完善同步

src/main/java/com/dashboard/aws/lambda/handler/S3ToMySQLHandler.java

@@ -32,6 +32,9 @@ public class S3ToMySQLHandler implements RequestHandler<Map<String, Object>, Str
             LocalDate now = DateUtil.resolveEventDate( event, zone);
             String dateStr = DateUtil.getLastYearSameIsoWeekDayStr(now);
 
+            // --- 解析出 fileDate（用于删除早于该日期的数据） ---
+            LocalDate fileDate = LocalDate.parse(dateStr);
+
             // 查询符合条件的企业ID
             List<Long> companyIds = mysqlService.getActiveCompanyIds();
             logger.info("company id list: {}", companyIds);
@@ -42,6 +45,10 @@ public class S3ToMySQLHandler implements RequestHandler<Map<String, Object>, Str
                 String schema = "data_center_dongjian_" + companyId;
 
                 for (String table : tables) {
+                    //先删除旧数据
+                    int deleted = mysqlService.deleteBeforeDate(schema, table, fileDate);
+                    logger.info("[{}][{}] deleted {} records before {}", schema, table, deleted, fileDate);
+
                     // 构造 S3 文件路径
                     String s3Key = String.format("%s/%s/%s.csv", table, companyId, dateStr);
                     logger.info("processing s3 file: {}", s3Key);

src/main/java/com/dashboard/aws/lambda/service/MySQLService.java

@@ -4,6 +4,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.sql.*;
+import java.time.LocalDate;
 import java.util.*;
 
 public class MySQLService {
@@ -101,4 +102,27 @@ public class MySQLService {
         }
         return total;
     }
+
+    public int deleteBeforeDate(String schema, String table, LocalDate fileDate) {
+        // 计算比较值： yyyyMMdd 格式的整数（例如 20251008）
+        int cutoff = fileDate.getYear() * 10000 + fileDate.getMonthValue() * 100 + fileDate.getDayOfMonth();
+
+        String sql = String.format(
+                "DELETE FROM %s.%s WHERE (COALESCE(date_year,0) * 10000 + COALESCE(date_month,0) * 100 + COALESCE(date_day,0)) < ?",
+                schema, table
+        );
+        logger.info("deleteBeforeDate sql: {}, cutoff:{}", sql, cutoff);
+
+        try (Connection conn = java.sql.DriverManager.getConnection(MYSQL_URL, DB_USER, DB_PASSWORD);
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+            ps.setInt(1, cutoff);
+            int deleted = ps.executeUpdate();
+            logger.info("deleteBeforeDate: schema={}, table={}, cutoff={}, deleted={}", schema, table, cutoff, deleted);
+            return deleted;
+        } catch (SQLException e) {
+            logger.error("deleteBeforeDate failed for {}/{} cutoff={}", schema, table, cutoff, e);
+            return 0;
+        }
+    }
+
 }