springmvc实现浏览器下载文件

最新推荐文章于 2024-08-09 21:55:43 发布

原创最新推荐文章于 2024-08-09 21:55:43 发布 · 1.1k 阅读

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该博客介绍了如何使用SpringMVC在浏览器中实现文件的下载功能。通过FileCopyUtils工具类，从指定的文件路径读取文件内容，转换为字节数组，然后进行处理以供下载。

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import org.springframework.util.FileCopyUtils;

/**

* 下载Excel
* @param request
* @param response
* @throws IOException

public static byte[] getBytes(String filePath){
byte[] buffer = null;
try {
File file = new File(filePath);
FileInputStream fis = new FileInputStream(file);
ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
byte[] b = new byte[1000];
int n;
while ((n = fis.read(b)) != -1) {
bos.write(b, 0, n);
}
fis.close();
bos.close();
buffer = bos.toByteArray();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return buffer;
}

@RequestMapping("download")
public void download(HttpServletRequest request,HttpServletResponse response) throws IOException {
String time = request.getParameter("time");
String path = BaseUtil.readValue("PAYMENTORDER_EXCEL_BAK")+ "/收费记录_"+time+".xlsx";// 生成Excel的文件地址
String fileNameStr = "收费记录_"+time+".xlsx";
String fileName = new String(fileNameStr.getBytes("UTF-8"),"iso-8859-1");// 为了解决中文名称乱码问题
response.setContentType("application/x-msdownload");
response.setCharacterEncoding("UTF-8");
response.setHeader("Content-disposition", "attachment; filename=\""+ fileName + "\"");
FileCopyUtils.copy(getBytes(path),response.getOutputStream());

}