在Servlet中出現一個輸出中文亂碼的問題，已經解。  @Override public void doPost(HttpServletRequest reqeust, HttpServletResponse response)    throws ServletException, IOException {        //PrintWriter out = response.getWriter();在還沒有給response指定編碼格式時就獲取了他的輸出流，所以一直亂碼    reqeust.setCharacterEncoding("utf-8");   response.setContentType("text/html;charset=utf-8");   response.setCharacterEncoding("utf-8");   PrintWriter out = response.getWriter(); //在設置完編碼以后在獲取輸出流就好了。   jsonService = new JsonService();   String jsonString = JsonTools.createJsonString("persons", jsonService.getPersonList());   out.println(jsonString);   out.flush();   out.close();   }