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首先了解一下neo4j是干什么的 (提供给我们可以直接操作数据库的一个插件)下面是官网
Neo4j Aura
话不多说直接上代码
- <template>
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- <div style="width:100vw;height:100vh">
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- <div
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- ref="graph"
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- style="width:100vw;height:100vh"
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- >
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- </div>
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- </div>
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- </template>
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- <script>
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- export default {
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- data () {
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- return {
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- // 绘制知识图谱的节点数据
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- echartsData: [],
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- nodesRelation: [],
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- echartsNode: [],
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- // 防止出现多个echarts初始化的情况
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- myChart: '',
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- options: {},
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- }
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- },
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- mounted () {
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- this.searchGraph()
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- },
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- methods: {
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- async searchGraph () {
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- const neo4j = require('neo4j-driver')
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- const uri = ''; //ip地址
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- const user = ''; //账号
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- const password = '';//密码
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- const driver = neo4j.driver(uri, neo4j.auth.basic(user, password))
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- const session = driver.session({ database: 'neo4j' })
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-
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- try {
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- // const readQuery1 = `MATCH (n:Person) RETURN n.name AS name `
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- const readQuery2 = `MATCH p=()-->() RETURN p`
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- // const readQuery = `MATCH (p:Person)
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- // WHERE p.name = $personName
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- // RETURN p.name AS name`
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- var me = { records: [] }
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- const result = await session.run(readQuery2, {})
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- me.records = result.records;
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- for (let i = 0; i < me.records.length; i++) {
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- this.echartsData.push({
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- name: me.records[i]._fields[0].segments[0].start.properties.name,
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- category: me.records[i]._fields[0].segments[0].start.labels[0]
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- });
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- this.echartsData.push({
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- name: me.records[i]._fields[0].segments[0].end.properties.name,
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- category: me.records[i]._fields[0].segments[0].end.labels[0]
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- });
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- this.nodesRelation.push({
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- source: me.records[i]._fields[0].segments[0].start.properties.name,
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- target: me.records[i]._fields[0].segments[0].end.properties.name,
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- name: me.records[i]._fields[0].segments[0].relationship.type,
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- });
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- }
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- //删除arr中的重复对象
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- var arrId = [];
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- var legend = [];
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- for (var item of this.echartsData) {
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- legend.push({ name: item.category })
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- if (arrId.indexOf(item.name) == -1) {
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- arrId.push(item.name)
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- this.echartsNode.push(item);
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- }
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- }
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- this.category = Array.from(new Set(legend))
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- session.close();
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- // me.closeLoading(false);
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- var options = {}
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- options = {
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- tooltip: {//弹窗
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- show: false,
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- // enterable: true,//鼠标是否可进入提示框浮层中
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- // formatter: formatterHover,//修改鼠标悬停显示的内容
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- },
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- legend: {
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- type: 'scroll',
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- orient: 'vertical',
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- left: 10,
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- top: 20,
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- bottom: 20,
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- data: this.category
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- },
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- series: [
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- {
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- categories: this.category,
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- type: "graph",
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- layout: "force",
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- zoom: 0.6,
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- symbolSize: 60,
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- // 节点是否可以拖动
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- draggable: true,
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- roam: true,
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- hoverAnimation: false,
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- legendHoverLink: false,
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- nodeScaleRatio: 0.6, //鼠标漫游缩放时节点的相应缩放比例,当设为0时节点不随着鼠标的缩放而缩放
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- focusNodeAdjacency: false, //是否在鼠标移到节点上的时候突出显示节点以及节点的边和邻接节点。
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- // categories: categories,
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- itemStyle: {
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- color: "#67A3FF",
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- },
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- edgeSymbol: ["", "arrow"],
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- // edgeSymbolSize: [80, 10],
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- edgeLabel: {
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- normal: {
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- show: true,
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- textStyle: {
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- fontSize: 12,
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- },
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- formatter (x) {
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- return x.data.name;
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- },
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- },
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- },
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- label: {
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- normal: {
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- show: true,
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- textStyle: {
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- fontSize: 12,
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- },
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- color: "#f6f6f6",
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- textBorderColor: '#67A3FF',
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- textBorderWidth: '1.3',
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- // 多字换行
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- formatter: function (params) {
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- // console.log(params);
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- var newParamsName = "";
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- var paramsNameNumber = params.name.length;
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- var provideNumber = 7; //一行显示几个字
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- var rowNumber = Math.ceil(paramsNameNumber / provideNumber);
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- if (paramsNameNumber > provideNumber) {
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- for (var p = 0; p < rowNumber; p++) {
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- var tempStr = "";
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- var start = p * provideNumber;
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- var end = start + provideNumber;
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- if (p == rowNumber - 1) {
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- tempStr = params.name.substring(start, paramsNameNumber);
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- } else {
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- tempStr = params.name.substring(start, end) + "\n\n";
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- }
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- newParamsName += tempStr;
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- }
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- } else {
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- newParamsName = params.name;
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- }
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- return newParamsName;
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- },
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- },
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- },
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- force: {
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- repulsion: 200, // 节点之间的斥力因子。支持数组表达斥力范围,值越大斥力越大。
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- gravity: 0.01, // 节点受到的向中心的引力因子。该值越大节点越往中心点靠拢。
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- edgeLength: 400, // 边的两个节点之间的距离,这个距离也会受 repulsion影响 。值越大则长度越长
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- layoutAnimation: true, // 因为力引导布局会在多次迭代后才会稳定,这个参数决定是否显示布局的迭代动画
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- // 在浏览器端节点数据较多(>100)的时候不建议关闭,布局过程会造成浏览器假死。
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- },
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- data: this.echartsData,
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- links: this.nodesRelation,
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- // categories: this.categories
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- }
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- ]
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- }
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- console.log(this, 66633);
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- //节点自定义拖拽不回弹
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- this.myChart = this.$echarts.init(this.$refs.graph);
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- const chart = this.myChart;
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- this.myChart.setOption(options);
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- chart.on('mouseup', function (params) {
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- var option = chart.getOption();
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- option.series[0].data[params.dataIndex].x = params.event.offsetX;
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- option.series[0].data[params.dataIndex].y = params.event.offsetY;
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- option.series[0].data[params.dataIndex].fixed = true;
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- chart.setOption(option);
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- });
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- } catch (error) {
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- console.error('Something went wrong: ', error)
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- } finally {
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- // await session.close()
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- }
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- },
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- }
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- }
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- </script>
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- <style lang='less' scoped>
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- </style>
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