request.setEncoding() ----不行
new String(request.getParameter("").getBytes(),"GBK");----不行
contentType: "application/x-www-form-urlencoded; charset=GBK", ----不行
request.setEncoding() ----不行
new String(request.getParameter("").getBytes(),"GBK");----不行
contentType: "application/x-www-form-urlencoded; charset=GBK", ----不行