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用JSP导出ORACLE的数据表DDL
摘要: 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" %>
<%
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);
%>
表名：<%= tname%>
<table width="483" height="50" border="1" cellpadding="2" cellspacing="0">
<tr>
<td>
序号
</td><td>
标识
</td><td>
类型/精度
</td><td>
标识说明
</td></tr>
<%
Statement st = conn.createStatement();
ResultSet rs1 = st.executeQuery("select * from " + tname);
OracleResultSetMetaData ormd = (OracleResultSetMetaData) rs1.getMetaData();
//取列总数
int colcnt = ormd.getColumnCount();
//列序号
int num = 1;
for(int j=0;j
//只处理varchar2 char date number类型(根据需要添加相应的处理)
if(s.equals("varchar2") || s.equals("char") || s.equals("date") || s.equals("number")) {
if(s.equals("varchar2") || s.equals("char"))
s = s + "(" + ormd.getColumnDisplaySize(j+1) + ")";
if(s.equals("number"))
s = s + "(" + ormd.getPrecision(j+1) + "," + ormd.getScale(j+1) + ")";
%>
<tr>
<td width="40">
<%= num++ %>
</td><td width="98"><%=ormd.getColumnName(j+1)%></td><td width="144"><%= s %></td>
<td width="173"> </td> </tr>
<%
}
}
rs1.close();
st.close();
%>
</table>
<%
}
rs.close();
conn.close();
%>