如何将 scriptlet 值从 JSP 传递到 Servlet [重复]

Question

我正在尝试开发简单的购物车应用程序。所以我在 Derby DB 中有简单的数据库表。从那里我将数据检索到 JSP 中的表中。现在我想将该值传输到 servlet。这是我的部分代码：

ItemList.JSP

<%
String id = request.getParameter("userId");
String driverName = "org.apache.derby.jdbc.EmbeddedDriver";
String connectionUrl = "jdbc:derby://localhost:1527/";
String dbName = "CartDB";
String userId = "aaa";
String password = "aaa";
try {
Class.forName(driverName);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Connection connection = null;
Statement statement = null;
ResultSet resultSet = null;
%>
<table id="customers">
<%
try{
connection = DriverManager.getConnection(connectionUrl+dbName, userId, password);
statement=connection.createStatement();
String sql ="SELECT * FROM electronics_catagory";
resultSet = statement.executeQuery(sql);
while(resultSet.next()){
%>
<tr>
<td class="white">
<img src="<%=resultSet.getString("image") %>" style="width:300px;height:230px;" alt="product image">
</td>
<td class="white">
Product Name : <%=resultSet.getString("name")%><br>
<span class="smallText">Description : <%=resultSet.getString("description") %></span>
</td>
<td class="white">price <br/> <%=resultSet.getString("price") %></td>
<td class="white">Required QTY : <br> <input type="text" name="qty"></td>
<td class="white">
<form action="#" method="post">
<button class="button"><span>Add to WishList</span></button>
</form>
</td>
</tr>
<%
}
} catch (Exception e) {
e.printStackTrace();
}
%>
</table>

所以有人知道如何将这些值（例如：-<%= resultSet.getString("price") %>）传递给 servlet？

Answer 1

如果你的 servlet 映射到你的 doGet 上，你可以这样做（没有表单）：

<a class="button" href="../YourServletUrl?price=<%=resultSet.getString("price") %>"><span>Add to WishList</span></a>

然后在你的servlet的doGet方法中，像平常获取任何表单参数一样获取它：

String price = request.getParameter("price");