JDBC连接Oracle数据库问题

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我在使用JDBC连接数据库,调试时出现如上所示

public ArrayList<Hashtable<String, String>> getList(String paramString) {

		ArrayList<Hashtable<String, String>> localArrayList = new ArrayList<Hashtable<String, String>>();

		try {

			this.conn = getConnection();

			this.stmt = this.conn.createStatement();



			ResultSet localResultSet = this.stmt.executeQuery(paramString);

			ResultSetMetaData localResultSetMetaData = localResultSet

					.getMetaData();

			int i = localResultSetMetaData.getColumnCount();

			while (localResultSet.next()) {

				Hashtable<String, String> localHashtable = new Hashtable<String, String>();

				for (int j = 1; j <= i; ++j) {

					String str1 = localResultSetMetaData.getColumnName(j);

					String str2 = localResultSet.getString(j);

					if (str2 == null)

						str2 = "";

					localHashtable.put(str1, str2);

				}

				localArrayList.add(localHashtable);

			}

			localResultSet.close();

			this.stmt.close();

			this.conn.close();

		} catch (SQLException localSQLException) {

			try {

				this.stmt.close();

				this.conn.close();

			} catch (Exception localException) {

			}

		}

		return localArrayList;

	}

，就是在this.stmt = this.conn.createStatement();这句话处出错，调用数据库连接的页面代码如下：

<%@page language="java" contentType="text/html;charset=gb2312"%>

<jsp:useBean id="db" class="xw.ConnDb" />

<jsp:useBean id="str" class="xw.StrManager" />

<jsp:useBean id="c_check" class="xw.ErrorCheck" />

<html>

	<head>

		<title>Cookie版 购物车</title>

		<style type="text/css">

		a {

			font-size: 12px;

			text-decoration: none;

		}

		table {font-size:12px;}

		#shop{border:5px solid #ccc;}

		@IMPORT url("Jash.css");

		</style>

		

	</head>

	<body>

		<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

			<TBODY>

				

				<%

					

					java.util.ArrayList<java.util.Hashtable<String,String>> rs = new java.util.ArrayList<java.util.Hashtable<String,String>>();

					rs = db.getList("select  PRID,NAME,CONTENT,PIC,XID,DID,BPRICE,SPRICE from a2009_shuhua_product");

					

					if (rs != null) {

						java.util.Hashtable<String,String> hash = new java.util.Hashtable<String,String>();

						for (int i = 0; i < rs.size(); i++) {

							hash = rs.get(i);

							String PRID = str.notEmpty(hash.get("PRID"));

							String SPRICE = str.notEmpty(hash.get("SPRICE"));

							String BPRICE = str.notEmpty(hash.get("BPRICE"));

							String NAME = str.notEmpty(hash.get("NAME"));

							String PIC = str.notEmpty(hash.get("PIC"));

				%>

				<%

					if (i == 0) {

				%>

				<TR>

					<%

						}

					%>

					<%

						if (i != 0 && i % 4 == 0) {

					%>

				</TR>

				<TR>

					<%

						}

					%>

					<TD height=80>

						<TABLE cellSpacing=1 cellPadding=2 width=155 align=center border=0>

							<TBODY>

								<TR>

									<TD align=middle>

										<A href="iteminfo.jsp?prid=<%=PRID%>" target=_blank><IMG

												height=120 src="<%=PIC%>" width=120 border=0 id="shop">

										</A>

									</TD>

								</TR>

								<TR>

									<TD>

										<IMG style="CURSOR: hand"

											onclick="centerNewWin('/iteminfo.jsp?prid=<%=PRID%>', '4444', 900, 650)"

											src="images/icon_mag.gif" align=absMiddle>

										<A href="iteminfo.jsp?prid=<%=PRID%>" target=_blank><%=NAME%></A>

										<BR>

										<SPAN class=red><BR>

											<IMG src="images/icon_won.gif" align=absMiddle vspace=2> <%=SPRICE%>

											<BR>

											<IMG src="images/icon_point_s.gif" align=absMiddle vspace=2> <%=BPRICE%> <!--<img src="/images_china/icon_nointerest_s.gif" vspace="2" align="absmiddle"> 0 -->

										</SPAN>

									</TD>

								</TR>

							</TBODY>

						</TABLE>

					</TD>

					<TD bgColor=#e3e3e3>

						<IMG height=1 src="images/blank.gif" width=1>

					</TD>

					<%

						if (i == 0 && i % 4 != 0) {

					%>

					<TD width=35>

						    

					</TD>

					<%

						}

					%>

					<%

						hash = null;

							}

							hash = null;

						}

						rs = null;

					%>

				

				<TR>

					<TD colSpan=8 height=10>

						 

					</TD>

				</TR>

				<TR>

					<TD class=linetable width="100%" colSpan=8 height=1></TD>

				</TR>

				<TR>

					<TD colSpan=8 height=10>

						 

					</TD>

				</TR>





			</TBODY>

		</TABLE>

	</body>

</html>

，大家有没有遇见过这种情况？大侠们，我是刚刚学习Java Web开发，希望大家可以帮我一下。