项目初始化

src/app/shared/utils/file.util.ts

@@ -0,0 +1,76 @@
+import { Injectable } from '@angular/core';
+import { _HttpClient } from '@delon/theme';
+import * as FileSaver from 'file-saver';
+import { NzModalService } from 'ng-zorro-antd/modal';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class EAFileUtil {
+  constructor(private modal: NzModalService, private http: _HttpClient) {}
+
+  /**
+   * 保存文件
+   * @param content 需要保存的内容
+   * @param filename 文件名
+   * @param confirm 显示确认框
+   */
+  save(content: any, filename: string, confirm: boolean = true): void {
+    const blob = new Blob([JSON.stringify(content)], { type: 'text/plain;charset=utf-8' });
+    if (confirm === true) {
+      this.modal.confirm({
+        nzTitle: '<i>文件下载确认</i>',
+        nzContent: `<b>是否下载文件：<u><i>${filename}</i></u> ？</b>`,
+        nzOnOk: () => {
+          FileSaver.saveAs(blob, filename);
+        },
+      });
+    } else {
+      FileSaver.saveAs(blob, filename);
+    }
+  }
+
+  /**
+   * @param url 接口地址
+   * @param body post请求参数
+   * @param params get请求参数
+   * @method 请求方法
+   */
+  download(url: string, body: any, params: any, method: 'POST' | 'GET' = 'POST'): void {
+    if (method === 'POST') {
+      this.http
+        .post(url, body, params, {
+          responseType: 'blob',
+          observe: 'response',
+        })
+        .subscribe((res) => {
+          this.saveBlob(res);
+        });
+    } else if (method === 'GET') {
+      this.http
+        .get(url, params, {
+          responseType: 'blob',
+          observe: 'response',
+        })
+        .subscribe((res) => {
+          this.saveBlob(res);
+        });
+    }
+  }
+
+  /**
+   * 创建blob对象，并利用浏览器打开url进行下载
+   * @param data 文件流数据
+   */
+  private saveBlob(res: any): void {
+    const disp = res.headers.get('Content-Disposition');
+    const blob = new Blob([res.body], { type: 'text/plain;charset=utf-8' });
+    const url = window.URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    const fileName = disp.split(';')[1].split('=')[1];
+    a.href = url;
+    a.download = decodeURI(fileName);
+    a.click();
+    window.URL.revokeObjectURL(url);
+  }
+}