我想规定下载所有文件类型...有没有办法在 jsp 中下载任何文件格式...
我的代码片段:
String filename = (String) request.getAttribute("fileName");
response.setContentType("APPLICATION/OCTET-STREAM");
String disHeader = "Attachment";
response.setHeader("Content-Disposition", disHeader);
// transfer the file byte-by-byte to the response object
File fileToDownload = new File(filename);
response.setContentLength((int) fileToDownload.length());
FileInputStream fileInputStream = new FileInputStream(fileToDownload);
int i = 0;
while ((i = fileInputStream.read()) != -1) {
out.write(i);
}
fileInputStream.close();
如果我将 setContentType 指定为 APPLICATION/OCTET-STREAM，将下载 pdf、文本、doc 文件....但问题在于图像文件...
图像文件有什么问题？我想下载所有图像文件类型...
我搜索了类似的问题，但找不到合适的答案... 谢谢...
最佳答案
最后我以某种方式设法做到了...... 问题出在 JSP 的“Out.write”，它不能写入字节流...
我用 servlet 替换了 jsp 文件...
代码片段是:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
String filename = (String) request.getAttribute("fileName");
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition",
"attachment;filename="+filename);
File file = new File(filename);
FileInputStream fileIn = new FileInputStream(file);
ServletOutputStream out = response.getOutputStream();
byte[] outputByte = new byte[(int)file.length()];
//copy binary contect to output stream
while(fileIn.read(outputByte, 0, (int)file.length()) != -1)
{
out.write(outputByte, 0, (int)file.length());
}
}
现在我可以下载所有类型的文件....
感谢您的回复:)
关于java - 在jsp中下载任何文件格式的内容类型应该是什么？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13678094/