sprintmvc+ibatis+oracle无法插入clob字段的问题

客户提供的代码框架
其中使用的有：ibatis-2.3.4.726.jar、ojdbc6.jar、classes12.jar
问题描述如下
当请求第三方做交易操作时，第三方会将交易的报文返回，我需要将请求的报文与返回的报文保存到表中。当报文较少的时候，能正常插入。但当报文比较大的时候，则无法进行插入操作。
异常信息如下

17:28:54,733 INFO  [XmlBeanDefinitionReader] Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]

17:28:54,906 INFO  [SQLErrorCodesFactory] SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]

17:29:07,084 ERROR [STDERR] org.springframework.jdbc.UncategorizedSQLException: SqlMapClient operation; uncategorized SQLException for SQL []; SQL state [null]; error code [17070];   

--- The error occurred in com/upic/pay/biz/bo/sql/TradeMessagesSql.xml.  

--- The error occurred while applying a parameter map.  

--- Check the tradeMessages.insert-InlineParameterMap.  

--- Check the parameter mapping for the 'requestXml' property.  

--- Cause: java.sql.SQLException: 数据大小超出此类型的最大值: 3539; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:   

--- The error occurred in com/upic/pay/biz/bo/sql/TradeMessagesSql.xml.  

--- The error occurred while applying a parameter map.  

--- Check the tradeMessages.insert-InlineParameterMap.  

--- Check the parameter mapping for the 'requestXml' property.  

--- Cause: java.sql.SQLException: 数据大小超出此类型的最大值: 3539

环境大致描述如下：
oracle中有一张交易报文的表，其中包括请求与返回两个字段是clob类型。存放XML类型的数据。
主要的字段如下

       BIZ_NO =  #bizNo:VARCHAR#,

	SERIALIZE_NO =  #serializeNo:VARCHAR#,

	RESPONSE_XML =  #responseXml:CLOB#,

	REQUEST_XML =  #requestXml:CLOB#,

	INTERACTIVE_TIME =  #interactiveTime:DATE#,

	INTERACTIVE_TYPE =  #interactiveType:VARCHAR#,

	CHANNEL_TYPE =  #channelType:VARCHAR#,

	TRADE_TYPE =  #tradeType:VARCHAR#,

java对象主要属性如下：geter，seter方法略

	private String messageId;

	private String bizNo;

	private String serializeNo;

	private String responseXml;

	private String requestXml;

	private Date interactiveTime;

	private String interactiveType;

	private String channelType;

	private String tradeType;

ibatis的配置主要点如下
dao-context.xml

 

  <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">

        <property name="configLocation" value="com/upic/pay/biz/bo/sql/sql-map-config.xml" />

        <property name="dataSource" ref="dataSource" />

        <property name="lobHandler" ref="lobHandler" />

    </bean>



  <bean id="lobHandler" class="org.springframework.jdbc.support.lob.DefaultLobHandler" lazy-init="true"/>

sql-map-config.xml

<sqlMapConfig>

  <settings

    cacheModelsEnabled="true"

    enhancementEnabled="true"

    lazyLoadingEnabled="true"

    maxSessions="3000"

    maxTransactions="3000"

    maxRequests="3000"/>

   

   <typeHandler jdbcType="CLOB" javaType="java.lang.String" callback="org.springframework.orm.ibatis.support.ClobStringTypeHandler" />

</sqlMapConfig>

插入部分的sql如下

<insert id="tradeMessages.insert" parameterClass="com.upic.pay.domain.TradeMessages">

		<![CDATA[   

		insert into T_PAY_TRADE_MESSAGES

		(

			MESSAGE_ID,	

			BIZ_NO,	

			SERIALIZE_NO,	

			RESPONSE_XML,	

			REQUEST_XML,	

			INTERACTIVE_TIME,	

			INTERACTIVE_TYPE,	

			CHANNEL_TYPE,	

			TRADE_TYPE,	

			CREATED_BY,	

			CREATED_DATE,	

			UPDATED_BY,	

			UPDATED_DATE	

			,DELETED_FLAG

		)

		values

		(

		   #messageId:VARCHAR#,

		   #bizNo:VARCHAR#,

		   #serializeNo:VARCHAR#,

		   #responseXml,javaType=java.lang.String,jdbcType=CLOB#,

		   #requestXml,javaType=java.lang.String,jdbcType=CLOB#,

		   #interactiveTime:DATE#,

		   #interactiveType:VARCHAR#,

		   #channelType:VARCHAR#,

		   #tradeType:VARCHAR#,

		   #createdBy:VARCHAR#,

			sysdate,

		   #updatedBy:VARCHAR#,

			sysdate

			,'0'

		)

		]]>

	</insert>

网上查了不少文章，试了好几种方法，都是因为长度导致失败。特到这儿发帖求助，望大家帮忙看看怎么解决。