533/isea533
 * @version 5.0.0
 */
public class PageHelper extends PageMethod implements Dialect {
    private PageParams pageParams;
    private PageAutoDialect autoDialect;

    @Override
    public boolean skip(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
        if (ms.getId().endsWith(MSUtils.COUNT)) {
            throw new RuntimeException("在系统中发现了多个分页插件，请检查系统配置!");
        }
        Page page = pageParams.getPage(parameterObject, rowBounds);
        if (page == null) {
            return true;
        } else {
            //设置默认的 count 列
            if (StringUtil.isEmpty(page.getCountColumn())) {
                page.setCountColumn(pageParams.getCountColumn());
            }
            autoDialect.initDelegateDialect(ms);
            return false;
        }
    }

    @Override
    public boolean beforeCount(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
        return autoDialect.getDelegate().beforeCount(ms, parameterObject, rowBounds);
    }

    @Override
    public String getCountSql(MappedStatement ms, BoundSql boundSql, Object parameterObject, RowBounds rowBounds, CacheKey countKey) {
        return autoDialect.getDelegate().getCountSql(ms, boundSql, parameterObject, rowBounds, countKey);
    }

    @Override
    public boolean afterCount(long count, Object parameterObject, RowBounds rowBounds) {
        return autoDialect.getDelegate().afterCount(count, parameterObject, rowBounds);
    }

    @Override
    public Object processParameterObject(MappedStatement ms, Object parameterObject, BoundSql boundSql, CacheKey pageKey) {
        return autoDialect.getDelegate().processParameterObject(ms, parameterObject, boundSql, pageKey);
    }

    @Override
    public boolean beforePage(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
        return autoDialect.getDelegate().beforePage(ms, parameterObject, rowBounds);
    }

    @Override
    public String getPageSql(MappedStatement ms, BoundSql boundSql, Object parameterObject, RowBounds rowBounds, CacheKey pageKey) {
        return autoDialect.getDelegate().getPageSql(ms, boundSql, parameterObject, rowBounds, pageKey);
    }

    public String getPageSql(String sql, Page page, RowBounds rowBounds, CacheKey pageKey) {
        return autoDialect.getDelegate().getPageSql(sql, page, pageKey);
    }

    @Override
    public Object afterPage(List pageList, Object parameterObject, RowBounds rowBounds) {
        //这个方法即使不分页也会被执行，所以要判断 null
        AbstractHelperDialect delegate = autoDialect.getDelegate();
        if (delegate != null) {
            return delegate.afterPage(pageList, parameterObject, rowBounds);
        }
        return pageList;
    }

    @Override
    public void afterAll() {
        //这个方法即使不分页也会被执行，所以要判断 null
        AbstractHelperDialect delegate = autoDialect.getDelegate();
        if (delegate != null) {
            delegate.afterAll();
            autoDialect.clearDelegate();
        }
        clearPage();
    }

    @Override
    public void setProperties(Properties properties) {
        setStaticProperties(properties);
        pageParams = new PageParams();
        autoDialect = new PageAutoDialect();
        pageParams.setProperties(properties);
        autoDialect.setProperties(properties);
        //20180902新增 aggregateFunctions, 允许手动添加聚合函数（影响行数）
        CountSqlParser.addAggregateFunctions(properties.getProperty("aggregateFunctions"));
    }
}
2、
5.返回顶部
1.1、Class.java
package com.ylbtech.edu.pclass.domain;

import com.ylbtech.common.base.BaseEntity;

/**
 * class表 class
 * 
 * @author ylbtech
 * @date 2019-02-22
 */
public class Class extends BaseEntity
{
    
}
View Code
1.2、BaseEntity.java
package com.ylbtech.common.base;

import java.io.Serializable;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonFormat;

/**
 * Entity基类
 * 
 * @author ylbtech
 */
public class BaseEntity implements Serializable
{
    private static final long serialVersionUID = 1L;

    /** 搜索值 */
    private String searchValue;

    /** 创建者 */
    private String createBy;

    /** 创建时间 */
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date createTime;

    /** 更新者 */
    private String updateBy;

    /** 更新时间 */
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date updateTime;

    /** 备注 */
    private String remark;
    /**
     * 分页 页码
     */
    private int pno =1;
    /**
     * 分页 大小
     */
    private int psize =10;

    /** 请求参数 */
    private Map<String, Object> params;

    public String getSearchValue()
    {
        return searchValue;
    }

    public void setSearchValue(String searchValue)
    {
        this.searchValue = searchValue;
    }

    public String getCreateBy()
    {
        return createBy;
    }

    public void setCreateBy(String createBy)
    {
        this.createBy = createBy;
    }

    public Date getCreateTime()
    {
        return createTime;
    }

    public void setCreateTime(Date createTime)
    {
        this.createTime = createTime;
    }

    public String getUpdateBy()
    {
        return updateBy;
    }

    public void setUpdateBy(String updateBy)
    {
        this.updateBy = updateBy;
    }

    public Date getUpdateTime()
    {
        return updateTime;
    }

    public void setUpdateTime(Date updateTime)
    {
        this.updateTime = updateTime;
    }

    public String getRemark()
    {
        return remark;
    }

    public void setRemark(String remark)
    {
        this.remark = remark;
    }

    public Map<String, Object> getParams()
    {
        if (params == null)
        {
            params = new HashMap<>();
        }
        return params;
    }

    public int getPno() {
        return pno;
    }

    public void setPno(int pno) {
        this.pno = pno;
    }

    public int getPsize() {
        return psize;
    }

    public void setPsize(int psize) {
        this.psize = psize;
    }

    public void setParams(Map<String, Object> params)
    {
        this.params = params;
    }
}
BaseEntity.java
1.3、
 
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warn 作者：ylbtech
出处：http://ylbtech.cnblogs.com/
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原文地址：https://www.cnblogs.com/storebook/p/11103221.html