import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 编码下载
*/
public class DownloadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//获取下载文件的名称
String filename=request.getParameter("name");
//上下文
ServletContext context=getServletContext();
//1.设置文件的mimeType类型
String mimeType=context.getMimeType(filename);
response.setContentType(mimeType);
//2.设置下载的头信息
response.setHeader("content-disposition", "attachment;filename"+filename);
//3.提供流
//源
InputStream is=context.getResourceAsStream("/download/"+filename);
//目的
ServletOutputStream sos=response.getOutputStream();
int len=-1;
byte[] buf=new byte[1024];
while((len=is.read(buf))!=-1){
sos.write(buf, 0, len);
}
sos.close();
is.close();
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
servlet编码下载文件
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转载自blog.csdn.net/weixin_42735880/article/details/82945604
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