鲁迅说过，只要经常花钱烦恼就会减轻80%，但钱从哪里来呢？鲁迅没说。

一：三级关系图知识图谱

最近写了个demo，主要功能是搜索实体，搜索结果显示与该实体相关的公司、子公司、设备、位置、状态、危害这六类，数据是通过我司的数据标注系统提供的。后端用到的技术栈是python3、java1.8、neo4j3.5和Django。前端通过Django获取数据，做数据处理，搭配好echarts配置参数，比如data、links、categories、symbolSize。

二：先上效果图：

三：data、links、category、symbolSize数据配置

3.1 data配置：想要展示三个层级，定义了三个node 每个node里都配置了name、draggable、category、id、symbolSize

3.2 links配置：数据指向

3.3 category：功能是每个状态对应一个颜色

3.4 symbolSize：data节点的大小，一级的大小是全部二级的总和，二级是三级的总和（原始节点的大小是后台返回来的，做的求和）

//echarts 数据
            var data = [];
            var links = [];
            var n2 = []
            //构造展示的数据
            var maxDisPlayNode = 50;
            var id = 0;
            var num = {}
            var num2 = ''
            var temp = [];
            for (var i = 0; id < maxDisPlayNode && i < searchResult.length; i++) {
              
              var newset1 = searchResult[i]['n1']['label']
              var newset2 = searchResult[i]['n2']['label']
              var newset3 = searchResult[i]['n3']['label']
              n2.push(newset1, newset2, newset3)
              for (var i = 0; i < n2.length; i++) {
                if (temp.indexOf(n2[i]) == -1) {
                  temp.push(n2[i]);
                }
              }


              //获取node1
              node1 = {};
              node1['name'] = searchResult[i]['n1']['title'];
              node1['draggable'] = true;


              var n2Category = searchResult[i]['n1']['label']

              if (n2Category == 'company') {
                node1['category'] = 0;
              } else if (n2Category == 'subsidiary') {
                node1['category'] = 1;
              } else if (n2Category == 'device') {
                node1['category'] = 2;
              } else if (n2Category == 'location') {
                node1['category'] = 3;
              }  else if (n2Category == 'status') {
                node1['category'] = 4;
              } else if (n2Category == 'danger') {
                node1['category'] = 5;
              }

              var flag = 1;
              relationTarget = id.toString();
              for (var j = 0; j < data.length; j++) {
                if (data[j]['name'] === node1['name']) {
                  flag = 0;
                  relationTarget = data[j]['id'];
                  break;
                }
              }
              node1['id'] = relationTarget;
              // num2 = parseInt(searchResult[i]['rel']['entity2_count'])
              // if (!num[node1['id']]) {
              //   num[node1['id']] = num2 + 20
              // } else {
              //   num[node1['id']] += num2
              // }
              node1['symbolSize'] = 1
              if (flag === 1) {
              id++;
              data.push(node1);
              }
              


              //获取node2
              node2 = {};
              node2['name'] = searchResult[i]['n2']['title'];
              node2['draggable'] = true;

              var n2Category = searchResult[i]['n2']['label']
              if (n2Category == 'company') {
                node2['category'] = 0;
              } else if (n2Category == 'subsidiary') {
                node2['category'] = 1;
              } else if (n2Category == 'device') {
                node2['category'] = 2;
              } else if (n2Category == 'location') {
                node2['category'] = 3;
              } else if (n2Category == 'status') {
                node2['category'] = 4;
              } else if (n2Category == 'danger') {
                node2['category'] = 5;
              }
             

              flag = 1;
              relationTarget = id.toString();
              for (var j = 0; j < data.length; j++) {
                if (data[j]['name'] === node2['name']) {
                  flag = 0;
                  relationTarget = data[j]['id'];
                  break;
                }
              }
              node2['id'] = relationTarget;

              num2 = parseInt(searchResult[i]['rel2']['entity2_count'])
              if(!num[node2['id']]){
                  num[node2['id']] = num2 + 20
              } else {
                num[node2['id']] += num2
              }
              
              if (flag === 1) {
                id++;
                data.push(node2);
              }
              



              // 判断有没有node3  有的话push到data和links
              if (searchResult[i]['n3']) {
                node3 = {};
                node3['name'] = searchResult[i]['n3']['title'];
                node3['draggable'] = true;
                
                var n2Category = searchResult[i]['n3']['label']

                if (n2Category == 'company') {
                  node3['category'] = 0;
                } else if (n2Category == 'subsidiary') {
                  node3['category'] = 1;
                } else if (n2Category == 'device') {
                  node3['category'] = 2;
                } else if (n2Category == 'location') {
                  node3['category'] = 3;
                } else if (n2Category == 'status') {
                  node3['category'] = 4;
                } else if (n2Category == 'danger') {
                  node3['category'] = 5;
                }

                flag = 1;
                //        node3['level'] = 3;
                relationTarget = id.toString();
                for (var j = 0; j < data.length; j++) {
                  if (data[j]['name'] === node3['name']) {
                    flag = 0;
                    relationTarget = data[j]['id'];
                    break;
                  }
                }
                node3['id'] = relationTarget;
                num2 = parseInt(searchResult[i]['rel2']['entity2_count'])
                if (!num[node3['id']]) {
                  num[node3['id']] = num2 + 20
                } else {
                  num[node3['id']] += num2
                }

                if (flag === 1) {
                  id++;
                  data.push(node3);
                }


                //获取relation2
                relation2 = {}
                relation2['source'] = node2['id'];
                relation2['target'] = node3['id'];
                relation2['category'] = 0;
                flag = 1;
                for (var j = 0; j < links.length; j++) {
                  if (links[j]['source'] == relation2['source'] && links[j]['target'] == relation2['target']) {
                    links[j]['value'] = searchResult[i]['rel2']['type'];
                    links[j]['entity2_count'] = searchResult[i]['rel2']['entity2_count']
                    flag = 0;
                    break;
                  } 
                }
                if (flag === 1) {
                  relation2['value'] = searchResult[i]['rel2']['type'];
                  relation2['symbolSize'] = 10;
                  links.push(relation2);
                }
              }



              //获取relation1
              relation = {}
              relation['source'] = node1['id'];
              relation['target'] = node2['id'];
              relation['category'] = 0;
              flag = 1;
              for (var j = 0; j < links.length; j++) {
                if (links[j]['source'] == relation['source'] && links[j]['target'] == relation['target']) {
                  links[j]['value'] = searchResult[i]['rel']['type'];
                  links[j]['entity2_count'] = searchResult[i]['rel']['entity2_count'];
                  flag = 0;
                  break;
                }
              }
              if (flag === 1) {
                relation['value'] = searchResult[i]['rel']['type'];
                relation['symbolSize'] = 10;
                links.push(relation);
              }
            }


            // 计算symbolSize大小
            for (var i = 0; i < data.length; i++){
              data[i]['symbolSize'] = num[data[i]['id']]
            }

四：option配置参数

option = {
              title: {
                text: ''
              },
              tooltip: {},
              animationDurationUpdate: 1500,
              animationEasingUpdate: 'quinticInOut',
              label: {
                normal: {
                  show: true,
                  textStyle: {
                    fontSize: 12
                  },
                }
              },
              legend: {
                x: "center",
                data: [{
                  name: '公司',
                  icon: 'rect' //'circle', 'rect', 'roundRect', 'triangle', 'diamond', 'pin', 'arrow'
                },{
                  name: '子公司',
                  icon: 'triangle'
                }, {
                  name: '设备',
                  icon: 'circle'
                }, {
                  name: '位置',
                  icon: 'roundRect'
                }, {
                  name: '状态',
                  icon: 'pin'
                }, {
                  name: '危害',
                  icon: 'diamond'
                }] 
              },
              series: [
                {
                  type: 'graph',
                  layout: 'force',
                  symbolSize: 45,
                  focusNodeAdjacency: true,
                  roam: true,
                  edgeSymbol: ['none', 'arrow'],
                  categories: [{
                    name: '公司',
                    icon: 'rect' //'circle', 'rect', 'roundRect', 'triangle', 'diamond', 'pin', 'arrow'
                  }, {
                    name: '子公司',
                    icon: 'triangle'
                  }, {
                    name: '设备',
                    icon: 'circle'
                  }, {
                    name: '位置',
                    icon: 'roundRect'
                  }, {
                    name: '状态', 
                    icon: 'pin'
                  }, {
                    name: '危害',
                    icon: 'diamond'
                  }],
                  label: {
                    normal: {
                      show: true,
                      textStyle: {
                        fontSize: 12,
                      },
                    }
                  },
                  force: {
                    repulsion: 1000
                  },
                  edgeSymbolSize: [4, 50],
                  edgeLabel: {
                    normal: {
                      show: true,
                      textStyle: {
                        fontSize: 10
                      },
                      formatter: "{c}"
                    }
                  },
                  data: data,  // data数据
                  links: links,  // links 主要是做数据箭头连接
                  lineStyle: {
                    normal: {
                      opacity: 1,
                      width: 3,
                      curveness: 0,
                      color: 'source',
                    }
                  }
                }
              ]
            };

            // 使用刚指定的配置项和数据显示图表。
            myChart.setOption(option);

至此完结！best regards！