For the hibernate framework, the id is the self-increasing primary key

The results generated by default:

 <id name="id" type="java.lang.Integer">
            <column name="id" />
            <generator class="assigned" />
        </id>

 

1. Automatic growth identity (to confirm that self-growth has been set during database design)

After modification:

 <id name="id" type="java.lang.Integer">
            <column name="id" />
            <generator class="identity" />
        </id>

 

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Origin www.cnblogs.com/1gaoyu/p/12713897.html