JSP实现论坛树型结构的具体算法_MySQL

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.io.*" %>
<%@ page import="java.sql.*" %>
<%
int intRowCount;
out.print("显示论坛树形结构");
out.print("

");
try {
String sql="select * from mybbslist order by rootid desc,depth,fid,bbsid";
ResultSet rs = mybbs.executeQuery(sql);
if (rs.next())
{
rs.last();
intRowCount=rs.getRow();
out.print("论坛树中有");
out.print(intRowCount);
out.print("个叶子节点");
rs.first();
int j=0;
int Depth = 0;
out.print("");
while(j{
int rsDepth=rs.getInt("Depth");
if (rsDepth{
for(int i=1;i{
out.print("");
}
}
rsDepth=rs.getInt("Depth");
if (rsDepth>Depth)
{
out.print("");
}
out.print("