JSP导出Oracle数据表是一个在开发应用时的常用的操作，那么如何实现呢？现在开始我们的程序介绍，首先下面的程序expddl.jsp可导出Oracle数据表进行数据库的用户下的所有数据表的DDL.

JSP导出的Oracle数据表之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 dmd = (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()) {   对JSP导出的Oracle数据表进行取表名

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 rmd = (OracleResultSetMetaData) rs1.getMetaData();   对JSP导出的Oracle数据表提取取列总数

int colcnt = ormd.getColumnCount();   对JSP导出的Oracle数据表提取列序号

int num = 1;  for(int j=0;j﹤colcnt;j++) {  String s = ormd.getColumnTypeName(j+1).toLowerCase();   对Oracle数据表只处理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"))  ss = s + "(" + ormd.getColumnDisplaySize(j+1) + ")";  if(s.equals("number"))  ss = s + "(" + ormd.getPrecision(j+1) + "," + ormd.getScale(j+1) + ")";  %﹥  ﹤tr﹥  ﹤td width="40"﹥﹤div align="center"﹥﹤%= num++ %﹥﹤/div﹥﹤/td﹥  ﹤td width="98"﹥﹤%=ormd.getColumnName(j+1)%﹥﹤/td﹥﹤td width="144"﹥﹤%= s %﹥﹤/td﹥  ﹤td width="173"﹥ ﹤/td﹥ ﹤/tr﹥  ﹤%  }  }  rs1.close();  st.close();  %﹥  ﹤/table﹥  ﹤br﹥  ﹤%  }  rs.close();  conn.close();  %﹥  ﹤/div﹥    通过上面对JSP导出的Oracle数据表的操作，你是否对于这个程序的实现有了自己的思路呢？