java 如何实现导出文件

旧城等待， 2021-12-14 23:27 636阅读 0赞

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RhdG91bmlhbzE_size_16_color_FFFFFF_t_70][]

上面的图片比较模糊，下面我们来看看导出的具体的例子

@RequestMapping(value = "/download", method = RequestMethod.GET)
    	@ResponseBody
    	public void testDownload(HttpServletResponse res) {
    		String fileName = "aaa.txt";
    	    res.setHeader("content-type", "text/plain");
    		res.setHeader("content-type", "application/x-msdownload;");
    		res.setContentType("text/plain; charset=utf-8");
    		res.setHeader("Content-Disposition", "attachment; filename=" + fileName);
    		byte[] buff = new byte[1024];
    		BufferedInputStream bis = null;
    		OutputStream os = null;
    
    		try {
    			os = res.getOutputStream();
    			bis = new BufferedInputStream(new FileInputStream(new File("C://Users//lxn//Desktop//aaa.txt")));
    			int i = bis.read(buff);
    
    			while (i != -1) {
    				os.write(buff, 0, buff.length);
    				os.flush();
    				i = bis.read(buff);
    			}
    		} catch (IOException e) {
    			e.printStackTrace();
    		} finally {
    			if (bis != null) {
    				try {
    					bis.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    		}
    		System.out.println("export file finish");
    	}

这个是接口，那么前台怎么处理

$("#dcbtn").click(function() {
    		var serviceUrl = getProjectURL();
    		window.open(serviceUrl + "fpdc/download");
    	})

这样就实现了文件的导出，我们直接用window.open(+资源接口+)

而不是对其返回结果进行window.open

希望对你有所帮助

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