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(); //在設定完編碼以後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();
        }