springMVC下载文件方法很多，大致看了下，觉得下面这种方法最正规，最符合官网文档介绍。
代码主要有两部分组成
StreamingResponseBody 用来异步下载文件，不占用tomcat工作住线程
ResponseEntity 用来设置头信息,定义下载的文件名称
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| @RequestMapping("/downloadCategoryExcel")
public ResponseEntity<StreamingResponseBody> downloadCategoryExcel(final String param) {
StreamingResponseBody streamingResponseBody = new StreamingResponseBody() {
@Override
public void writeTo(OutputStream outputStream) throws IOException {
String categoryCode = JSON.parseObject(param).getString("categoryCode");
Workbook workbook = excelCreateService.createCategoryTemplate(categoryCode);
workbook.write(outputStream);
}
};
ResponseEntity.BodyBuilder bodyBuilder=ResponseEntity.ok();
bodyBuilder.contentType(MediaType.parseMediaType("application/vnd.ms-excel"));
bodyBuilder.header("Content-Disposition", "attachment;filename=1.xlsx");
bodyBuilder.body(streamingResponseBody);
return bodyBuilder.build();
}
|
springMVC官网介绍
里面有有段话
Note that StreamingResponseBody can also be used as the body in a ResponseEntity in order to customize the status and headers of the response.
