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画面遷移せずにHTMLで値を送る方法

画面遷移せずにGETで値を送る方法のメモです。

HTMLで値をGET送信

a href="URL?属性名="値"

<body>
<a href="TestServlet?action=sample"></a>
</body>

Javaで値を受け取る

request.getParameter("属性名")
sは文字列「sample」を受け取ります。

protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

            String s = request.getParameter("action");
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