思路:一个form表单,用户提交留言
一个页面显示留言内容。用到Vector来存取信息并显示
cas.jsp
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<body> <form action= "fei.jsp" >
留言人: <input type= "text"
name= "name" /><br/>
标题:<input type= "text"
name= "title" /><br/>
留言内容:<br/>
<textarea rows= "6"
cols= "40"
name= "message" ></textarea>
<br/>
<input type= "submit"
value= "提交" />
</form>
</body>
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fei.jsp
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<body> <%
String name=request.getParameter( "name" );
String a= new
String(name.getBytes( "ISO-8859-1" ), "gb2312" );
String title=request.getParameter( "title" );
String b= new
String(title.getBytes( "ISO-8859-1" ), "gb2312" );
String message=request.getParameter( "message" );
String c= new
String(message.getBytes( "ISO-8859-1" ), "gb2312" );
Vector v=(Vector)application.getAttribute( "v" );
if (v== null ){
v= new
Vector();
}
String time=( new
Date()).toLocaleString();
String s=a+ "#" +b+ "#" +c+ "#" +time; //这里的”#“符号不能多写,否则会多出一列来
v.add(s);
application.setAttribute( "v" ,v);
if (name== null ||name.equals( "" )){
name= "guess" +( int )(Math.random()* 1000 );
}
out.print( "<table border=‘1‘>" );
out.print( "<tr><th>留言人</th><th>标题</th><th>留言内容</th><th>留言时间</th></tr>" );
for ( int
i= 0 ;i<v.size();i++){
out.print( "<tr>" );
String st=(String)v.elementAt(i);
String ss[]= st.split( "#" );
for ( int
j= 0 ;j<ss.length;j++){
out.print( "<td>" +ss[j]+ "</td>" );
}
out.print( "</tr>" );
}
%>
</body>
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