diff --git a/ebts-ui/src/api/tool/top.js b/ebts-ui/src/api/tool/top.js
index 7561bd8..037ab59 100644
--- a/ebts-ui/src/api/tool/top.js
+++ b/ebts-ui/src/api/tool/top.js
@@ -29,3 +29,12 @@ export function updateQuery(data) {
     data:data
   })
 }
+
+// 查询万能查询详细
+export function preview(data) {
+  return request({
+    url: '/top/preview',
+    method: 'post',
+    data:data
+  })
+}
diff --git a/ebts-ui/src/views/tool/top/packages/elements/button.vue b/ebts-ui/src/views/tool/top/packages/elements/button.vue
index 52d48c6..891e7e3 100644
--- a/ebts-ui/src/views/tool/top/packages/elements/button.vue
+++ b/ebts-ui/src/views/tool/top/packages/elements/button.vue
@@ -1,11 +1,11 @@
 <template>
   <button
-    class="cc-button"
+    class="top-button"
     @click="handleClick"
     :disabled="buttonDisabled"
     :class="[
-      type ? 'cc-button--' + type : '',
-      buttonSize ? 'cc-button--' + buttonSize : '',
+      type ? 'top-button--' + type : '',
+      buttonSize ? 'top-button--' + buttonSize : '',
       {
         'is-disabled': buttonDisabled,
         'is-plain': plain
@@ -18,7 +18,7 @@
 
 <script>
 export default {
-  name: 'CcButton',
+  name: 'TopButton',
   props: {
     type: {
       type: String,
@@ -54,7 +54,7 @@ export default {
 </script>
 
 <style lang="scss" scoped>
-.cc-button {
+.top-button {
   display: inline-block;
   line-height: 1;
   white-space: nowrap;
@@ -76,17 +76,17 @@ export default {
   border-radius: 4px;
 }
 
-.cc-button:focus, .cc-button:hover {
+.top-button:focus, .top-button:hover {
   color: #409eff;
   border-color: #c6e2ff;
   background-color: #ecf5ff;
 }
 
-.cc-button--mini, .cc-button--mini.is-round {
+.top-button--mini, .top-button--mini.is-round {
   padding: 7px 15px;
 }
 
-.cc-button--mini, .cc-button--small {
+.top-button--mini, .top-button--small {
   font-size: 12px;
   border-radius: 3px;
 }
diff --git a/ebts-ui/src/views/tool/top/packages/topology/src/toolbar-edit.vue b/ebts-ui/src/views/tool/top/packages/topology/src/toolbar-edit.vue
index 10eacef..ed0f39e 100644
--- a/ebts-ui/src/views/tool/top/packages/topology/src/toolbar-edit.vue
+++ b/ebts-ui/src/views/tool/top/packages/topology/src/toolbar-edit.vue
@@ -2,12 +2,13 @@
   <div class="toolbar">
     <div class="left">
       <!--<el-checkbox class="edge-enabled" title="连线模式" @change="$parent.enableEdgeHandler"></el-checkbox>-->
-<!--      <cc-dropdown-->
+<!--      <top-dropdown-->
 <!--        class="edge-shape"-->
 <!--        :dropdown-items="$parent.edgeShapeList"-->
 <!--        @change="$parent.changeEdgeShapeHandler"-->
 <!--      >-->
-<!--      </cc-dropdown>-->
+<!--      </top-dropdown>-->
+      <top-button size="mini" @click="$parent.reBack">返回</top-button>
     </div>
     <div class="center">
       <div class="graph-ops">
@@ -31,24 +32,26 @@
         <i class="iconfont icon-roi-select" id="multi-select" title="框选" @click="$parent.multiSelectHandler"></i>
 
 
-        <div v-if="$parent.$data.graphMode === 'edit'" class="iconfont zx"><cc-dropdown
+        <div v-if="$parent.$data.graphMode === 'edit'" class="iconfont zx">
+          <top-dropdown
           class="edge-shape"
           :dropdown-items="$parent.edgeShapeList"
-          @change="$parent.changeEdgeShapeHandler"
-        >
-        </cc-dropdown></div>
+          @change="$parent.changeEdgeShapeHandler">
+          </top-dropdown>
+        </div>
       </div>
     </div>
     <div class="right">
-      <cc-button size="mini" @click="$parent.forceLayoutHandler">自动布局</cc-button>
+      <top-button size="mini" @click="$parent.forceLayoutHandler">自动布局</top-button>
       <!--<el-button size="mini" @click="$parent.circularLayoutHandler">环形布局</el-button>-->
       <!--<el-button size="mini" @click="$parent.radialLayoutHandler">辐射</el-button>-->
       <!--<el-button size="mini" @click="$parent.mdsLayoutHandler">MDS</el-button>-->
       <!--<el-button size="mini" @click="$parent.dagreLayoutHandler">层次</el-button>-->
       <!--<el-button size="mini" @click="$parent.autoLayoutHandler">自动（old）</el-button>-->
-      <!-- todo 返回到预览模式      -->
-      <cc-button size="mini" @click="$parent.changeModeHandler('preview')">返回</cc-button>
-      <cc-button size="mini" @click="$parent.saveDataHandler">保存</cc-button>
+      <el-button size="mini" @click="$parent.searchPreview">预览</el-button>
+      <!-- 返回到预览模式      -->
+<!--      <top-button size="mini" @click="$parent.changeModeHandler('preview')">返回</top-button>-->
+      <top-button size="mini" @click="$parent.saveDataHandler">保存</top-button>
     </div>
   </div>
 </template>
@@ -59,8 +62,8 @@ import { Button, Dropdown } from '../../elements';
 export default {
   name: "ToolbarEdit",
   components: {
-    "cc-button": Button,
-    "cc-dropdown": Dropdown
+    "top-button": Button,
+    "top-dropdown": Dropdown
   }
 };
 </script>
@@ -155,7 +158,7 @@ export default {
     }
   }
 
-  .cc-button {
+  .top-button {
     margin: 0 5px;
   }
 }
diff --git a/ebts-ui/src/views/tool/top/packages/topology/src/topology.vue b/ebts-ui/src/views/tool/top/packages/topology/src/topology.vue
index c21cc1f..b5b2ab6 100644
--- a/ebts-ui/src/views/tool/top/packages/topology/src/topology.vue
+++ b/ebts-ui/src/views/tool/top/packages/topology/src/topology.vue
@@ -881,7 +881,10 @@ export default {
       //
       // this.graph.$C.edge.type = this.currentEdgeShape["guid"];
     },
-
+    // 返回
+    reBack(){
+      this.$router.replace('/tool/er-top')
+    },
     undoHandler() {
       if (this.historyIndex > 0 && this.historyIndex - (this.undoCount + 1) >= 0) {
         this.undoCount += 1
@@ -1410,6 +1413,12 @@ export default {
       this.changeGraphTheme('defaultStyle')
       this.$emit('doChangeMode', graphMode)
     },
+    // todo 预览
+    searchPreview(){
+      let graphData = this.getGraphData()
+      // console.log(graphData)
+      this.$emit('doPreview', graphData)
+    },
     // 保存函数
     saveDataHandler() {
       let graphData = this.getGraphData()
diff --git a/ebts-ui/src/views/tool/top/topology.vue b/ebts-ui/src/views/tool/top/topology.vue
index df90786..df81157 100644
--- a/ebts-ui/src/views/tool/top/topology.vue
+++ b/ebts-ui/src/views/tool/top/topology.vue
@@ -11,8 +11,85 @@
       @doManualRefresh="doManualRefresh"
       @doChangeMode="doChangeMode"
       @doSaveData="doSaveData"
+      @doPreview="doPreview"
     >
     </topology>
+    <el-dialog :title="previewDate.title" width="1400px" :visible.sync="previewDate.open">
+      <el-form ref="ucon" :inline="true" v-show="showSearch" label-width="68px">
+        <el-form-item v-for="item in uconList"
+                      :key="item.id"
+                      :label="item.ucName">
+
+          <el-input v-if="item.type == 1" v-model="item.ucReal"
+                    clearable
+                    :placeholder="outPlaceholder(item)"
+                    size="small"
+                    @keyup.enter.native="handleQuery"
+          />
+          <div style="width: 200px" v-else-if="item.type == 2">
+            <el-row :gutter="15">
+              <el-col :span="12">
+                <el-input size="small" placeholder="开始值" v-model="item.ucReal.begin"></el-input>
+              </el-col>
+              <el-col :span="12">
+                <el-input size="small" placeholder="结束值" v-model="item.ucReal.end"></el-input>
+              </el-col>
+            </el-row>
+          </div>
+          <el-date-picker
+            v-else-if="item.type ==3"
+            v-model="item.ucReal"
+            type="date"
+            format="yyyy-MM-dd"
+            value-format="yyyy-MM-dd"
+            placeholder="选择日期时间">
+          </el-date-picker>
+          <el-date-picker v-else-if="item.type ==4"
+                          v-model="item.ucReal"
+                          size="small"
+                          style="width: 240px"
+                          value-format="yyyy-MM-dd"
+                          type="daterange"
+                          range-separator="-"
+                          start-placeholder="开始日期"
+                          end-placeholder="结束日期"
+          ></el-date-picker>
+        </el-form-item>
+        <el-form-item>
+          <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
+          <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
+        </el-form-item>
+      </el-form>
+      <el-row :gutter="10" class="mb8">
+        <el-col :span="1.5">
+          <el-button
+            type="warning"
+            plain
+            icon="el-icon-download"
+            size="mini"
+            @click="handleExport"
+            v-hasPermi="['tool:query:export']"
+          >导出
+          </el-button>
+        </el-col>
+        <right-toolbar :showSearch.sync="showSearch" @queryTable="handleQuery"></right-toolbar>
+      </el-row>
+      <el-table :data="previewDate.data">
+        <el-table-column v-for="item in previewDate.header"
+                         :label="item"
+                         align="center"
+                         :key="item"
+                         :prop="item"/>
+      </el-table>
+      <pagination
+        v-show="previewDate.total>0"
+        :total="previewDate.total"
+        :page.sync="queryParams.pageNum"
+        :limit.sync="queryParams.pageSize"
+        @pagination="previewQuery"
+      />
+    </el-dialog>
+
   </div>
 </template>
 
@@ -20,7 +97,7 @@
 /* 局部注册 */
 import Topology from './packages/topology/src/topology'
 import { deepClone } from './utils/index'
-import {getQuery,getTables,updateQuery} from '@/api/tool/top'
+import {getQuery,getTables,updateQuery,preview} from '@/api/tool/top'
 
 export default {
   name: 'DemoTopology',
@@ -29,6 +106,18 @@ export default {
   },
   data() {
     return {
+      queryParams: {
+        pageNum: 1,
+        pageSize: 10,
+      },
+      baseData:null,
+      previewDate:{
+        open:false,
+        title:"预览",
+        data:[],
+        header:[],
+        total:0
+      },
       graphData: {
         // "nodes":[{"id":"305bfbdd-31cc-4028-b2b1-2f504968356d","x":304.8223042174235,"y":131.0267312661499,"label":"客户端","table":"test_table","type":"dice-er-box","attrs":[{"key":"id","type":"number(6)","comment":"主键id","isUse":0},{"key":"key","type":"varchar(255)","comment":"关键字","isUse":1},{"key":"gender","type":"enum(M, F)","comment":"gender","isUse":1},{"key":"birthday","type":"date","comment":"生日","isUse":0},{"key":"hometown","type":"varchar(255)","comment":"家乡","isUse":0},{"key":"country","type":"varchar(255)","comment":"国家","isUse":1},{"key":"nation","type":"varchar(255)","comment":"nation","isUse":1},{"key":"jobId","type":"number(3)","comment":"工作id","isUse":1},{"key":"phone","type":"varchar(255)","comment":"电话","isUse":1}],"size":[55,55],"width":250,"height":316,"anchorPoints":[[0.5,0],[1,0.5],[0.5,1],[0,0.5]],"appState":{"alert":false},"labelCfg":{"position":"bottom"},"style":{"default":{"stroke":"#CED4D9","fill":"transparent","shadowBlur":10,"shadowColor":"rgba(13, 26, 38, 0.08)","lineWidth":1,"radius":4,"strokeOpacity":0.7},"selected":{"shadowColor":"#ff240b","shadowBlur":2},"unselected":{"shadowColor":""}},"selectedIndex":null,"appConfig":{},"depth":0},{"id":"be9b52e5-9c2f-4e5c-990a-afbf19dcfeed","x":-94.51187075489108,"y":127.35469287559994,"label":"防火墙","table":"test_table","type":"dice-er-box","attrs":[{"key":"id","type":"number(6)","comment":"主键id","isUse":0},{"key":"key","type":"varchar(255)","comment":"关键字","isUse":1},{"key":"gender","type":"enum(M, F)","comment":"gender","isUse":0},{"key":"birthday","type":"date","comment":"生日","isUse":1},{"key":"hometown","type":"varchar(255)","comment":"家乡","isUse":1},{"key":"country","type":"varchar(255)","comment":"国家","isUse":0},{"key":"nation","type":"varchar(255)","comment":"nation","isUse":1},{"key":"jobId","type":"number(3)","comment":"工作id","isUse":1},{"key":"phone","type":"varchar(255)","comment":"电话","isUse":1}],"size":[55,55],"width":250,"height":316,"anchorPoints":[[0.5,0],[1,0.5],[0.5,1],[0,0.5]],"appState":{"alert":false},"labelCfg":{"position":"bottom"},"style":{"default":{"stroke":"#CED4D9","fill":"transparent","shadowBlur":10,"shadowColor":"rgba(13, 26, 38, 0.08)","lineWidth":1,"radius":4,"strokeOpacity":0.7},"selected":{"shadowColor":"#ff240b","shadowBlur":2},"unselected":{"shadowColor":""}},"selectedIndex":null,"appConfig":{},"startIndex":0,"startX":0,"depth":0}],"edges":[{"id":"8bc0249e-ee5d-4dd7-84e0-e4e32c217f2a","source":"be9b52e5-9c2f-4e5c-990a-afbf19dcfeed","sourceAttrs":[{"key":"id","type":"number(6)","comment":"主键id","isUse":1},{"key":"key","type":"varchar(255)","comment":"关键字","isUse":1},{"key":"gender","type":"enum(M, F)","comment":"gender","isUse":1},{"key":"birthday","type":"date","comment":"生日","isUse":1},{"key":"hometown","type":"varchar(255)","comment":"家乡","isUse":1},{"key":"country","type":"varchar(255)","comment":"国家","isUse":1},{"key":"nation","type":"varchar(255)","comment":"nation","isUse":1},{"key":"jobId","type":"number(3)","comment":"工作id","isUse":1},{"key":"phone","type":"varchar(255)","comment":"电话","isUse":1}],"sourceAnchor":1,"target":"305bfbdd-31cc-4028-b2b1-2f504968356d","type":"top-cubic","style":{"active":{"stroke":"rgb(95, 149, 255)","lineWidth":1},"selected":{"stroke":"rgb(95, 149, 255)","lineWidth":2,"shadowColor":"rgb(95, 149, 255)","shadowBlur":10,"text-shape":{"fontWeight":500}},"highlight":{"stroke":"rgb(95, 149, 255)","lineWidth":2,"text-shape":{"fontWeight":500}},"inactive":{"stroke":"rgb(234, 234, 234)","lineWidth":1},"disable":{"stroke":"rgb(245, 245, 245)","lineWidth":1},"edgeStyle":{"default":{"stroke":"#e2e2e2","lineWidth":3,"lineAppendWidth":10},"selected":{"shadowColor":"#626262","shadowBlur":3}},"stroke":"#A3B1BF","lineWidth":2,"strokeOpacity":0.92,"lineAppendWidth":10},"labelCfg":{"position":"center","autoRotate":false},"startPoint":{"x":155.98812924510892,"y":285.35469287559994,"anchorIndex":1},"endPoint":{"x":304.3223042174235,"y":289.0267312661499,"anchorIndex":3},"curveOffset":[-20,20],"curvePosition":[0.5,0.5],"targetAnchor":3,"targetAttrs":[{"key":"id","type":"number(6)","comment":"主键id","isUse":1},{"key":"key","type":"varchar(255)","comment":"关键字","isUse":1},{"key":"gender","type":"enum(M, F)","comment":"gender","isUse":1},{"key":"birthday","type":"date","comment":"生日","isUse":1},{"key":"hometown","type":"varchar(255)","comment":"家乡","isUse":1},{"key":"country","type":"varchar(255)","comment":"国家","isUse":1},{"key":"nation","type":"varchar(255)","comment":"nation","isUse":1},{"key":"jobId","type":"number(3)","comment":"工作id","isUse":1},{"key":"phone","type":"varchar(255)","comment":"电话","isUse":1}],"depth":0}],"combos":[]},
       },
@@ -55,7 +144,7 @@ export default {
   mounted() {
     this.topId = this.$route.params && this.$route.params.topId;
     getQuery(this.topId).then(res =>{
-      console.log(res)
+      this.baseData = res.data
       this.graphData = JSON.parse(res.data.topJson)
       let graphData = deepClone(this.graphData)
       this.$refs.topology.initTopo(graphData)
@@ -99,7 +188,21 @@ export default {
       updateQuery(data).then(res =>{
         console.log(res)
       })
-
+    },
+    doPreview(graphData){
+      if (graphData.nodes&&graphData.nodes.length>0){
+        preview({jsonData:JSON.stringify(graphData)}).then(res=>{
+          this.previewDate.data = res.data
+          this.previewDate.header = []
+          for (var key in this.previewDate.data[0]) {
+            this.previewDate.header.push(key)
+          }
+          this.previewDate.title = this.baseData.uqName + "数据预览"
+          this.previewDate.open = true
+        })
+      }else {
+        this.msgError("top数据有误,请再次检查")
+      }
     },
     randomChange() {
       let graphData = deepClone(this.$refs.topology.getGraphData())
diff --git a/ebts/ebts-generator/src/main/java/com/ebts/generator/controller/TopQueryController.java b/ebts/ebts-generator/src/main/java/com/ebts/generator/controller/TopQueryController.java
index 27e2a40..875faac 100644
--- a/ebts/ebts-generator/src/main/java/com/ebts/generator/controller/TopQueryController.java
+++ b/ebts/ebts-generator/src/main/java/com/ebts/generator/controller/TopQueryController.java
@@ -13,6 +13,9 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.List;
+import java.util.Map;
+
 
 /**
  * @author: Clay
@@ -64,10 +67,10 @@ public class TopQueryController {
     }
 
     /**
-     * 简单修改万能能查询
+     * 简单修改top万能能查询
      */
     @PreAuthorize("@ebts.hasPermi('top:edit')")
-    @Log(title = "万能查询", businessType = BusinessType.UPDATE)
+    @Log(title = "top万能查询", businessType = BusinessType.UPDATE)
     @PutMapping
     public AjaxResult edit(@RequestBody UniQuery uniQuery) {
         if (uniQuery.getId()<0){
@@ -83,6 +86,21 @@ public class TopQueryController {
             return AjaxResult.error(ServerResult.getMsg());
         }
     }
-
-
+    /**
+     * 简单修改top万能能查询
+     */
+    @PreAuthorize("@ebts.hasPermi('top:preview')")
+    @Log(title = "top预览", businessType = BusinessType.OTHER)
+    @PostMapping("/preview")
+    public AjaxResult preview(@RequestBody Map<String,String> params){
+        if (StringUtils.isNull(params.get("jsonData"))){
+            return AjaxResult.error("缺少必要参数!");
+        }
+        ServerResult<List<Map<String, Object>>> serverResult = topQueryService.preview(params.get("jsonData"));
+        if (serverResult.isStart()){
+            return AjaxResult.success(serverResult.getData());
+        }else {
+            return AjaxResult.error(serverResult.getMsg());
+        }
+    }
 }
diff --git a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopQueryService.java b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopQueryService.java
index 2cef5cf..1611f59 100644
--- a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopQueryService.java
+++ b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopQueryService.java
@@ -1,7 +1,6 @@
 package com.ebts.generator.service;
 
-import com.ebts.generator.entity.TopSearchTable;
-import org.apache.poi.ss.formula.functions.T;
+import com.ebts.common.utils.ServerResult;
 
 import java.util.List;
 import java.util.Map;
@@ -15,4 +14,6 @@ import java.util.Map;
 public interface TopQueryService {
 
     Map<String, Object> selectTopSearchTables();
+
+    ServerResult<List<Map<String, Object>>> preview(String jsonData);
 }
diff --git a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopSearchTableService.java b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopSearchTableService.java
index debf537..08aee3b 100644
--- a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopSearchTableService.java
+++ b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/TopSearchTableService.java
@@ -8,15 +8,14 @@ import com.ebts.generator.entity.TopSearchTable;
 
 /**
  * top万能查询主Service接口
- * 
+ *
  * @author clay
  * @date 2021-07-20
  */
-public interface TopSearchTableService
-{
+public interface TopSearchTableService {
     /**
      * 查询top万能查询主
-     * 
+     *
      * @param id top万能查询主ID
      * @return top万能查询主
      */
@@ -24,22 +23,22 @@ public interface TopSearchTableService
 
     /**
      * 查询top万能查询主列表
-     * 
+     *
      * @param topSearchTable top万能查询主
      * @return top万能查询主集合
      */
     ServerResult<List<TopSearchTable>> selectTopSearchTableList(TopSearchTable topSearchTable);
 
     /**
-     *
      * @return
      */
     ServerResult<List<TopSearchTable>> selectTopSearchTableInfo();
 
     List<TopSearchColumn> selectTableColumns(Long id);
+
     /**
      * 新增top万能查询主
-     * 
+     *
      * @param topSearchTable top万能查询主
      * @return 结果
      */
@@ -47,7 +46,7 @@ public interface TopSearchTableService
 
     /**
      * 修改top万能查询主
-     * 
+     *
      * @param topSearchTable top万能查询主
      * @return 结果
      */
@@ -59,7 +58,7 @@ public interface TopSearchTableService
 
     /**
      * 批量删除top万能查询主
-     * 
+     *
      * @param ids 需要删除的top万能查询主ID
      * @return 结果
      */
@@ -67,7 +66,7 @@ public interface TopSearchTableService
 
     /**
      * 删除top万能查询主信息
-     * 
+     *
      * @param id top万能查询主ID
      * @return 结果
      */
diff --git a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/QueryServiceImpl.java b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/QueryServiceImpl.java
index 3d70346..346a2c9 100644
--- a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/QueryServiceImpl.java
+++ b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/QueryServiceImpl.java
@@ -139,7 +139,7 @@ public class QueryServiceImpl implements QueryService {
             return new ServerResult<>(true, dataMap);
         } catch (RuntimeException e) {
             logger.error(e.getMessage());
-            throw new EbtsException(ReturnConstants.OP_ERROR,e);
+            return new ServerResult<>(false, e.getMessage());
         }
     }
 
diff --git a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/TopQueryServiceImpl.java b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/TopQueryServiceImpl.java
index 6db0a2b..a418293 100644
--- a/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/TopQueryServiceImpl.java
+++ b/ebts/ebts-generator/src/main/java/com/ebts/generator/service/impl/TopQueryServiceImpl.java
@@ -1,13 +1,21 @@
 package com.ebts.generator.service.impl;
 
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONArray;
+import com.alibaba.fastjson.JSONObject;
+import com.ebts.common.utils.ServerResult;
+import com.ebts.generator.dao.QueryDao;
 import com.ebts.generator.dao.RelationalMapDao;
 import com.ebts.generator.dao.TopSearchTableDao;
 import com.ebts.generator.entity.RelationalMap;
 import com.ebts.generator.service.TopQueryService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 /**
@@ -18,16 +26,57 @@ import java.util.Map;
  */
 @Service
 public class TopQueryServiceImpl implements TopQueryService {
+    private final Logger logger = LoggerFactory.getLogger(TopQueryServiceImpl.class);
+
     @Autowired
     private TopSearchTableDao topSearchTableDao;
     @Autowired
     private RelationalMapDao relationalMapDao;
+    @Autowired
+    private QueryDao queryDao;
 
     @Override
     public Map<String, Object> selectTopSearchTables() {
-        Map<String,Object> modeMap = new HashMap<>();
-        modeMap.put("tables",topSearchTableDao.selectTopSearchTables());
-        modeMap.put("relationalMap",relationalMapDao.selectRelationalMapList(new RelationalMap()));
+        Map<String, Object> modeMap = new HashMap<>();
+        modeMap.put("tables", topSearchTableDao.selectTopSearchTables());
+        modeMap.put("relationalMap", relationalMapDao.selectRelationalMapList(new RelationalMap()));
         return modeMap;
     }
+
+    @Override
+    public ServerResult<List<Map<String, Object>>> preview(String jsonData) {
+        try {
+
+            JSONObject graphData = JSON.parseObject(jsonData);
+            JSONArray nodes = graphData.getJSONArray("nodes");
+            JSONArray edges = graphData.getJSONArray("edges");
+            JSONObject node = nodes.getJSONObject(0);
+
+            StringBuffer sql = new StringBuffer("select ");
+
+            JSONArray attrs = node.getJSONArray("attrs");
+            boolean start = false;
+            for (int i = 0; i < attrs.size(); i++) {
+                JSONObject column = attrs.getJSONObject(i);
+                if (column.getInteger("isUse") == 1) {
+                    if (start) {
+                        sql.append(", ");
+                    }
+                    sql.append(column.getString("columnName"));
+                    sql.append(" as ");
+                    sql.append("'" + column.getString("columnComment") + "'");
+                    start=true;
+                }
+            }
+            sql.append(" from " + node.getString("table"));
+            System.out.println(sql.toString());
+            List<Map<String, Object>> dataMap = queryDao.UniQuery(sql.toString());
+            return new ServerResult<>(true, dataMap);
+        } catch (RuntimeException e) {
+            logger.error(e.getMessage());
+            return new ServerResult<>(false, e.getMessage());
+        }
+    }
+
+
 }