用JSP导出ORACLE的数据表DDL

这几天忙着整理搞ISO的文档，也不知道自己维护的数据库手册是否齐全，算了干脆写个程序全给导出来算了；）。下面的程序expddl.jsp可导出当前连接数据库的用户下的所有数据表的DDL.
EXPDDL.JSP:
<%@ page contentType="text/html; charset=gb2312" language="java" %>
<%@ page import = "java.sql.*" %>
<%@ page import = "oracle.jdbc.OracleDatabaseMetaData" %>
<%@ page import = "oracle.jdbc.OracleResultSetMetaData" %>
<%@ page import = "javax.sql.*,javax.naming.Context" %>
<%@ page import = "javax.naming.InitialContext" %>
<div align="center">
<%
DataSource ds = null;
Context ic = new InitialContext();
ds = (DataSource) ic.lookup("java:comp/env/jdbc/mydb");
Connection conn = ds.getConnection();
OracleDatabaseMetaData odmd = (OracleDatabaseMetaData) conn.getMetaData();
String us = odmd.getUserName();
String[] types = new String[1];
types[0] = "TABLE";
ResultSet rs = odmd.getTables(null,us,"%",types);
while(rs.next()) {
//取表名
String tname = rs.getString(3);
%>
<div align="center">表名：<%= tname%></div>
<table width="483" height="50" border="1" cellpadding="2" cellspacing="0">
<tr>
<td><div align="center">序号</div></td>
<td><div align="center">标识</div></td>
<td><div align="center">类型/精度</div></td>
<td><div align="center">标识说明</div></td>
</tr>
<%
Statement st = conn.createStatement();
ResultSet rs1 = st.executeQuery("select * from " + tname);
OracleResultSetMetaData ormd = (OracleResultSetMetaData) rs1.getMetaData();

补充：Jsp教程,Jsp/Servlet开发工具