jsp页面获取servlet传递的参数，出现乱码的解决方法

在servlet中，用 

request.setAttribute("field",field);
   request.setAttribute("value",value);
   
   RequestDispatcher requestDispatcher = request.getRequestDispatcher("userinfo.jsp");
   requestDispatcher.forward(request, response);
  的方式传递参数到userinfo.jsp

乱码的解决方法：

1.request.setCharacterEncoding("gb2312");
  response.setCharacterEncoding("gb2312");

2.设置tomcat下，server.xml的编码

3.request.setCharacterEncoding("gb2312");
  response.setCharacterEncoding("gb2312");
  PrintWriter out = response.getWriter();

 顺序不可变……