Jsp for Loop

Jsp can also use the for statement to loop the output content. The use of for and if makes the program flow more flexible.
To achieve the following results:
<% @ Page language = "java" import = "net. abjy. fts. util. *, java. SQL. *" pageEncoding = "UTF-8" %>
<% @ Include file = "/WEB-INF/manager/head. jsp" %>
<Link href = "style/style.css" rel = "stylesheet" type = "text/css">
<Link href = "style/lhgdialog.css" rel = "stylesheet" type = "text/css">
<Link href = "style/systemsetting.css" rel = "stylesheet" type = "text/css">
<%
String username = request. getParameter ("username ");
DataOperator db = new DataOperator ();
String SQL = "select * from" + username + "";
ResultSet r = db.exe cuteQuery (SQL );
%>
<DIV id = navbar> <UL> <LI> & nbsp; <a href = "content. action "> homepage </a> System Management> User Management> modify user information </LI> </UL> </DIV>
<FORM id = "update" name = "update" action = "" method = "post">
<TABLE class = ObjectRegisterPage>
<THEAD>
<TR> <TD colSpan = 2> </TD> </TR>
</THEAD>
 
<COLGROUP>
<COL style = "WIDTH: 50%">
<COL style = "WIDTH: 50%; TEXT-ALIGN: left">
</COLGROUP>
<TBODY>
 
<TR>
<TH> <FONT color = red> * </FONT> User Name (the user name cannot be modified): & nbsp; </TH>
<TD> & nbsp; <INPUT class = input_blue size = "15" value = "username" id = "username" name = "username" readonly = "readonly"> </TD>
</TR>
<%
While (r. next ()){
ResultSetMetaData data = r. getMetaData ();
%>
<%
For (int I = 1; I <= data. getColumnCount (); I ++ ){

String columnname = data. getColumnName (I );
String columnvalue = r. getString (I );
%>
 
<TR>
<TH> <FONT color = red> * </FONT> Field Names and values: <% = columnname %> & nbsp; </TH>
<TD> & nbsp; <INPUT type = "password" class = input_blue value = "<% = columnvalue %>" id = "userpas" name = "userpas"> </TD>
</TR>
<%
}
%>
<%
}
%>
<TR>
<TD class = table_button colSpan = 2>
<INPUT class = "Button_blue" onclick = "update. submit ();" type = button value = "modify"> & nbsp;
<INPUT class = "Button_blue" onclick = "location = 'user. action'" type = button value = "return">
</TD>
</TR>
 
</TBODY>
</TABLE>
<% @ Include file = "/WEB-INF/manager/footer. jsp" %>