1.com.ibatis.common.jdbc.exception.NestedSQLException:     
2.--- The error occurred in sqlmaps/sql-t.xml.    
3.--- The error occurred while applying a result map.    
4.--- Check the Task.result-task-obj.    
5.--- The error happened while setting a property on the result object.    
6.--- Cause: net.sf.cglib.beans.BulkBeanException  
7.        at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryWithCallback(MappedStatement.java:204)  
8.        at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryForList(MappedStatement.java:139)  
9.        at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:567)  
10.        at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:541)  
11.        at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:118)  
12.        at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForList(SqlMapClientImpl.java:94) 
com.ibatis.common.jdbc.exception.NestedSQLException:  
--- The error occurred in sqlmaps/sql-t.xml. 
--- The error occurred while applying a result map. 
--- Check the Task.result-task-obj. 
--- The error happened while setting a property on the result object. 
--- Cause: net.sf.cglib.beans.BulkBeanException
        at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryWithCallback(MappedStatement.java:204)
        at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryForList(MappedStatement.java:139)
        at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:567)
        at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:541)
        at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:118)
        at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForList(SqlMapClientImpl.java:94)
最后通过baidu一下知道了异常Cause: net.sf.cglib.beans.BulkBeanException引起的原因是数据库表中有一个可以为空的列（列的类型是number），当查询的时候由于该列没有值ibtis会用null去初始化该列，但把null类型赋值给number类型的值时，出现如上异常信息。解决方法是找到ibatis配置文件sql-t.xml中的

Java代码 
1.<resultMap id="result-task-obj" class="Task_Obj">  
2.<result property="duplicated" column="DUPLICATED"/>  
3.</resultMap> 
<resultMap id="result-task-obj" class="Task_Obj">
<result property="duplicated" column="DUPLICATED"/>
</resultMap>

Java代码 
1.把  
2.<result property="duplicated" column="DUPLICATED"/>  
3.修改成  
4.<result property="duplicated" column="DUPLICATED" nullValue="0"/> 
把
<result property="duplicated" column="DUPLICATED"/>
修改成
<result property="duplicated" column="DUPLICATED" nullValue="0"/>即当DUPLICATED列对应的值为null时，会用0值初始化duplicated属性(duplicated对应其类中的数据类型是int)。修改后系统运行正常。