response.setContentType("text/html;charset=utf-8");
PrintWriter out=response.getWriter();
out.print("<script language='javascript'>alert('登录已失效请重新登陆');window.location.href='welcome.jsp';</script>");
response.setContentType("text/html;charset=utf-8");
PrintWriter out=response.getWriter();
out.print("<script language='javascript'>alert('登录已失效请重新登陆');window.location.href='welcome.jsp';</script>");