executeQueryForObject returned too many results.

java.sql.SQLException: Error: executeQueryForObject returned too many results.
 at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryForObject(MappedStatement.java:124)
 at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:518)
 at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:493)
 at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106)
 at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:110)
 at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForObject(SqlMapClientImpl.java:86)
 at com.cgj.dao.EmployeeDaoImpl.select(EmployeeDaoImpl.java:13)
 at com.cgj.serice.ServiceImpl.selectEmployee(ServiceImpl.java:44)
 at com.cgj.main.Testit.main(Testit.java:24)
Exception in thread "main" java.lang.NullPointerException
 at com.cgj.main.Testit.main(Testit.java:25)



returned too many results说的是返回的值多于一个了，executeQueryForObject要求只返回一个值，看看你的这个查询是应该用executeQueryForList，还是本身的Sql有问题