关于下载文件以及在swagger-ui中遇到的坑

我就是我 2022-01-26 12:49 1119阅读 0赞

由于需求，需要导出一个带有中文名的json文件，之前已经习惯使用swagger-ui这个测试接口了，所以一开始是这样的

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDU0OTcz_size_16_color_FFFFFF_t_70][]

下载下来的是这种乱码格式的文件，于是乎尝试了这几种：

response.addHeader("Content-Disposition","attachment;fileName=" +new String(fileName.getBytes("UTF-8"),"iso-8859-1"));

response.addHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(fileName,"UTF-8"));

response.setHeader("Content-Disposition", "attachment; fileName="+  fileName +";filename*=utf-8''"+URLEncoder.encode(fileName,"UTF-8"));

后来证明这几个带中文都是可以的（谷歌浏览器）

然鹅，当时我通过swagger-ui下载文件还是中文乱码。。。

并且在尝试的过程中还学了一招，之前单纯的通过OutputStream来输出文件，改为了java NIO的Files.copy

代码：

//		FileInputStream in = null;
    //		OutputStream out = null;
    		try {
    			String fileName = "中文_" + name;
    
    //			 response.setContentType("application/force-download");
    //			response.setHeader("content-disposition", "attachment;filename="  /*+ new String(fileName.getBytes("UTF-8"),"iso-8859-1"));*/
    //			         + URLEncoder.encode(fileName, "iso-8859-1"));
    	        
    //			in = new FileInputStream(filepath);
    //			out = response.getOutputStream();
    //			byte buffer[] = new byte[1024];
    //			int len = 0;
    //			while ((len = in.read(buffer)) > 0) {
    //				out.write(buffer, 0, len);
    //			}
    	        
    	        Path file = Paths.get(JSONPATH, name);
    	        if (Files.exists(file)) {
    	        	response.setContentType("application/force-download");
         //	如果文件名有中文的话，进行URL编码，让中文正常显示
    	response.addHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(fileName,"UTF-8"));
    	            try {
    	                Files.copy(file, response.getOutputStream());
    	            } catch (IOException ex) {
    	            }
    	        }
    		} catch (Exception e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		} finally {
    //			try {
    //				in.close();
    //				out.close();
    //			} catch (IOException e) {
    //				e.printStackTrace();
    //			}
    
    		}

OutputStream已经被我注释了，根据自需来扣代码

后来查询了（谷歌）好几篇文章，脑袋灵光一闪，我直接在地址栏输入:

![20190529090434745.png][]

然后...

![20190529090522508.png][]

ok，完工，告辞！

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDU0OTcz_size_16_color_FFFFFF_t_70]: /images/20220126/9503f4016380448288dca089ae7aea76.png
[20190529090434745.png]: /images/20220126/41e40b6d9e4c46cba5ab53a9cb807c41.png
[20190529090522508.png]: /images/20220126/dc0f7c4eb5fc4fe8851ae20c66185a21.png