async handleDownload(row) { try { const res = await this.$api.downloadFileById(row.id); if (res.status === 200) { const fileUrl = window.URL.createObjectURL(new Blob([res.data])); const link = document.createElement('a');//创建a标签 link.style.display = 'none'; //将a标签隐藏 link.href = fileUrl; link.setAttribute('download','' ); link.target = '_blank'; link.click(); } else { console.log('Something went wrong'); } } catch (error) { console.error('Error occurred while downloading file:', error); } },这段代码中，responseType:'blob这行代码写哪

在你调用`this.$api.downloadFileById(row.id)`时，应该把`responseType: 'blob'`作为配置项传入。例如：

const res = await this.$api.downloadFileById(row.id, { responseType: 'blob' });

这样可以确保返回的响应数据是一个 Blob 对象。

相关问题

把这两个页面使用Composition API重构要求用vue2

将 `ProjectMaterialStatistics.vue` 和 `ProjectMaterialDetails.vue` 使用 Composition API 进行重构，并且保证在 Vue 2 中运行，可以按照以下步骤进行：

### 1. 安装 `@vue/composition-api`

首先，需要安装 `@vue/composition-api` 插件，以便在 Vue 2 中使用 Composition API。

npm install @vue/composition-api

### 2. 修改主文件引入插件

在 `main.js` 或者 `main.ts` 文件中引入并注册 `@vue/composition-api`。

import Vue from 'vue';
import App from './App.vue';
import '@vue/composition-api';

Vue.config.productionTip = false;

new Vue({
  render: h => h(App),
}).$mount('#app');

### 3. 重构 `ProjectMaterialStatistics.vue`

#### 原始代码结构

原始代码使用了 Options API，我们需要将其转换为 Composition API。

#### 重构后的代码

<template>
  <a-spin :spinning="spinning" tip="报表同步中，请稍等">
    <a-card :bordered="false">
      <!-- 查询区域 -->
      <div class="table-page-search-wrapper">
        <a-form layout="inline" @keyup.enter.native="searchQuery">
          <a-row :gutter="24">
            <a-col>
              <my-fast-date-picker
                :radioList="[{
                  value: 2,
                  text: '月'
                }, {
                  value: 3,
                  text: '年'
                }]"
                :radioVal="2"
                :currName="'近半年'"
                :showRadioGroup="true"
                :fastTime="fastTime"
                @change="change"
              >
                <template v-slot:text>时间：</template>
              </my-fast-date-picker>
            </a-col>
            <template v-if="toggleSearchStatus">
              <a-col :xl="6" :lg="7" :md="8" :sm="24">
                <a-form-item label="项目编号：">
                  <a-input placeholder="请输入项目编号" allow-clear v-model="queryParam.projectCode"></a-input>
                </a-form-item>
              </a-col>
              <a-col :xl="6" :lg="7" :md="8" :sm="24">
                <a-form-item label="项目名称">
                  <a-select
                    allow-clear
                    show-search
                    v-model="queryParam.projectName_Code"
                    placeholder="请输入项目名称"
                    style="width: 100%"
                    :show-arrow="false"
                    :filter-option="false"
                    :not-found-content="null"
                    @search="projectCodeSearch"
                    @change="projectCodeChange"
                  >
                    <a-select-option v-for="d in projectNameList" :key="d.id">{{ d.text }}</a-select-option>
                  </a-select>
                </a-form-item>
              </a-col>
              <a-col :xl="6" :lg="7" :md="8" :sm="24">
                <a-form-item label="物资">
                  <a-input placeholder="请输入物资编号/名称" allow-clear v-model="queryParam.keyWord"></a-input>
                </a-form-item>
              </a-col>
              <a-col :xl="6" :lg="7" :md="8" :sm="24">
                <a-form-item label="厂商">
                  <j-search-select-tag
                    placeholder="请选择厂商"
                    v-model="queryParam.producerId"
                    dict="biz_product_vendor,abbreviation,id,del_flag = 0 and status = 1"
                  />
                </a-form-item>
              </a-col>
              <a-col :xl="6" :lg="7" :md="8" :sm="24">
                <a-form-item label="规格型号">
                  <a-input placeholder="请输入规格型号" allow-clear v-model="queryParam.specification"></a-input>
                </a-form-item>
              </a-col>
            </template>
            <a-col :xl="6" :lg="7" :md="8" :sm="24">
              <span style="float: left; overflow: hidden;" class="table-page-search-submitButtons">
                <a-button type="primary" @click="searchQuery" icon="search">查询</a-button>
                <a-button type="primary" @click="searchReset" icon="reload" style="margin-left: 8px">重置</a-button>
                <a @click="handleToggleSearch" style="margin-left: 8px">{{ toggleSearchStatus ? '收起' : '展开' }}
                  <a-icon :type="toggleSearchStatus ? 'up' : 'down'" />
                </a>
              </span>
            </a-col>
          </a-row>
        </a-form>
      </div>
      <!-- 查询区域-END -->
      <!-- 操作按钮区域 -->
      <div class="table-operator">
        <div>
          <a-button type="primary" icon="download" @click="handleExportXlsx()">导出</a-button>
        </div>
      </div>
      <!-- table区域-begin -->
      <div>
        <a-table
          ref="table"
          size="middle"
          :scroll="{ x: true }"
          bordered
          row-key="uniqueId"
          :columns="columns"
          :data-source="dataSource"
          :pagination="ipagination"
          :loading="loading"
          class="j-table-force-nowrap"
          @change="handleTableChange"
        >
          <span slot="receivingFreezeAmount">
            领用冻结
            <a-tooltip>
              <template slot="title">
                项目领用申请审核通过后，待出库的数量。
              </template>
              <a-icon type="info-circle" />
            </a-tooltip>
          </span>
          <span slot="receivingFreezeAmount_title">
            预算余量
            <a-tooltip>
              <template slot="title">
                预算余量=预算总数-领用冻结-领用总数+领用归还
              </template>
              <a-icon type="info-circle" />
            </a-tooltip>
          </span>
          <span slot="requisitionAmount_title">
            领用总数
            <a-tooltip>
              <template slot="title">
                项目盘盈更新领用余料时，会自动产生领用增补单（不受预算限制），可能导致领用总数超过预算总数。
              </template>
              <a-icon type="info-circle" />
            </a-tooltip>
          </span>
          <span slot="budgetTotalAmount" slot-scope="text, record">
            <a-tooltip>
              <template slot="title">
                <div class="tipItem">
                  <div>预算编号</div>
                  <div>预算数</div>
                </div>
                <div v-for="(value, key) in record.budgetDetail" class="tipItem" v-show="key !== '小计'">
                  <div>{{ key }}</div>
                  <div>{{ value }}</div>
                </div>
                <div class="tipItem">
                  <div>小记</div>
                  <div>{{ text }}</div>
                </div>
              </template>
              <span style="color: blue">{{ text }}</span>
            </a-tooltip>
          </span>
          <span slot="budgetSurplusAmount" slot-scope="text, record">
            <span :style="{ color: record.budgetSurplusAmount <= projectBudgetMarginWarning ? 'red' : 'black' }">
              {{ text }}
            </span>
          </span>
          <span slot="inventoryAmount" slot-scope="text, record">
            <span :style="{ color: record.inventoryAmount <= record.budgetSurplusAmount ? 'red' : 'black' }">
              {{ text }}
            </span>
          </span>
        </a-table>
      </div>
    </a-card>
  </a-spin>
</template>

<script>
import { reactive, computed, onMounted, watch } from '@vue/composition-api';
import { getAction, postAction } from '@/api/manage';
import MyFastDatePicker from '@/components/date/MyFastDatePicker';
import '@/assets/less/TableExpand.less';
import { mixinDevice } from '@/utils/mixin';
import { JeecgListMixin } from '@/mixins/JeecgListMixin';

export default {
  name: 'ProjectMaterialStatistics',
  components: {
    MyFastDatePicker,
  },
  setup(props, { root }) {
    const state = reactive({
      projectNameList: [],
      projectName_Code: '',
      projectBudgetMarginWarning: 0,
      expandedRowKeys: [],
      workorderProjectList: [],
      description: '营业报表管理页面',
      fastTime: ['本月', '上月', '近半年'],
      noCreate: true,
      hasUpdateTime: true,
      configOrderSubTypeList: [],
      configOrderSubTypeTemp: undefined,
      allDepartList: [],
      hallCodeDataList: [],
      spinning: false,
      checkFlag: true,
      updateTime: '',
      url: {
        list: '/web/projectUseMaterial/list',
        exportXlsxUrl: '/web/projectUseMaterial/export',
        exportPdfUrl: '/web/bizBusinessRecord/exportpdf',
        exportDetailUrl: '/web/bizBusinessRecord/exportDetailExcel',
      },
      keyList: ['saleNum', 'saleName', 'terminalTypeName', 'userTypeName', 'configOrderMainTypeName', 'configOrderSubTypeName'],
      ipagination: {
        current: 1,
        pageSize: 20,
        pageSizeOptions: ['20', '50', '80'],
        showTotal(total, range) {
          return `${range[0]}-${range[1]} 共${total}条`;
        },
        showQuickJumper: true,
        showSizeChanger: true,
        total: 0,
      },
      columns: [
        { title: '项目编号', align: 'center', dataIndex: 'projectCode', customRender: (text, row, index) => renderMergedCells(text, row, index) },
        { title: '项目名称', align: 'center', dataIndex: 'projectName', customRender: (text, row, index) => renderMergedCells(text, row, index) },
        { title: '物资编号', align: 'center', dataIndex: 'materialCode' },
        { title: '物资名称', align: 'center', dataIndex: 'materialName' },
        { title: '厂商', align: 'center', dataIndex: 'producerId_dictText' },
        { title: '规格型号', align: 'center', dataIndex: 'specification' },
        { title: '单位', align: 'center', dataIndex: 'unit' },
        { title: '预算总数', align: 'center', dataIndex: 'budgetTotalAmount', scopedSlots: { customRender: 'budgetTotalAmount' } },
        { align: 'center', slots: { title: 'receivingFreezeAmount' }, dataIndex: 'receivingFreezeAmount' },
        { align: 'center', slots: { title: 'requisitionAmount_title' }, dataIndex: 'receivingTotalAmount' },
        { title: '领用余料', align: 'center', dataIndex: 'receivingSurplusAmount' },
        { title: '领料使用', align: 'center', dataIndex: 'receivingUseAmount' },
        { align: 'center', dataIndex: 'budgetSurplusAmount', slots: { title: 'receivingFreezeAmount_title' }, scopedSlots: { customRender: 'budgetSurplusAmount' } },
        { title: '库存可用数', align: 'center', dataIndex: 'inventoryAmount', scopedSlots: { customRender: 'inventoryAmount' } },
      ],
      queryParam: {
        projectCode: '',
        keyWord: '',
        producerId: '',
        specification: '',
        projectName_Code: '',
        projectName: '',
      },
      toggleSearchStatus: false,
      dataSource: [],
      loading: false,
    });

    const renderMergedCells = (value, row, index) => {
      const obj = { children: value, attrs: {} };
      if (index === 0 || row.projectName !== state.dataSource[index - 1].projectName) {
        let rowSpan = 1;
        for (let i = index + 1; i < state.dataSource.length; i++) {
          if (state.dataSource[i].projectName === row.projectName) {
            rowSpan++;
          } else {
            break;
          }
        }
        obj.attrs.rowSpan = rowSpan;
      } else {
        obj.attrs.rowSpan = 0;
      }
      return obj;
    };

    const projectCodeSearch = async (value) => {
      const res = await getAction('/web/projectRecord/searchMainProject', { order: 'desc', pageNo: 1, pageSize: 100, keyword: value });
      state.projectNameList = res.result.map(item => ({ id: item.id, value: item.projectCode, text: item.projectName }));
    };

    const projectCodeChange = (value) => {
      const obj = state.projectNameList.filter(item => item.id === value);
      if (obj.length > 0) {
        state.exportParams.projectName = obj[0].text;
        state.queryParam.projectName = obj[0].text;
      } else {
        state.exportParams.projectName = '';
        state.queryParam.projectName = '';
      }
    };

    const change = (val1, val2, val3) => {
      state.exportParams.dateTpye = val3 === 2 ? 1 : 2;
      state.queryParam.beginDate = val1;
      state.queryParam.endDate = val2;
      state.queryParam.hiddenZeroTotalAmountFlag = state.checkFlag ? 1 : 0;
    };

    const searchQuery = () => {
      state.loadData(1);
    };

    const searchReset = () => {
      state.queryParam.projectCode = '';
      state.queryParam.keyWord = '';
      state.queryParam.producerId = '';
      state.queryParam.specification = '';
      state.queryParam.projectName_Code = '';
      state.queryParam.projectName = '';
      state.loadData(1);
    };

    const handleToggleSearch = () => {
      state.toggleSearchStatus = !state.toggleSearchStatus;
    };

    const handleExportXlsx = () => {
      // 导出逻辑
    };

    const handleTableChange = (pagination, filters, sorter) => {
      // 表格变化逻辑
    };

    const loadData = async (page) => {
      state.loading = true;
      try {
        const res = await getAction(state.url.list, { ...state.queryParam, page });
        state.dataSource = res.result.records;
        state.ipagination.total = res.result.total;
      } finally {
        state.loading = false;
      }
    };

    onMounted(() => {
      loadData(1);
      postAction('/web/sysCompany/queryLoginCompany').then(res => {
        state.projectBudgetMarginWarning = res.result.projectBudgetMarginWarning || 0;
      });
    });