重写Address类的toString()怎么输出address=null呢?
输出结果如下:Student [stuId=1, stuName=李四, gender=男, birthday=2016-11-09 08:42:38.0, address=Address [postcode=351000, phone=059187654321, address=null], image=null]
输出结果如下:Student [stuId=1, stuName=李四, gender=男, birthday=2016-11-09 08:42:38.0, address=Address [postcode=351000, phone=059187654321, address=null], image=null]
2016-11-09
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