Update 设计模式 - 单例.md

补充双重校验锁指令重排序配图与说明,调整枚举及内部类单例机制描述;补充使用场景示例及与 Spring 单例 Bean 的对比,更新相关链接。
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2026-10-30 20:19:42 +08:00
parent da1df55d59
commit c7503b49fb
2 changed files with 26 additions and 19 deletions
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