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Spring Boot 3 + XXL-Job + Redis Contract Expiry Alerts: Window Scanning, SETNX Idempotency, and Overdue Payment Tagging

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SpringBoot3+XXL-Job+Redis 合同到期提醒：窗口扫描、SETNX 幂等与收付款逾期打标

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Ranking history & source details

First recorded Aug 27, 2026, 11:18 PM CST · latest Aug 30, 2026, 8:23 AM CST. Ranks reflect attention on each platform.

Retained daily observations
DayPlatformBest rankLast rank
2026-08-30CSDN#24#24
2026-08-27CSDN#21#21
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