应用Java技术开发WAP应用程序
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Tomcat入门指南。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-nameWapServlet</servlet-name
<servlet-calsscom.j2medev.mingjava.WapServlet</servlet-class
</servlet
<servlet-mapping
<servlet-nameWapServlet</servlet-name
<url-pattern/wapservlet</url-pattern
</servlet-mapping
<welcome-file-list
<welcome-fileindex.jsp</welcome-file
</welcome-file-list
<error-page
<error-code404</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