应用Java技术开发WAP应用程序

来源：作者：出处：巧巧读书 2006-02-26 进入讨论组

我们还是采用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
"); 
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
"); 
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