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jeecgboot-vue3/src/views/system/address/components/DepartLeftTree.vue

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+<template>
+  <a-card :bordered="false" style="height: 100%">
+    <a-spin :spinning="loading">
+      <a-input-search placeholder="按部门名称搜索…" style="margin-bottom: 10px" @search="onSearch" allowClear />
+      <!--组织机构树-->
+      <template v-if="treeData.length > 0">
+        <a-tree
+          v-if="!treeReloading"
+          showLine
+          :clickRowToExpand="false"
+          :treeData="treeData"
+          :selectedKeys="selectedKeys"
+          :load-data="loadChildrenTreeData"
+          v-model:expandedKeys="expandedKeys"
+          @select="onSelect"
+        ></a-tree>
+      </template>
+      <a-empty v-else description="暂无数据" />
+    </a-spin>
+  </a-card>
+</template>
+
+<script lang="ts" setup>
+  import { inject, nextTick, ref, unref } from 'vue';
+  import { queryDepartTreeSync } from '../address.api';
+  import { searchByKeywords } from '/@/views/system/departUser/depart.user.api';
+  import { Popconfirm } from 'ant-design-vue';
+
+  const prefixCls = inject('prefixCls');
+  const emit = defineEmits(['select', 'rootTreeData']);
+
+  const loading = ref<boolean>(false);
+  // 部门树列表数据
+  const treeData = ref<any[]>([]);
+  // 当前展开的项
+  const expandedKeys = ref<any[]>([]);
+  // 当前选中的项
+  const selectedKeys = ref<any[]>([]);
+  // 树组件重新加载
+  const treeReloading = ref<boolean>(false);
+  // 当前选中的部门
+  const currentDepart = ref<any>(null);
+  // 搜索关键字
+  const searchKeyword = ref('');
+
+  // 加载顶级部门信息
+  async function loadRootTreeData() {
+    try {
+      loading.value = true;
+      treeData.value = [];
+      const result = await queryDepartTreeSync();
+      if (Array.isArray(result)) {
+        treeData.value = result;
+      }
+      if (expandedKeys.value.length === 0) {
+        autoExpandParentNode();
+      }
+    } finally {
+      loading.value = false;
+    }
+  }
+
+  loadRootTreeData();
+
+  // 加载子级部门信息
+  async function loadChildrenTreeData(treeNode) {
+    try {
+      const result = await queryDepartTreeSync({
+        pid: treeNode.dataRef.id,
+      });
+      if (result.length == 0) {
+        treeNode.dataRef.isLeaf = true;
+      } else {
+        treeNode.dataRef.children = result;
+        if (expandedKeys.value.length > 0) {
+          // 判断获取的子级是否有当前展开的项
+          let subKeys: any[] = [];
+          for (let key of expandedKeys.value) {
+            if (result.findIndex((item) => item.id === key) !== -1) {
+              subKeys.push(key);
+            }
+          }
+          if (subKeys.length > 0) {
+            expandedKeys.value = [...expandedKeys.value];
+          }
+        }
+      }
+      treeData.value = [...treeData.value];
+    } catch (e) {
+      console.error(e);
+    }
+    return Promise.resolve();
+  }
+
+  // 自动展开父节点，只展开一级
+  function autoExpandParentNode() {
+    let item = treeData.value[0];
+    if (item) {
+      if (!item.isLeaf) {
+        expandedKeys.value = [item.key];
+      }
+      reloadTree();
+    }
+  }
+
+  // 重新加载树组件，防止无法默认展开数据
+  async function reloadTree() {
+    await nextTick();
+    treeReloading.value = true;
+    await nextTick();
+    treeReloading.value = false;
+  }
+
+  /**
+   * 设置当前选中的行
+   */
+  function setSelectedKey(key: string, data?: object) {
+    selectedKeys.value = [key];
+    if (data) {
+      currentDepart.value = data;
+      emit('select', data);
+    }
+  }
+
+  // 搜索事件
+  async function onSearch(value: string) {
+    if (value) {
+      try {
+        loading.value = true;
+        treeData.value = [];
+        let result = await searchByKeywords({ keyWord: value });
+        if (Array.isArray(result)) {
+          treeData.value = result;
+        }
+        autoExpandParentNode();
+      } finally {
+        loading.value = false;
+      }
+    } else {
+      loadRootTreeData();
+    }
+    searchKeyword.value = value;
+  }
+
+  // 树选择事件
+  function onSelect(selKeys, event) {
+    if (selKeys.length > 0 && selectedKeys.value[0] !== selKeys[0]) {
+      setSelectedKey(selKeys[0], event.selectedNodes[0]);
+    } else {
+      // 这样可以防止用户取消选择
+      setSelectedKey(selectedKeys.value[0]);
+    }
+  }
+
+  defineExpose({
+    loadRootTreeData,
+  });
+</script>