ibatis 保持序列化对象

数据库表
CREATE TABLE `info_thread` (
  `id` bigint(20) NOT NULL auto_increment,
  `infoId` bigint(20) NOT NULL,
.......
  `stackInfo` BLOB default null,
 
  PRIMARY KEY  (`id`),
  KEY `infoId` (`infoId`),
  KEY `serverId` (`serverId`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;


1.JvmInfo.java里面   引用下面类对象.
private List<ThreadInfo> statckInfos;
.......

2.ThreadInfo.java里面   要序列化这个数组
private StackTraceElement[] stackInfo;
.......

3.JvmInfo.xml  这里在获得JvmIinfo对象时,生成List<ThreadInfo>
<resultMap id="JvmInfoResult" class="JvmInfo">
<result property="id" column="id"/>
<result property="statckInfos" column="id" select="getThreadInfosByInfoId"/>
</resultMap>
 
<resultMap id="ThreadInfoResult" class="ThreadInfo">
<result property="id" column="id"/>
<result property="infoId" column="infoId"/>

这里要设置 javaType="[Ljava.lang.StackTraceElement;" jdbcType="BLOB" 可是不知道为什么我测试的时候返回的是byte[].?????????
   <result property="stackInfo" column="stackInfo" javaType="[Ljava.lang.StackTraceElement;" jdbcType="BLOB"/>
</resultMap>

<statement id="getThreadInfosByInfoId" parameterClass="java.lang.Long" resultMap="ThreadInfoResult">
select * from info_thread where infoId = #value#
</statement>

<insert id="insertThreadInfo" parameterClass="ThreadInfo"> 
<![CDATA[INSERT INTO info_thread(
serverId,infoId,threadId,threadName,allCupTime,userCupTime,isAlive,stackInfo)
VALUES(#serverId#,#infoId#,#threadId#,#threadName#,#allCupTime#,#userCupTime#,#isAlive#,#stackInfo,jdbcType=BLOB,javaType=[Ljava.lang.StackTraceElement;#)]]>   
<selectKey resultClass="java.lang.Long" keyProperty="id"> 
<![CDATA[SELECT LAST_INSERT_ID() AS ID ]]> 插入时把id赋值
</selectKey> 
</insert>

4.SqlMapConfig.xml配置里

<typeHandler javaType="[Ljava.lang.StackTraceElement;" callback="com.ibatis.sqlmap.engine.type.ObjectTypeHandler" jdbcType="BLOB"/> 


不知道为什么获得的byte[].我做了反序列化
ObjectInputStream ois = null;
try {
ois = new ObjectInputStream(new ByteArrayInputStream(s));
StackTraceElement[] stackInfo = (StackTraceElement[]) ois.readObject();
this.stackInfo = stackInfo;

} catch (Exception e) {
this.stackInfo = new StackTraceElement[0];
} finally {
if (ois != null) {
try {
ois.close();
} catch (IOException e) {
}
}
}