Unsatisfied dependency expressed through field 'categoryService'

回答: 出现"Unsatisfied dependency expressed through field 'categoryService'"的报错是由于在字段'categoryService'上存在依赖关系问题。通常情况下，这种报错出现的原因有以下几种可能性：<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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