增加 Java 笔记。

Suomea · Dec 23, 2024 · afb0407 · afb0407
1 parent 99795f6
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Showing 4 changed files with 70 additions and 16 deletions.
diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
@@ -27,16 +27,44 @@
             "state": {
               "type": "markdown",
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-                "file": "docs/MySQL/MySQL 配置主从.md",
+                "file": "docs/Redis/Redis 数据结构.md",
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                 "source": false
               },
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-              "title": "MySQL 配置主从"
+              "title": "Redis 数据结构"
+            }
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+                "mode": "source",
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+              },
+              "icon": "lucide-file",
+              "title": "未命名"
+            }
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+                "file": "docs/Java/日期时间操作.md",
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+              },
+              "icon": "lucide-file",
+              "title": "日期时间操作"
             }
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@@ -88,7 +116,8 @@
               "title": "书签"
             }
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@@ -179,11 +208,21 @@
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-  "active": "6946aa7c05144594",
+  "active": "c3e1cd9fa3752c91",
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+    "docs/Java/日期时间操作.md",
+    "docs/Linux/未命名.md",
+    "docs/Redis/Redis 数据结构.md",
+    "docs/Redis/Redis 安装.md",
+    "docs/Redis/Redis 分布式锁.md",
     "docs/MySQL/MySQL 备份.md",
-    "docs/MySQL/MySQL 配置主从.md",
     "docs/MySQL/MySQL 安装.md",
+    "docs/Kafka/Kafka 快速开始.md",
+    "docs/Kafka/Kafka 常用命令.md",
+    "docs/Kafka/Kafka 集群搭建.md",
+    "docs/Kafka/Kafka Tips.md",
+    "docs/MySQL/MySQL 配置主从.md",
     "docs/Linux/运维监控.md",
     "docs/MySQL/MySQL 系统和状态变量.md",
     "docs/Linux/ls.md",
@@ -198,16 +237,6 @@
     "docs/Linux/Git.md",
     "docs/Linux/curl.md",
     "docs/Linux/ArcLinux 安装.md",
-    "docs/Linux/正则表达式.md",
-    "docs/Linux/时间.md",
-    "docs/Linux/查找文件.md",
-    "docs/Kafka/Kafka 配置.md",
-    "docs/Kafka/Kafka 快速开始.md",
-    "docs/Kafka/Kafka Tips.md",
-    "docs/Kafka/Kafka 集群搭建.md",
-    "docs/Kafka/Kafka 常用命令.md",
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diff --git a/docs/Java/日期时间操作.md b/docs/Java/日期时间操作.md
@@ -0,0 +1,18 @@
+Spring boot 通过 @RequestParam 接收 LocalDateTime
+```java
+@GetMapping("test")
+public R<?> test(
+        @RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime startTime,
+        @RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime endTime) {
+        ···
+}
+```
+
+获取两个 LocalDateTime 之间的间隔
+```java
+Duration duration = Duration.between(startTime, endTime);
+duration.toDays();
+duration.toHours();
+duration.toMinutes();
+duration.getSeconds();
+```
diff --git a/docs/Linux/未命名.md b/docs/Linux/未命名.md
diff --git a/docs/MySQL/MySQL 配置主从.md b/docs/MySQL/MySQL 配置主从.md
@@ -119,6 +119,13 @@ character-set-server    = utf8mb4
 max_connections         = 2000
 ```
 
+配置从库只同步主库的部分数据库：
+```
+[mysqld]
+replicate-do-db=database1
+replicate-do-db=database2
+```
+
 配置主库信息：
 ```sql
 CHANGE REPLICATION SOURCE TO