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我想讓java servlet根據輸入做一些類似於while-do的情況。假設我讓它接收名爲UserInput的輸入並連續發佈名爲ProgramOutput的輸出,就像與程序聊天一樣。這是我的doPost代碼:java servlet重複發佈
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
String UserInput= request.getParameter("UserInput").toString();
out.println("<html>");
out.println("<head>");
out.println("<title></title>");
out.println("</head>");
out.println("<body>");
while (true){
out.println(UserInput+ "<br>"); //this is the place where user type his/her words
out.println("<input type='submit' value='submit'>");
request.getParameter("UserInput").toString();
if ("stop".equals(UserInput)) //unless user type 'stop', program will keep printing the answer
break;
String ProgramOutput= engine.answer(UserInput); //from engine.java
out.println(ProgramOutput+"<br>");}
out.println("</body>");
out.println("</html>");
out.close();
當我試圖運行它,它從未停止打印相同的輸入和輸出,甚至沒有給用戶鍵入另一個詞,並檢查它。我該怎麼辦?
對不起,這是我第一次製作servlet,如果可能我想要一個容易理解的答案。提前致謝。