MyBatis批量插入(insert)数据操作

public class TrainRecord implements Serializable { 
private static final long serialVersionUID = -1206960462117924923L; 
private long id; 
private long activityId; 
private long empId; 
private int flag; 
private String addTime; 
//setter and getter 
} 

<resultMap type="TrainRecord" id="trainRecordResultMap"> 
<id column="id" property="id" jdbcType="BIGINT" /> 
<result column="add_time" property="addTime" jdbcType="VARCHAR" /> 
<result column="emp_id" property="empId" jdbcType="BIGINT" /> 
<result column="activity_id" property="activityId" jdbcType="BIGINT" /> 
<result column="flag" property="status" jdbcType="VARCHAR" /> 
</resultMap> 

<insert id="addTrainRecordBatch" useGeneratedKeys="true" parameterType="java.util.List"> 
<selectKey resultType="long" keyProperty="id" order="AFTER"> 
SELECT 
LAST_INSERT_ID() 
</selectKey> 
insert into t_train_record (add_time,emp_id,activity_id,flag) 
values 
<foreach collection="list" item="item" index="index" separator="," > 
(#{item.addTime},#{item.empId},#{item.activityId},#{item.flag}) 
</foreach> 
</insert> 

public class MySqlBaseDAO extends SqlSessionDaoSupport { 
/** 
* insert:插入操作. <br/> 
* 
* @author chenzhou 
* @param method 插入操作的方法名 
* @param entity 查询参数或实体类 
* @return 返回影响的行数 
* @since JDK 1.6 
*/ 
public int insert(String method,Object entity){ 
return this.getSqlSession().insert(method, entity); 
} 
//其余方法省略 
} 

public class TrainRecordDAO extends MySqlBaseDAO { 
/** 
* addTrainRecordBatch:批量插入培训记录. <br/> 
* 
* @author chenzhou 
* @param trainRecordList 培训记录list集合 
* @return 影响的行数 
* @since JDK 1.6 
*/ 
public int addTrainRecordBatch(List<TrainRecord> trainRecordList){ 
return this.insert("addTrainRecordBatch", trainRecordList); 
} 
//省略其余的方法 
} 

<![CDATA[ 
select * from t_train_record t where t.activity_id=#{activityId} 
]]> 

<![CDATA[ 
insert into t_train_record (add_time,emp_id,activity_id,flag) 
values 
<foreach collection="list" item="item" index="index" separator="," > 
(#{item.addTime},#{item.empId},#{item.activityId},#{item.flag}) 
</foreach> 
]]>