Question

我编写了一个从DB（mySQL）上传和下载文件（.doc，.xls和.txt）的程序。它是使用Spring MVC编写的。上传和下载在IE中正常工作，但在Firefox中，它不能作为例外工作。

要下载文件，请在JSP中提供一个链接，点击该链接将弹出“文件下载”对话框。在IE中弹出这个对话框，允许以正确的格式打开和/或保存文件（即.doc，.xls和/或.txt）。

在Firefox中，点击链接时会执行以下操作：

对于.doc文件，它会打开文件（没有“文件下载”弹出窗口）
对于.xls文件，可以看到“文件下载”弹出窗口，但文件扩展名不会被视为.xls，而是将其视为file.do

FileController类

public class FileController extends AbstractFormController{
SearchResultService searchResultService;

public void setSearchResultService(SearchResultService searchResultService){
this.searchResultService = searchResultService;
}


@Override
protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
ResultSet result = searchResultService.getAttachment(Integer.parseInt(arg0.getParameter("prbId")));
byte[] buff = new byte[100000];
try {
result.next();
if(!(result.getBinaryStream(1)==null)){
String filename = "fname."+result.getString("file_ext");
if(result.getString("file_ext").equals("txt")){
InputStream is = result.getBinaryStream(1);
OutputStream out = arg1.getOutputStream();
arg1.reset();
int bytesRead;
while ((bytesRead = is.read(buff)) != -1) {
out.write(buff, 0, bytesRead);
}
arg1.setContentType("");
arg1.setHeader("content-disposition", "attachment; filename="+filename);
is.close();
out.flush();
out.close();
}else{
arg1.reset();
if(result.getString("file_ext").equals("doc")||result.getString("file_ext").equals("docx")){
arg1.setContentType("application/msword");
}else if(result.getString("file_ext").equals("xls")||result.getString("file_ext").equals("xlsx")){
arg1.setContentType("application/vnd.ms-excel");
}else if(result.getString("file_ext").equals("pdf")){
arg1.setContentType("application/pdf");
}
arg1.setHeader("Content-Desposition","attachment; filename="+filename);
byte[] bytesGot = result.getBytes(1);
ServletOutputStream outs = arg1.getOutputStream();
outs.write(bytesGot);
outs.flush();
outs.close();
}
}
} catch (SQLException e) {
e.printStackTrace();
}
return new ModelAndView();
}
}

调用FileController类

<a href="<%=contextPath%>/file.do?prbId=<%=desc.getProblemId() %>">Download File</a>

正确地在db中保存/检索所有扩展。请帮忙。

Answer 1

对于第2点 - 设置标题时出现拼写错误。

arg1.setHeader("Content-Desposition","attachment; filename="+filename);

应该是Content-Disposition而不是Content-Desposition。

对于第1点 - 尝试重置浏览器首选项。有关详细信息，请参阅this链接。

Answer 2

您需要设置正确的标头。我正在设置这些标题以下载我的.xls文件及其工作。

response.setHeader("Pragma", "public");
response.setHeader("Expires", "0");
response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
response.setHeader("Content-type", "application-download");
response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
response.setHeader("Content-Transfer-Encoding", "binary");

Answer 3


    public class FileController extends AbstractFormController{
    SearchResultService searchResultService;

    public void setSearchResultService(SearchResultService searchResultService){
    this.searchResultService = searchResultService;
    }


    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
    ResultSet result = searchResultService.getAttachment(Integer.parseInt(arg0.getParameter("prbId")));
    byte[] buff = new byte[100000];
    try {
    result.next();
    if(!(result.getBinaryStream(1)==null)){
    String filename = "fname."+result.getString("file_ext");
    if(result.getString("file_ext").equals("txt")){
    InputStream is = result.getBinaryStream(1);
    OutputStream out = arg1.getOutputStream();
    arg1.reset();
    int bytesRead;
    while ((bytesRead = is.read(buff)) != -1) {
    out.write(buff, 0, bytesRead);
    }
    response.setContentType("text/plain");
    arg1.setHeader("content-disposition", "attachment; filename="+filename);
    is.close();
    out.flush();
    out.close();
    }else{
    arg1.reset();
    if(result.getString("file_ext").equals("doc")||result.getString("file_ext").equals("docx")){
    arg1.setContentType("application/msword");
    }else if(result.getString("file_ext").equals("xls")||result.getString("file_ext").equals("xlsx")){
    arg1.setContentType("application/msexcel");
    }else if(result.getString("file_ext").equals("pdf")){
    arg1.setContentType("application/pdf");
    }
    arg1.setHeader("Content-Disposition","attachment; filename="+filename);
    byte[] bytesGot = result.getBytes(1);
    ServletOutputStream outs = arg1.getOutputStream();
    outs.write(bytesGot);
    outs.flush();
    outs.close();
    }
    }
    } catch (SQLException e) {
    e.printStackTrace();
    }
    return new ModelAndView();
    }
    }

通过Spring下载文件在Firefox中不起作用

FileController类

调用FileController类

3 个答案: