Error updating database. Cause: java.sql.SQLException: Field ‘id’ doesn’t have a default value
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Cause: java.sql.SQLException: Field ‘id’ doesn’t have a default value; Field ‘id’ doesn’t have a default value; nested exception is java.sql.SQLException: Field ‘id’ doesn’t have a default value
此时id字段设置为非null 将报错信息结合id非null于是（此处应该结合具体SQL语句（此处一概而过）——就是没有向id中插入任何数据。） 从此可分析出解决办法 1：插入数据 2：将id设置允许null
