@ManyToOne(fetch = FetchType.LAZY, optional = true)
@JoinColumns(value={
@JoinColumn(name ="ROADID", referencedColumnName ="ID",insertable=false, updatable=false),
@JoinColumn(name="CITYID", referencedColumnName = "CITYID",insertable=false, updatable=false)
})
外键关联复合主键
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转载自www.cnblogs.com/czhaosheng/p/9958193.html
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