jsp输出金字塔的简单实例

<% 
  String str = "";
  for(int i = 1; i <= 5; i  ){
    for(int j = 1; j <= 5-i; j  ){
      str  ="&nbsp;&nbsp;&nbsp;&nbsp;";
    }
    for(int k = 1; k <= 2*i-1; k  ){
      str  ="☆";
    }
    str  ="<br>";
}
%>
<%= str %>