解决提交数据的乱码

//解决GET提交乱码
String s=new String(user.getUsername()[0].getBytes("iso8859-1"),"UTF-8");

//解决POST提交乱码
request.setCharacterEncoding("UTF-8");

servlet中赋值

request.setAttribute("data", "hello");
request.getRequestDispatcher("/index.jsp").forward(request, response);

index.jsp 中取值

<form>
<%

String data = (String) request.getAttribute("data");
out.write(data);
%>
</form>

//包含页面

request.getRequestDispatcher("/index.jsp").include(request, response);
response.getWriter().write("12");
request.getRequestDispatcher("/index.jsp").include(request, response);

//通过referer防盗链

String referer = request.getHeader("referer");