troisième emploi jsp

main.jsp

<% @ Page language = " java " import = " java.util. * " PageEncoding = " utf-8 " %> 


<! DOCTYPE HTML PUBLIC "- // W3C // DTD HTML 4.01 Transitional // EN" > 
< html > 
  < tête > 
  
  </ tête > 
  
  < body > 
    < jsp: include la page = "circle.jsp" flush = "true" > 
    < jsp: param   nom = "rayon"
    jsp: include > 
    < br > 
    < jsp: include la page = "ladder.jsp" > 
    < jsp: param valeur = "2" nom = "shang" /> 
    < jsp: param valeur = "2" nom = "xia" / > 
    < jsp: param valeur = "2" nom = "gao" /> 
    </ jsp: include > 
  </ body > 
</ html >

circle.jsp

<% @ Page language = " java " import = " java.util. * " PageEncoding = " utf-8 " %> 


<! DOCTYPE HTML PUBLIC "- // W3C // DTD HTML 4.01 Transitional // EN" > 
< html > 
  < tête > 
  < title > Page à partir de mon JSP 'de circle.jsp' </ title > 
  </ tête > 
  
  < body > 
   <% 
  chaîne a = demande.);
  deux b = Double .parseDouble (a);
  double - PI = 3,14 ; 
  out.print ( " 圆面积: " + (PI * b * b));
   %> 
   
   
   
  </ Body > 
</ html >

ladder.jsp

<% @ Page language = " java " import = " java.util. * " PageEncoding = " utf-8 " %> 


<! DOCTYPE HTML PUBLIC "- // W3C // DTD HTML 4.01 Transitional // EN" > 
< html > 
  < tête > 
   
  </ tête > 
  
  < body > 
   <% 
  chaîne a = request.getParameter ( " shang " );
  Chaîne b = demande.);
  Chaîne c = request.getParameter ( " gao " );
  deux d = Double .parseDouble (a);
  à double e = Double .parseDouble (b);
  double - f = Double .parseDouble (c); 
  out.print ( " 梯形面积: " + ((d + e) * f / 2 ));
   %> 
  </ Body > 
</ html >