Non-static method 'save(java.long.Object)' cannot be referenced from a static context.
犯了一個很低階的錯誤，
Non-static method ‘save(java.long.Object)’ cannot be referenced from a static context.
非靜態方法“儲存（java.長物件）”不能從靜態上下文引用。
如圖：
解決方法：
檢查mongoTemplate是否注入：
請注入正確：
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