提供一个页面，页面上有四个下载按钮，我任意点一个，都能下载一个不一样的文件。
@WebServlet("/downloadServlet")
public class DownloadServlet extends HttpServlet{
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String xiazai = req.getParameter(“xiazai”);
if (xiazai.equals(“下载1”)) {
xiazai1(req, resp);
}else if (xiazai.equals(“下载2”)) {
xiazai2(req, resp);
}else if (xiazai.equals(“下载3”)) {
xiazai3(req, resp);
}else {
xiazai4(req, resp);
}
}
private void xiazai1(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setHeader("content-disposition", "attachment;filename="+new String("美女.jpg".getBytes("utf-8"),"iso-8859-1"));
req.getRequestDispatcher("1.jpg").forward(req, resp);
}
private void xiazai2(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setHeader("content-disposition", "attachment;filename="+new String("如云.jpg".getBytes("utf-8"),"iso-8859-1"));
req.getRequestDispatcher("bt1.jpg").forward(req, resp);
}
private void xiazai3(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setHeader("content-disposition", "attachment;filename="+new String("测试.jpg".getBytes("utf-8"),"iso-8859-1"));
req.getRequestDispatcher("bt2.jpg").forward(req, resp);
}
private void xiazai4(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setHeader("content-disposition", "attachment;filename="+new String("文件.jpg".getBytes("utf-8"),"iso-8859-1"));
req.getRequestDispatcher("bt3.jpg").forward(req, resp);
}
}