application1.jsp

机械工业出版社的《jsp2.0动态网站开发实例指南》的源代码

<!--application1.jsp-->
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.util.*"%>
<%!
	public String codeString(String s){
		String str=s;
                try{
			byte b[]=str.getBytes("ISO-8859-1");
			str=new String (b);
			return str;
		}catch(Exception e){
		return "error";
		}
	}
%>
<%response.setHeader("Refresh","5");%>
<%
	Vector messages;
	messages=(Vector)application.getAttribute("messages");
	if(messages==null){
		messages=new Vector();
	}
	else{
		String userName=request.getParameter("userName");
		String message=request.getParameter("message");
		if(!(userName==null)&&!(userName.equals(""))){
			userName=codeString(userName);
			message=codeString(message);
			message=userName+"说道:"+message;
			messages.add(message);
		}
		Object[] messagesnew=messages.toArray();
		int messagesnum=messagesnew.length;
		int i;
		for(i=0;i<messagesnum;i++){
			out.println((String)messagesnew[i]);
			out.println("<br>");
		}
		if(messagesnum>15){
			messages.clear();
			messages.add(messagesnew[13]);
			messages.add(messagesnew[14]);
			messages.add(messagesnew[15]);
		}
	}
	application.setAttribute("messages",messages);
%>