//session.jsp
<%@ page contentType="text/html;charset=GB2312" %>
<HTML>
<BODY>
<P>
   <% String s=session.getId();
   %>
<P> sessionIDǣ
   <BR>  
   <%=s%>
<P>ӵtom.jsp
   <FORM action="tom.jsp" method=post name=form>
       <INPUT type="text" name="boy"> 
       <INPUT TYPE="submit" value="ͳ" name=submit>
  </FORM>  
</BODY>
</HTML>

tom.jsp
<%@ page contentType="text/html;charset=GB2312" %>
<HTML>
<BODY>
<P>Tomҳ
   <% String s=session.getId();
   %>
<P> TomҳеsessionIDǣ  
   <%=s%>
<P> ӣӵJerryҳ档
<A HREF="jerry.jsp"> 
 <BR>  ӭJerry
</A>   
</BODY>
</HTML>

jerry.jsp
<%@ page contentType="text/html;charset=GB2312" %>
<HTML>
<BODY>
<P>Jerryҳ
   <% String s=session.getId();
   %>
<P> JerryҳеsessionIDǣ  
   <%=s%>
<P> ӣӵsessionҳ档
<A HREF="session.jsp"> 
 <BR>  ӭsession
</A>   
</BODY>
</HTML>

16ͼ3.17ʾ
session.jsp
<%@ page contentType="text/html;charset=GB2312" %>
<HTML>
<BODY bgcolor=cyan>
<P> sessionIDǣ
   <% String s=session.getId();
      String str=response.encodeURL("tom.jsp");
   %>
<P> sessionIDǣ  
  <%=s%>
 <BR>
<P>URL:http://localhost:8080/tom.jspдϢǣ
   <%=str%>
  <FORM action="<%=str%>" method=post name=form>
       <INPUT type="text" name="boy"> 
       <INPUT TYPE="submit" value="ͳ" name=submit>
  </FORM>  
</BODY>
</HTML>

tom.jsp
<%@ page contentType="text/html;charset=GB2312" %>
<HTML>
<BODY bgcolor=pink>
<P>Tomҳ
   <% String s=session.getId();
     String str=response.encodeRedirectURL("jerry.jsp");
   %>
<P> TomҳеsessionIDǣ  
   <%=s%>
<P>URL:http://localhost:8080/jerry.jspдϢǣ
<BR>
<%=str%>
<P> ӣӵJerryҳ档
<A HREF="<%=str%>"> 
 <BR>ӭJerry
</A>   
</BODY>
</HTML>

jerry.jsp
<%@ page contentType="text/html;charset=GB2312" %>
<HTML>
<BODY bgcolor=pink>
<P>jerryҳ
   <% String s=session.getId();
     String str=response.encodeRedirectURL("session.jsp");
   %>
<P> jerryҳеsessionIDǣ  
   <%=s%>
<P>URL:http://localhost:8080/session.jspдϢǣ
<BR>
<%=str%>
<P> ӣӵsessionҳ档
<A HREF="<%=str%>"> 
 <BR>ӭsession
</A>   
</BODY>
</HTML>