Cannot cast from List<Object> to List<Professor>

Question

一个简单的Spring mvc mybatis框架的CRUD实例。但是下面DAOIMPL里面代码报错，改不了首先interface IProfessorDao写了
public List findAll();

然后IProfessorDaoImpl里面下面方法报错

public List findAll()

{

// TODO Auto-generated method stub

String sql = this.getStatementId(Professor.class, SELECTALL);

List list = (List)sqlSession.selectList(sql);
return list;

}
其中(List)sqlSession.selectList(sql); 这里提示 Cannot cast from List to List
SQLMAPPER设置也没有问题，代码如下


select * from ALL_EXP_LIST_TBL ;


求助怎么解决

Answer 1

可以改成List list = (List)sqlSession.selectList(sql);试试，List是转换不成List的