Using org.hibernate.id.UUIDHexGenerator which does not generate IETF RFC 4122 compliant UUID values;

项目部署，启动过程中有以下警告：

[WARN]: Using org.hibernate.id.UUIDHexGenerator which does not generate IETF RFC 4122 compliant UUID values; consider using org.hibernate.id.UUIDGenerator instead

查看项目中用户类的主键生成策略：

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@GenericGenerator(name = "system-uuid", strategy = "uuid.hex")

@Id

@GeneratedValue(generator = "system-uuid")

@Column(name = "user_id")

public String getUserId() {

return userId ;

}

经查询，Hibernate 3.6开始，如果有model的主键有uuid生成，就会报这个错误，采用最新的生成策略，改成下面的就会正常

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@Id

@Column(length = 32, nullable = false)

@GeneratedValue(generator = "uuid2" ) //指定生成器名称

@GenericGenerator(name = "uuid2", strategy = "org.hibernate.id.UUIDGenerator" ) //生成器名称，uuid生成类

XML配置：

原来的：

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<id name="id" type="string">

<column name="ID" length="32" />

<generator class="uuid" />

</id>

现在改变后的：

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<id name="id" type="string">

<column name="ID" length="36" />

<generator class="uuid2" />

</id>