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<div><span style="color: #569cd6;">public</span>&nbsp;<span style="color: #569cd6;">interface</span>&nbsp;<span style="color: #4ec9b0;">MemberRepository</span>&nbsp;<span style="color: #569cd6;">extends</span>&nbsp;<span style="color: #4ec9b0;">CrudRepository</span>&lt;<span style="color: #4ec9b0;">Member</span>,&nbsp;<span style="color: #4ec9b0;">Long</span>&gt;&nbsp;{</div>
<div>}</div>
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<div><span style="color: #569cd6;">private</span>&nbsp;<span style="color: #569cd6;">final</span>&nbsp;<span style="color: #4ec9b0;">MemberRepository</span>&nbsp;<span style="color: #9cdcfe;">memberRepository</span>;</div>
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<div><span style="color: #4ec9b0;">Member</span>&nbsp;<span style="color: #9cdcfe;">member</span>&nbsp;=&nbsp;<span style="color: #9cdcfe;">memberRepository</span>.<span style="color: #dcdcaa;">findById</span>(memberId).<span style="color: #dcdcaa;">get</span>();</div>
<div></div>
<div><span style="color: #4ec9b0;">Delivery</span>&nbsp;<span style="color: #9cdcfe;">delivery</span>&nbsp;=&nbsp;<span style="color: #c586c0;">new</span>&nbsp;<span style="color: #dcdcaa;">Delivery</span>();</div>
<div><span style="color: #9cdcfe;">delivery</span>.<span style="color: #dcdcaa;">setAddress</span>(<span style="color: #9cdcfe;">member</span>.<span style="color: #dcdcaa;">getAddress</span>());</div>
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<p>죄송합니다. 이거 취소누른다고 눌렀는데 등록을 누른거 같습니다&nbsp;</p>

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스프링 데이터 JPA 옵셔널 처리