Springboot与vue实现数据导出方法具体介绍

@RequestMapping("/download")
public void download(String path, HttpServletResponse response) {
	// 固定写法
	response.setContentType("application/OCTET-STREAM;charset=UTF-8");
	response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
	File file = new File(path);
	try {
	    InputStream fis = new FileInputStream(file);
	    OutputStream out = new BufferedOutputStream(response.getOutputStream());
	    byte[] buffer = new byte[1024];
	    int len;
	    while ((len = fis.read(buffer)) != -1) {
	        out.write(buffer, 0, len);
	        out.flush();
	    }
	} catch (Exception e) {
		throw new RuntimeException(e);
	}
}

    handleExport(row) {
      const id = row.id || this.ids
      const name = row.name || this.names[0]
      const code = row.code || this.codes
      const params = {
        exportCodes: JSON.stringify(code)
      }
      this.download('/Thingmax/Things/Export',  params,  name + '.json')
    },

exportEntities.put("Entities", entities);
String content = exportEntities.toJSONString();
try {
	BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());
	out.write(content.getBytes(StandardCharsets.UTF_8));
	out.flush();
	out.close();
} catch (Exception e) {
     throw new RuntimeException(e);
 }

InputStream inputStream = new FileInputStream(path);
ServletOutputStream outputStream = response.getOutputStream();
   byte[] b = new byte[1024];
   int len;
   //从输入流中读取一定数量的字节，并将其存储在缓冲区字节数组中，读到末尾返回-1
   while ((len = inputStream.read(b)) > 0) {
       outputStream.write(b, 0, len);
   }