ResponseEntity下载文件

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前端依赖

FileSaver.js

前端

import FileSaver from '../xxx/FileSaver.js';

const params = {
};
return this.$http({
    method: 'GET',
    url: '/download.json',
    // responseType必须值,否则文件下载后乱码
    responseType: 'arraybuffer',
    params: params
}).then(function (response) {
    let body = response.data;
    let contentDisposition = response.headers('Content-Disposition');
    // 获取文件名
    let fileName;
    for (let key of contentDisposition.split(';')){
        let name = key.split('=')[0].trim();
        if (name === 'filename'){
            fileName = key.split('=')[1].trim();
            // 解决中文乱码
            fileName = decodeURIComponent(escape(fileName));
            // 去除首尾多余双引号
            fileName = fileName.replace(/"/g, '');
        }
    }
    if (body) {
        let file = new Blob([body], {
            type: "application/octet-stream"
        });
        FileSaver.saveAs(file, fileName);
    } else {
        // 下载失败
    }
}).catch(error => {
  this.$log.log(error);
});

后端

@GetMapping("/download.json")
public ResponseEntity<byte[]> download() {
    byte[] bytes;
    HttpHeaders headers = new HttpHeaders();
    String filename = new String(new String("file.xlsx").getBytes("utf-8"), "iso-8859-1");
    headers.setContentDispositionFormData("attachment", filename);
    headers.setContentLength(bytes.length);
    headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
    return new ResponseEntity<byte[]>(bytes, headers, HttpStatus.OK);
}