现在很多人开发wml的应用了，但它们毕竟都是些静态的内容。如果我们要开发和服务器交互的功能呢？答案当然是我们可以使用Servlet技术。
看下面的例子：<?xml version='1.0'?><DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml"> <wml> <card id="Order" title="Query Inventory"> <p> <select name="Items" title="Items"> <option value="Books">Books</option> <option value="Music">Music</option> <option value="Video">Video</option> <option value="Software">Software</option> </select> </p> <do type="accept" label="Query"> <go href="http://localhost:8080/ewap/wapservlet" method="get"> <postfield name="Items" value="$(Items)"/> </go> </do> </card> </wml>用户可以从列表中选择Item,通过无线网络传输给服务器后Servlet通过request.getParameter()方法得到用户的选择并发送给用户，servlet的代码如下：package com.j2medev.mingjava;
import java.io.IOException;import java.io.PrintWriter;
import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;
public class WapServlet extends HttpServlet{
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String select = request.getParameter("Items"); response.setContentType("text/vnd.wap.wml"); PrintWriter out = response.getWriter(); out.println("<?xml version=/"1.0/"?>"); out.println("<!DOCTYPE wml PUBLIC/"-//WAPFORUM//DTD WML 1.1//EN/""); out.println("/"http://www.wapforum.org/DTD/wml_1.1.xml/">"); out.println("<wml>"); out.println("<card title=/"test/">"); out.println(" <p align=/"center/">"); out.println("you selected "+select); out.println("</p>"); out.println("</card>"); out.println("</wml>");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); }}
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