使用从客户端传过来的HttpServletRequest request
获得客户端与服务器的相关信息。
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.security.Principal;
import java.util.Locale;
public class haunJingServlet extends HttpServlet {
// 返回客户端浏览器接受的文件类型
private String getAccept(String accept){
StringBuffer buffer = new StringBuffer();
if(accept.contains("image/gif")){
buffer.append("Gif文件,");
}
if(accept.contains("image/x-xbitmap")){
buffer.append("BMP文件,");
}
if(accept.contains("iamge/jpeg")){
buffer.append("JPG文件,");
}
if(accept.contains("application/vnd.ms-excle")){
buffer.append("Excle文件,");
}
if(accept.contains("application/vnd.ms-powerpoint")){
buff