MyBatis-Plus多表联合查询并且分页(3表联合)

时间：2021-05-20

这3张表的关系是模型表Model ===> 训练表Training ===》应用表Application（大概的逻辑是：选择应用，然后训练，然后成为模型）

首先我们先建立实体Model（我使用的data注解不需要get set @TableField(exist = false) 注解下的属性是相关联表的属性）

package cn.com.befery.dataai.po;import java.util.Date;import org.springframework.boot.jackson.JsonComponent;import com.baomidou.mybatisplus.annotations.TableField;import com.baomidou.mybatisplus.annotations.TableId;import com.baomidou.mybatisplus.annotations.TableName;import com.baomidou.mybatisplus.enums.IdType;import lombok.Data;@JsonComponent()@Data@TableName("ai_model")public class Model { @TableId(value = "model_id", type = IdType.AUTO) private Long modelID; private Long applicationId; private Long trainingId; private String modelName; // 描述 private String modelDescribe; private String modelType; private Date createDate; private String filePath; private String fileName; private String daimension; //维度 private Long status; @TableField(exist = false) private String applicationName; @TableField(exist = false) private String trainingName; @TableField(exist = false) private String order; @TableField(exist = false) private String orderdir; // 升序或降序}

然后是第二个相关联的表应用表application表

package cn.com.befery.dataai.po;import java.io.Serializable;import java.util.Date;import com.baomidou.mybatisplus.annotations.TableField;import com.baomidou.mybatisplus.annotations.TableId;import com.baomidou.mybatisplus.annotations.TableName;import com.baomidou.mybatisplus.enums.IdType;import lombok.Data;@Data@TableName("ai_application")public class Application implements Serializable{ private static final long serialVersionUID = 1L; @TableId(value="application_id",type=IdType.AUTO) private Long applicationID; private String applicationName; private String filePath; private String fileName; private Long userId; private Date createDate; private Integer status; private String dimension; //维度 @TableField(exist= false) private String userName; //关联用户表的名称字段 @TableField(exist = false) private String order; @TableField(exist = false) private String modelName; @TableField(exist = false) private String trainingName; @TableField(exist = false) private String orderdir; //升序或降序}

然后是相关联的第3张表训练表traning

package cn.com.befery.dataai.po;import java.io.Serializable;import java.util.Date;import com.baomidou.mybatisplus.annotations.TableField;import com.baomidou.mybatisplus.annotations.TableId;import com.baomidou.mybatisplus.annotations.TableName;import com.baomidou.mybatisplus.enums.IdType;import lombok.Data;@Data@TableName("ai_training")public class Training implements Serializable { private static final long serialVersionUID = 1L; @TableId(value = "training_id", type = IdType.AUTO) private Long trainingID; private Long serverId; //服务器ID private Long applicationId; //应用ID private String trainingModel; //训练模型 private String trainingName; //训练名称 private String dimensionInput; //输入维度 private String dimensionOutput; //输出维度 private Date createDate; private Integer status; @TableField(exist = false) private String applicationName; @TableField(exist = false) private String serverName; @TableField(exist = false) private String modelName; @TableField(exist = false) private String order; //排序字段 @TableField(exist = false) private String orderdir; //升序或降序}

然后是DAO层：

package cn.com.befery.dataai.dao;import java.util.List;import org.apache.ibatis.annotations.Param;import com.baomidou.mybatisplus.mapper.BaseMapper;import com.baomidou.mybatisplus.plugins.pagination.Pagination;import cn.com.befery.dataai.po.Model;public interface ModelDao extends BaseMapper<Model> { List<Model> selectModelPage(Pagination page,@Param(value = "model") Model model);}

然后是xml（sql语句使用了别名，别名和实体中的一致，包括之后的前后台交互，都取一致的名字，规范避免出错）【我之所以使用 $ 符号是因为如果使用#号他会当作字符串识别，他不会当作关键字识别，我使用#号不行】

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="cn.com.befery.dataai.dao.ModelDao"> <select id="selectModelPage" resultType="cn.com.befery.dataai.po.Model"> SELECT model.`model_id`, model.`model_name` as modelName, model.`status`as status, t.`training_name`as trainingName, ap.`application_name` as applicationName, model.`create_date` as createDate FROM ai_model model LEFT JOIN ai_training t ON t.`training_id` = model.`training_id` LEFT JOIN ai_application ap ON ap.`application_id` = t.`application_id` <where> 1 = 1 <if test="model.modelName != null and model.modelName != ''"> and model.`model_name` like '%${model.modelName}%' </if> order by ${model.order} ${model.orderdir} </where> </select></mapper>

然后就是service：

package cn.com.befery.dataai.service;import javax.servlet.http.HttpServletRequest;import org.springframework.web.multipart.MultipartFile;import com.baomidou.mybatisplus.plugins.Page;import com.baomidou.mybatisplus.service.IService;import cn.com.befery.dataai.po.Model;import cn.com.befery.dataai.vo.ResultCode;public interface ModelService extends IService<Model>{ //分页 Page<Model> selectModelPage(int pageNo,int pageSize,Model model); }

然后就是serviceImpl：（此处将接口中的 pageNo和pageSize封装成到分页辅助类 page<T>中）

@Service@Transactionalpublic class ModelServiceImpl extends ServiceImpl<ModelDao, Model> implements ModelService { @Autowired private ModelDao modelDao; @Override public Page<Model> selectModelPage(int pageNo, int pageSize, Model model) { // TODO Auto-generated method stub Page<Model> page = new Page<Model>(pageNo, pageSize); return page.setRecords(this.baseMapper.selectModelPage(page, model)); }}

然后就是Controller：

简单说一下下面的参数：
1.orderNO（排序用的）：是前台传过来的，根据orderNO（类似下标）找到前台定义好的数据库字段
2.order（排序用的）：根据orderNO（类似下标）找到前台定义好的数据库字段
3.orderdir（排序用的：是asc 还是desc）
4.search（前台模糊查询使用的）：前台传的名字，来进行模糊查询

/** * @author zhangxuewei 三表查询 * @param param * @param request * @return */ @ResponseBody @RequestMapping(value = "/modelPage") public ResponseData modlePage(SearchParam param, HttpServletRequest request) { logger.info("modlePage ..........."); String orderNO = request.getParameter("order[0][column]"); String order = request.getParameter("columns[" + orderNO + "][name]"); String orderdir = request.getParameter("order[0][dir]"); String search = request.getParameter("search[value]"); int pageNo = param.getStart() / param.getLength() + 1; int pageSize = param.getLength(); Model model = new Model(); model.setModelName(search); model.setOrder(order); model.setOrderdir("asc".equals(orderdir) ? "asc" : "desc"); Page<Model> pageDate = modelService.selectModelPage(pageNo, pageSize, model); return responseData(param.getDraw(), pageDate); }

这个是分页返回公共类

package cn.com.befery.dataai.controller;import org.springframework.stereotype.Controller;import com.baomidou.mybatisplus.plugins.Page;import cn.com.befery.dataai.vo.ResponseData;@Controllerpublic class BaseController { /** * * @param draw 重构次数 * @param page 分页数据 * @return */ public ResponseData responseData(String draw,Page<?> page){ ResponseData res = new ResponseData(); res.setData(page.getRecords()); res.setDraw(draw); res.setRecordsFiltered((int)page.getTotal()); res.setRecordsTotal((int)page.getTotal()); return res; }}

这个是ResponseDate实体类

package cn.com.befery.dataai.vo;import java.util.List;//@JsonInclude(Include.NON_NULL) public class ResponseData { /** * */// private static final long serialVersionUID = 1L; private String draw; private int recordsTotal; private int recordsFiltered; @SuppressWarnings("rawtypes") private List data;}

这是前端的html

<!DOCTYPE HTML><html><head><meta charset="utf-8"><meta name="renderer" content="webkit|ie-comp|ie-stand"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" /><meta http-equiv="Cache-Control" content="no-siteapp" /><link rel="stylesheet" type="text/css" href="../static/h-ui/css/H-ui.min.css" rel="external nofollow" /><link rel="stylesheet" type="text/css" href="../static/h-ui/css/H-ui.admin.css" rel="external nofollow" /><link rel="stylesheet" type="text/css" href="../static/libs/Hui-iconfont/1.0.7/iconfont.css" rel="external nofollow" /><link rel="stylesheet" type="text/css" href="../static/libs/icheck/icheck.css" rel="external nofollow" /><link rel="stylesheet" type="text/css" href="../static/h-ui/skin/default/skin.css" rel="external nofollow" id="skin" /><link rel="stylesheet" type="text/css" href="../static/h-ui/css/style.css" rel="external nofollow" /><title>应用列表</title><style type="text/css">.dataTables_wrapper .dataTables_length { float: left; padding-bottom: 0px; padding-top: 10px; padding-left: 20px;}.table tbody tr td:FIRST-CHILD { text-align: center;}.table tbody tr td { text-align: center;}.dataTables_wrapper .dataTables_filter { padding-bottom: 10px;}.mt-20 { margin-top: 10px;}.page-container { padding: 20px; padding-top: 0px;}.form-horizontal .form-label { text-align: left; width: 140px; padding-right: 0px;}</style></head><body> <nav class="breadcrumb"> <i class="Hui-iconfont"></i> 首页 <span class="c-gray en">></span> 模型和测试管理 <span class="c-gray en">></span> 模型列表 <a class="btn btn-success radius r" id="refresh" style="line-height: 1.6em; margin-top: 3px" href="javascript:location.replace(location.href);" rel="external nofollow" title="刷新"><i class="Hui-iconfont"></i></a> </nav> <div class="page-container">   <div style="display: <#if (model)??>${model}<#else></#if>" class="cl pd-5 bg-1 bk-gray mt-20"> <span class="l"> <a class="btn btn-primary radius" id="addApp" onclick="model_testing('测试模型','/pages/model-testing.html')" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><i class="Hui-iconfont"></i> 测试模型</a><a id="datarefresh" onclick="data_refresh()"></a><input id="hiddentext" type="text" hidden="true" /> <input id="msgsecret" type="text" hidden="true" /></div> <div class="mt-20"> <table class="table table-border table-bordered table-bg table-hover table-sort " width=100%> <thead> <tr class="text-c">  <th width="80">序号</th> <th width="80">模型服务名称</th> <th width="100">训练名称</th> <th width="100">应用名称</th> <th width="100">创建时间</th> <th width="80">操作</th> </tr> </thead> <tbody> </tbody> </table> </div> </div> <div id="ajaxModal" class="modal hide fade" tabindex="-1"> <article class="page-container"> <form action="" method="post" class="form form-horizontal" id="form-modelServer-add"> <div class="row cl"> <label class="form-label col-xs-3 col-sm-3"><span class="c-red">*</span>App名称：</label> <div class="formControls col-xs-8 col-sm-9"> <input type="text" class="input-text" value="" placeholder="" id="appName" name="appName"> </div> </div> <div class="row cl"> <label class="form-label col-xs-3 col-sm-3"><span class="c-red">*</span>图片地址：</label> <div class="formControls col-xs-8 col-sm-9"> <input type="text" class="input-text" value="" placeholder="" id="adminMobile" name="adminMobile"> </div> </div> <div class="row cl"> <label class="form-label col-xs-3 col-sm-3"><span class="c-red">*</span>Domain(SaaS)：</label> <div class="formControls col-xs-8 col-sm-9"> <input type="text" class="input-text" value="" placeholder="" id="payCallBackURL" name="payCallBackURL"> </div> </div> <div class="row cl"> <div class="col-xs-8 col-sm-9 col-xs-offset-4 col-sm-offset-3" style="margin-left: 130px; width: 100px;"> <button class="btn btn-primary radius" value="">  提交  </button> </div>  </div> </form> </article> </div> <script type="text/javascript" src="../static/libs/jquery/1.9.1/jquery.min.js"></script> <script type="text/javascript" src="../static/libs/layer/2.1/layer.js"></script> <script type="text/javascript" src="../static/libs/My97DatePicker/WdatePicker.js"></script> <script type="text/javascript" src="../static/libs/datatables/1.10.0/jquery.dataTables.min.js"></script> <script type="text/javascript" src="../static/h-ui/js/H-ui.js"></script> <script type="text/javascript" src="../static/h-ui/js/H-ui.admin.js"></script>  <script type="text/javascript"> var table = $('.table-sort') .DataTable( { "processing" : true, "serverSide" : true, // "searching":true, 'language' : { "search" : "按名称检索：", "sProcessing" : "<div style='position:absolute;margin-left:42%;margin-top:15%'><img src='static/h-ui/images/loading_072.gif'/>数据加载中...</div>", }, "sDom" : '<"top"f<"clear">>rt<"bottom"ilp><"clear">', "order" : [ [ 0, "asc" ] ], "ajax" : { "url" : "/model/modelPage", }, "columnDefs" : [ { orderable : false,//禁用排序 targets : [ 4 ] } ], "columns" : [ { "data" : "modelID", "name" : "model_id", "class" : "modelID" }, { "data" : "modelName", "name" : "model_name", "class" : "modelName" }, { "data" : "trainingName", "name" : "training_name", "class" : "trainingName" }, { "data" : "applicationName", "name" : "application_name", "class" : "applicationName" }, { "data" : function(e) { if (e.createDate != null && e.createDate != "null") { return e.createDate; } return ""; }, "name" : "create_date", "class" : "createDate" }, { "data" : function(e) { if (e.status == '0') { if (e.isTrained == '0') { return '<a style="display: <#if (modelServer_delete)??>${modelServer_delete}<#else></#if>" title="删除" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick=modelServer_del(this,"' + e.modelID + '") class="ml-5" style="text-decoration:none"><i class="Hui-iconfont"></i></a>'; } else { return '<a style="display: <#if (modelServer_delete)??>${modelServer_delete}<#else></#if>" title="删除" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick=modelServer_del(this,"' + e.modelID + '") class="ml-5" style="text-decoration:none"><i class="Hui-iconfont"></i></a>'; } } else { if (e.isTrained == '0') { return '<a style="display: <#if (modelServer_delete)??>${modelServer_delete}<#else></#if>" title="删除" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick=modelServer_del(this,"' + e.modelID + '") class="ml-5" style="text-decoration:none"><i class="Hui-iconfont"></i></a>'; } else { return '<a style="display: <#if (modelServer_delete)??>${modelServer_delete}<#else></#if>" title="删除" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick=modelServer_del(this,"' + e.modelID + '") class="ml-5" style="text-decoration:none"><i class="Hui-iconfont"></i></a>'; } } }, "class" : "td-manage" } ], }); table.on('draw.dt', function() { }); $('.table-sort tbody').on('click', 'tr', function() { if ($(this).hasClass('selected')) { $(this).removeClass('selected'); } else { table.$('tr.selected').removeClass('selected'); $(this).addClass('selected'); } }); //}); function refreshRow() { } function initComplete(data) { //选择时间后触发重新加载的方法 $("#logmin").on('apply.input-text', function() { //当选择时间后，出发dt的重新加载数据的方法 table.ajax.reload(); //获取dt请求参数 var args = table.ajax.params(); console.log("额外传到后台的参数值extra_search为：" + args.extra_search); }); } function filterGlobal() { alert($('#search').val()); $('.table-sort').DataTable().search($('#search').val()).draw(); } function search() { table.ajax.reload(); //获取dt请求参数 var args = table.ajax.params(); console.log("额外传到后台的参数值extra_search为：" + args.extra_search); // filterGlobal(); } function modelServerServer_add(title, url) { layer_show(title, url, 550, 300); } function data_refresh() { var text = $('#hiddentext').val(); if (text == 'add') { layer.alert($('#msgsecret').val()); } if (text == 'update') { layer.msg('更新成功!', { icon : 6, time : 1000 }); } table.ajax.reload(); } function modelServer_del(obj, id) { layer.confirm('确认要删除吗？', function(index) { //此处请求后台程序，下方是成功后的前台处理…… if (index) { $.ajax({ type : 'POST', url : '/model/deleteModel', data : { modelID : id, }, success : function(result) { if (result.code == "0") { $(obj).parents("tr").remove(); layer.msg('已删除!', { icon : 1, time : 1000 }); } else { layer.msg('删除失败!', { icon : 5, time : 1000 }); } }, error : function(jqXHR, textStatus, errorThrown) { layer.msg(errorThrown, { icon : 5, time : 1000 }); } }); } else { alert(33) } }); } function reset_secret(obj, id) { layer.confirm('确认要重置Secret吗？', function(index) { //此处请求后台程序，下方是成功后的前台处理…… if (index) { $.ajax({ type : 'POST', url : 'modelServer/resetSecret', data : { appID : id, }, success : function(result) { if (result.code == "0") { layer.alert('Secret is: ' + result.msg); } else { layer.alert('重置失败！'); } }, error : function(jqXHR, textStatus, errorThrown) { layer.msg(errorThrown, { icon : 5, time : 1000 }); } }); } else { alert(33) } }); } function modelServer_edit(obj, id) { var modelServerID = $(obj).parents("tr").find(".modelServerID").text(); var appName = $(obj).parents("tr").find(".appName").text(); var imageLibId = $(obj).parents("tr").find(".imageLibId").val(); var domainId = $(obj).parents("tr").find(".domainId").val(); var url = "pages/modelServer-update.html?appName=" + appName + "&imageLibId=" + imageLibId + "&modelServerID=" + id + "&domainId=" + domainId; layer_show("修改App", encodeURI(url), 550, 350); } function modelServerServer_training(obj, id) { window.location.href = "pages/modelServer-train.html?appID=" + id; } function model_testing(title,url){ layer_show(title,url,550,300); } </script></body></html>

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