request.setCharacterEncoding("utf-8");
//获取文件名
String filename=request.getParameter("filename");
//下载文件需要相应头
response.addHeader("content-Type","application/octet-stream");
String agent=request.getHeader("User-Agent");
if(agent.toLowerCase().indexOf("firefox")!=-1) {
//ff防止乱码的问题 给文件名加上前缀和后缀
response.addHeader("content-Disposition", "attachment;filename=?UTF-8?B?"+new String(Base64.encodeBase64(filename.getBytes("UTF-8")))+"?=");
}else {
//edge防止乱码 URLEncoder.encode(filename,"utf-8")
response.addHeader("content-Disposition", "attachment;filename="+URLEncoder.encode(filename,"utf-8"));//filename包含了文件的后缀
}
//servlet通过文件地址,将文件转化为输入流,读到servlet去
InputStream in=getServletContext().getResourceAsStream("/2580.jpg");
//产生一个输出流
ServletOutputStream out=response.getOutputStream();
byte[] bs=new byte[10];
int len=-1;
while((len=in.read(bs))!=-1) {
out.write(bs,0,len);
}
out.close();
Javaweb文件下载的源码,以及对应于各个浏览器的乱码的问题的解决方案
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转载自blog.csdn.net/weixin_43878297/article/details/88877795
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