应用Java技术开发WAP应用程序

我们采用Tomcat作为web服务器，如果你对如何使用tomcat还不熟悉请参考相关资料。通常我们开发WAP应用程序的时候都是手写wml脚本，其实我们可以借助java的Servlet/jsp技术开发WAP应用程序。通常我都是使用Lomboz插件在eclipse的环境下写servlet/jsp文件的。先看下面的waptest.jsp文件和WapServlet.java文件

＜?xml version="1.0"?＞

＜!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"

"http://www.wapforum.org/DTD/wml_1.1.xml"＞

＜%

response.setContentType("text/vnd.wap.wml");

out.println("＜wml＞");

out.println("＜card title="MobileDate"＞");

out.println(" ＜p align="center"＞");

out.println("Date and Time Service＜br/＞");

out.println("Date is: "+ new java.util.Date());

out.println("＜/p＞");

out.println("＜/card＞");

out.println("＜/wml＞");

%＞

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

{

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="MobileDate"＞");

out.println(" ＜p align="center"＞");

out.println("Date and Time Service＜br/＞");

out.println("Date is: " + new java.util.Date());

out.println("＜/p＞");

out.println("＜/card＞");

out.println("＜/wml＞");

}

protected void doPost(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException

{

doGet(request,response);

}

}

这两个文件实现的功能是一样的，显示服务器当前的时间。我们的web.xml的内容如下：

＜?xml version="1.0" ?＞

＜!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"＞

＜web-app＞

＜servlet＞

＜servlet-name＞WapServlet＜/servlet-name＞

＜servlet-calss＞com.j2medev.mingjava.WapServlet＜/servlet-class＞

＜/servlet＞

＜servlet-mapping＞

＜servlet-name＞WapServlet＜/servlet-name＞

＜url-pattern＞/wapservlet＜/url-pattern＞

＜/servlet-mapping＞

＜welcome-file-list＞

＜welcome-file＞index.jsp＜/welcome-file＞

＜/welcome-file-list＞

＜error-page＞

＜error-code＞404＜/error-code＞

＜location＞/error.jsp＜/location＞

＜/error-page＞

＜/web-app＞

使用Lomboz我们可以很方便的把这个应用程序发布到tomcat的webapps目录，通过WinWap我们可以直接通过下面两个URL访问到他们
http://localhost:8088/wap/wapservlet
http://localhost:8088/wap/waptest.jsp