jdbc操作数据库并自动获取字段类型

//获取改功能编码的关联功能

public void getLinkdb(String gnbianma){


PreparedStatement pstmt = null;


ResultSet rs = null;


Connection conn = null;


/**


select * from SY_FUNC          fc   where fc.func_code ='SY_FUNC'         --功能定义


select * from SY_FORM_LINK     FLK    where FLK.main_func_code='SY_FUNC'  --关联功能

**/


String strSql =" select * from SY_FORM_LINK  FLK where FLK.main_func_code in "


 +" ( select FLK.Main_Func_Code from SY_FORM_LINK FLK where FLK.main_func_code=? ) ";


List<HashMap<String, Object>> stepLists = new ArrayList<HashMap<String, Object>>();


HashMap<String, Object> map =null;


try {


conn = DbUtil.getConnection();


pstmt = conn.prepareStatement(strSql);


pstmt.setString(1, gnbianma);


rs = pstmt.executeQuery();


ResultSetMetaData rsmd;


while (rs.next()){


map = new HashMap<String, Object>();


rsmd = (ResultSetMetaData) rs.getMetaData();


for (int i = 1; i <= rsmd.getColumnCount(); i++) {


map.put(rsmd.getColumnName(i), rs.getObject(i));


}


stepLists.add(map);


}


rs.close();


}catch (SQLException e) {


e.printStackTrace();


}finally {


DbUtil.close(pstmt);


DbUtil.close(conn);


}


System.out.println(stepLists.size());

}