feat: 增加数据库连接预热

RollCallServer/src/main/java/cc/aspark/config/DatabaseConnectionWarmer.java

@@ -0,0 +1,35 @@
+package cc.aspark.config;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.ApplicationArguments;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.stereotype.Component;
+
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class DatabaseConnectionWarmer implements ApplicationRunner {
+
+    private final DataSource dataSource;
+
+    @Override
+    public void run(ApplicationArguments args) {
+        log.info("开始预热数据库连接池...");
+        long startTime = System.currentTimeMillis();
+
+        try (Connection conn = dataSource.getConnection()) {
+            try (Statement stmt = conn.createStatement()) {
+                stmt.execute("SELECT 1");
+            }
+            log.info("数据库连接预热完成，耗时：{}ms", System.currentTimeMillis() - startTime);
+        } catch (SQLException e) {
+            log.error("数据库连接预热失败", e);
+        }
+    }
+}