文件下载

 

//这种方式会有bug
/*public String download() throws Exception{
        String path=getPath();
        fileNamefileName=fileName.substring(0,4)+"年"+fileName.substring(5,7)+"月"+fileName.substring(8,10)+"日 "+fileName.substring(11,13)+"时"+fileName.substring(14, 16)+"分"+fileName.substring(16,fileName.length());
        fileName=new String(fileName.getBytes(),"iso8859-1");
        File file=new File(path,fileName);
        ServletActionContext.getResponse().setHeader("Content-disposition", "attachment;filename="+fileName);
        FileInputStream fis=new FileInputStream(file);
        byte[] buf=new byte[1024];
        OutputStream os=ServletActionContext.getResponse().getOutputStream();
        int n=-1;
        while((n=fis.read(buf))!=-1){
            os.write(buf, 0, n);
        }
        os.close();
        fis.close();
        return null;
    }*/

//此方式解决上面方式的bug
public String download() throws Exception{
        HttpServletResponse response = ServletActionContext.getResponse();
        HttpServletRequest request = ServletActionContext.getRequest();
        response.setContentType("text/html;charset=utf-8");
        String filePath = getPath();

        BufferedInputStream bis = null;
        OutputStream out = null;
        if(StringUtils.isNotBlank(filePath)){
             try {
//               filePath = "D:\\expDataBackUp\\aa_2013年02月20日11时43分37秒.dmp";
                 fileNamefileName=fileName.substring(0,4)+"年"+fileName.substring(5,7)+"月"+fileName.substring(8,10)+"日 "+fileName.substring(11,13)+"时"+fileName.substring(14, 16)+"分"+fileName.substring(16,fileName.length());
                 bis = new BufferedInputStream(new FileInputStream(filePath+"\\\\"+fileName));
                    response.reset();
                    response.setContentType("application/x-download");
                    //String fileName = new String(filePath.substring(filePath.lastIndexOf("\\")+1, filePath.length()).getBytes(), "iso8859-1");
                    fileName=new String(fileName.getBytes(),"iso8859-1");
                    response.addHeader("Content-Disposition", "attachment;filename="+ fileName);
                    out = response.getOutputStream();
                    byte[] buffer = new byte[1024];
                    int size = 0;
                    while ((size = bis.read(buffer, 0, buffer.length)) != -1) {
                        out.write(buffer, 0, size);
                    }

             } catch (Exception e) {
                e.printStackTrace();
             }finally{//关闭输入输出流
                try {
                    if(out != null)out.close();
                    if(bis != null)bis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
             }
        }else{
        }
        return null;
    }