vue下载zip文件

曾经终败给现在 2022-03-12 19:07 513阅读 0赞

前台 ：

<q-btn color="primary" size="md" @click="downwin">
        downwin () {
          this.$axios({
            method: 'get',
            url: '/updateServerVersion/zipdownload?filename=electron-mat.zip',
            dataType: 'json',
            responseType: 'arraybuffer' // 该条件是重点
          }).then((res) => {
            const content = res
            const blob = new Blob([content])
            const fileName = 'electron-mat.zip'
            if ('download' in document.createElement('a')) { // 非IE下载
              const elink = document.createElement('a')
              elink.download = fileName
              elink.style.display = 'none'
              elink.href = URL.createObjectURL(blob)
              document.body.appendChild(elink)
              elink.click()
              URL.revokeObjectURL(elink.href) // 释放URL 对象
              document.body.removeChild(elink)
            } else { // IE10+下载
              navigator.msSaveBlob(blob, fileName)
            }
          }).catch((res) => {
            console.log(res)
          });
        }

后台：

filename由前台传入判断下载哪个版本文件，response.setHeader是解决跨域问题，可根据实际情况设置，其中有几个必设，

以流形式发送到前台必须设response.setContentType("application/octet-stream;charset=ISO8859-1");

@SuppressWarnings("unchecked")
        @ResponseBody
        @RequestMapping(value = "/zipdownload", method = {RequestMethod.POST, RequestMethod.GET})
        public void zipdownload(HttpServletRequest request, HttpServletResponse response, String filename) {
            try {
                response.setCharacterEncoding("utf-8");
                String filerootpath = System.getProperty("catalina.home")+"/webapps/clientsoftware/";
                filerootpath = filerootpath.replaceAll("\\\\", "/");
                String realPath = filerootpath + filename;
                File file = new File(realPath);
                // File file = new File(filerootpath, filename);
                // 以流的形式下载文件。
                String str = realPath.replaceAll("\\\\", "/");
                InputStream fis = new BufferedInputStream(new FileInputStream(str));
                byte[] buffer = new byte[fis.available()];
                fis.read(buffer);
                fis.close();
                // 清空response
                response.reset();
                OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
                response.addHeader("Content-Disposition", "attachment;filename=" + filename);
                response.addHeader("Content-Length", "" + file.length());
                response.setContentType("application/octet-stream;charset=ISO8859-1");
                response.setHeader("Access-Control-Allow-Origin",request.getHeader("Origin"));
                response.setHeader("Access-Control-Allow-Credentials", "true");
                toClient.write(buffer);
                toClient.flush();
                toClient.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }