java中使用springmvc实现下载文件


下载文件具体实现代码:

public class TestDownload{   public HttpServletRequest request;   public HttpServletResponse response;   //下载文件
  public static void downLoadFile(){     String downloadFileName = "下载后文件名_TEST.xlsx"; FileInputStream inputStream = null; OutputStream outputStream = null; File file = null; try { file = new File(getFilePath(request)); if (!file.exists()) { log.info("日报文件不存在,请重新导出数据"); } else { inputStream = new FileInputStream(file); response.setContentType("application/txt;charset=utf-8"); response.setHeader("Content-Disposition", "attachment;Filename=" + new String(downloadFileName.getBytes("GB2312"), "ISO8859-1"));// 设置下载后文件的名字、防止中文乱码
 outputStream = response.getOutputStream(); byte[] bytes = new byte[1024]; int len = 0; while ((len = inputStream.read(bytes)) > 0) { outputStream.write(bytes, 0, len); } }       } catch (IOException e) {   log.error("文件下载异常:", e);   } finally {   try {    if (inputStream != null) {    inputStream.close();   }   if (outputStream != null) {    outputStream.close();   }   } catch (IOException e) {    log.error("下载日报中关闭流异常 :{} ", e);    }   }   } //获取服务器文件路径
  private String getFilePath(HttpServletRequest request) { String fileName = "服务器文件.xlsx"; String projectPath = request.getSession().getServletContext().getRealPath("/downloadfile/tset"); return projectPath + "/" + fileName; } }

 

 


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