我能够使用servlet来完成以下简单示例，以根据产品类别获取产品名称。您需要对其进行一些修改以适合您的特定方案。让我知道这是否有帮助并使您走上正确的道路…
HTML页面：
<html> <head> <script SRC="jquery.js" TYPE="text/javascript"></script> </head> <body> <p> <label for="pcategory">Product Category</label> <select name="pcategory" id="pcategory" size="0"> <option value="1">Category 1</option> <option value="2">Category 2</option> <option value="3">Category 3</option> </select> </p> <p> <label for="pname">Product Name:</label> <select name="state" id="state"> <option value="1">Product Name 1 For Category 1</option> <option value="2">Product Name 2 For Category 1</option> <option value="3">Product Name 3 For Category 1</option> </select> </p> </body> <script type="text/javascript"> $category = $('#pcategory'); $category.change ( function() { $.ajax({ type: "GET", url: "GetProductName", data: {category: $category.attr("selectedIndex") }, success: function(data){ $("#state").html(data) } }); } ); </script></html>servlet将为您提供产品名称…
import java.io.*;import javax.servlet.ServletException;import javax.servlet.http.*;public class GetProductName extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); try { int category = Integer.parseInt(request.getParameter("category")); switch (category) { case 1:out.print( "<option value='1'>Product Name 1 For Category 2</option>" + "<option value='2'>Product Name 2 For Category 2</option>" + "<option value='3'>Product Name 3 For Category 2</option>" ); break; case 2:out.print( "<option value='1'>Product Name 1 For Category 3</option>" + "<option value='2'>Product Name 2 For Category 3</option>" + "<option value='3'>Product Name 3 For Category 3</option>" ); break; default: out.print( "<option value='1'>Product Name 1 For Category 1</option>" + "<option value='2'>Product Name 2 For Category 1</option>" + "<option value='3'>Product Name 3 For Category 1</option>" ); break; } } catch (Exception ex) { out.print("Error getting product name..." + ex.toString()); } finally { out.close(); } }}
