Question

我遇到了问题，我不确定如何将所选选项保存到文件中。代码是什么：

<%@ page import="java.io.PrintWriter" %>
<%@ page import="java.time.LocalDateTime" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Combo box to file</title>
</head>
<body>
<%PrintWriter writer; %>
<select>
    <option value="Date">
        Current Date and Time
        <%
        writer = new PrintWriter("text.txt", "UTF-8");
        writer.println(LocalDateTime.now().toString());
        writer.close();
        %>
    </option>
    <option value="Text">
        Some Text
        <%
        writer = new PrintWriter("text.txt", "UTF-8");
        writer.println("Some text");
        writer.close();
        %>
    </option>
    <option value="Integer">
        An Integer
        <%
        writer = new PrintWriter("text.txt", "UTF-8");
        writer.println(123);
        writer.close();
        %>
    </option>
</select>
</body>
</html>

它没有做任何事情。我的猜测是代码没有被调用，但我对此非常陌生，不知道如何解决这个问题。

使用JSP将选定的选项从组合框保存到文件

0 个答案: