js jsp 参数

<!-- 前端JavaScript -->
<script>
  function navigateToPage() {
    var param = "value";
    window.location.href = "page.jsp?param=" + encodeURIComponent(param);
  }
</script>

<!-- 后端JSP -->
<%
  String param = request.getParameter("param");
  out.println("Received parameter: " + param);
%>

<!-- 前端HTML -->
<form action="submit.jsp" method="post">
  <input type="text" name="param" value="value">
  <input type="submit" value="Submit">
</form>

<!-- 后端JSP -->
<%
  String param = request.getParameter("param");
  out.println("Received parameter: " + param);
%>

<!-- 前端JavaScript -->
<script>
  function sendAjaxRequest() {
    var param = "value";
    fetch('ajax.jsp?param=' + encodeURIComponent(param))
      .then(response => response.text())
      .then(data => console.log(data));
  }
</script>

<!-- 后端JSP -->
<%
  String param = request.getParameter("param");
  out.println("Received parameter: " + param);
%>

<!-- 设置Session属性 -->
<%
  session.setAttribute("param", "value");
%>

<!-- 获取Session属性 -->
<%
  String param = (String) session.getAttribute("param");
  out.println("Received parameter: " + param);
%>