主要有这三行代码就可以了。
request.setCharacterEncoding("utf-8");
response.setHeader("Content-type", "text/html;charset=UTF-8");
response.setCharacterEncoding("utf-8");
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setHeader("Content-type", "text/html;charset=UTF-8");
response.setCharacterEncoding("utf-8");
SpdDao dao=new SpdDaoImpl();
List<Spd> list=dao.getAllSpds();
// json
Gson gson=new Gson();
if(list!=null){
String json = gson.toJson(new returnJson(true,"OK",list));
PrintWriter out = response.getWriter();
out.print(json);
}else{
String json = gson.toJson(new returnJson(false,"ERROR"));
PrintWriter out = response.getWriter();
out.print(json);
}