请问怎么在运行时取出在Ibatis映射参数后的SQL

    想取出的SQL是要映射参数后的SQL,而不是select * from user where name=?这样的SQL,而是要select * from user where name='sam'这样的SQL,看了它的源码有个这样的Sql对象有个getSqlString(RequestScope request,MappedStatement statement)方法,但是取出来还是一条如这样的SQL:select * from user where name=?,郁闷....有哪位知道的麻烦解答一下,感激不尽..