elementui中展示后台傳回來的多個圖片流

1. 前端
如果返回一個圖片的話就可以，直接返回，img標簽可以直接解析，但是如果返回多個圖片，就解析不成功，需要轉成base64編碼(可以在前台轉，也可以在后台進行，此處在java代碼轉化)，再進行src解析

 <!--圖片展示-->
    <el-dialog
      title="憑證圖"
      :visible.sync="dialogVisiblesImage"
      width="50%">
      <div
        v-for="item in imgUrlMany"
        :key="item.id">
        <img
          :src="item.url"
          width="100%"
          style="margin:0 auto">
      </div>
    </el-dialog>

data:數據
imgUrlMany: [],
dialogVisiblesImage: false,

方法：
  // 返回結果是圖片
            detailImages(row.id).then(response => {
              this.imgUrlMany = response.data.map(item => {
                return {
                  url: item.body
                }
              })
              this.dialogVisiblesImage = true
            }).catch(error => {
              this.$message.error(error.message)
            })

2.java

public HttpResult<List<ResponseEntity<String>>> detailImages(@RequestBody String id) {
        List<ResponseEntity<String>> responseEntities = groupPolicyRenewalService.detailImage(id);
        return HttpResultUtil.success("查詢成功",responseEntities);
    }


@Override
public List<ResponseEntity<String>> detailImage(String groupId) {
    List<ResponseEntity<String>> responseEntityList = new ArrayList<>();
    //此處返回的是多個圖片，此處只有一個，修改使用
       
        File file = new File(path);

        HttpHeaders headers = new HttpHeaders();
        String fname = fileInfoDO.getFilename() + "." + fileInfoDO.getFiletype();

        try {
            headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
            headers.set("fileName", URLEncoder.encode(fname, "utf-8"));
            String result = "data:image/jpg;base64,"
                    + new BASE64Encoder().encode(org.apache.commons.io.FileUtils.readFileToByteArray(file));
            ResponseEntity<String> responseEntity = new ResponseEntity<>(result, headers, HttpStatus.OK);
            responseEntityList.add(responseEntity);
        } catch (IOException e) {
            e.printStackTrace();
            throw new RRException("文件加載失敗！");
        }
  
    return responseEntityList;
}

// 主要代碼

String result = "data:image/jpg;base64,"
        + new BASE64Encoder().encode(org.apache.commons.io.FileUtils.readFileToByteArray(file));
把圖片的file轉成base64編碼