如何在带有下一步和后退按钮的JSP之间移动？

<!-- page1.jsp -->
<form action="process.jsp" method="post">
  <input type="hidden" name="page" value="page1">
  <!-- 页面1的内容 -->
  <input type="submit" value="下一步">
</form>

<!-- page2.jsp -->
<form action="process.jsp" method="post">
  <input type="hidden" name="page" value="page2">
  <!-- 页面2的内容 -->
  <input type="submit" value="下一步">
  <input type="submit" value="后退">
</form>

<!-- process.jsp -->
<%
  String page = request.getParameter("page");
  if ("page1".equals(page)) {
    // 处理页面1的逻辑
    response.sendRedirect("page2.jsp");
  } else if ("page2".equals(page)) {
    // 处理页面2的逻辑
    String action = request.getParameter("action");
    if ("next".equals(action)) {
      response.sendRedirect("page3.jsp");
    } else if ("back".equals(action)) {
      response.sendRedirect("page1.jsp");
    }
  }
%>