界面：

关键代码：

// html代码
<el-select v-model="welcomeReport.reportName" placeholder="请选择报表路径"  style="width: 560px" ref="selectReport">
                <el-option :value="welcomeReport.reportId" :label="welcomeReport.reportName" style="width: 560px;height:200px;overflow: auto;background-color:#fff">
                    <el-tree
                            :data="reportData"
                            :props="defaultProps"
                            @node-click="handleNodeClick"
                    ></el-tree>
                </el-option>
            </el-select>


//js代码
handleNodeClick:function(node){
                console.log(node,'node')
                if(node.children){

                }else{
                    this.welcomeReport.reportId = node.url
                    this.welcomeReport.reportName = node.label
                    this.$refs.selectReport.blur()
                    console.log(this.welcomeReport.reportName,"this.welcomeReport.reportName")
                }
            }