Add option to disable daylight savings time.

Author: neoremind

innodb-java-reader/src/main/java/com/alibaba/innodb/java/reader/config/ReaderSystemProperty.java

@@ -107,7 +107,8 @@ public final class ReaderSystemProperty<T> {
       stringProperty("innodb.java.reader.server.timezone", "");
 
   /**
-   * Whether to ignore daylight savings time when converting TIMESTAMP type.
+   * If server timezone is not set, this indicates whether to ignore
+   * daylight savings time when converting TIMESTAMP type.
    */
   public static final ReaderSystemProperty<Boolean> DISABLE_DAYLIGHT_SAVINGS_TIME =
       booleanProperty("innodb.java.reader.disable.daylight.savings.time",

innodb-java-reader/src/test/java/com/alibaba/innodb/java/reader/AbstractTest.java

@@ -28,6 +28,7 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Properties;
+import java.util.TimeZone;
 import java.util.function.Consumer;
 import java.util.function.Function;
 
@@ -342,7 +343,13 @@ private static Properties loadProperties() {
   }
 
   protected static String expectedLocalTime(String dateTime) {
-    ZoneRules rules = ZoneId.systemDefault().getRules();
+    String zoneId;
+    if (StringUtils.isNotEmpty(ReaderSystemProperty.SERVER_TIME_ZONE.value())) {
+      zoneId = TimeZone.getTimeZone(ReaderSystemProperty.SERVER_TIME_ZONE.value().trim()).getID();
+    } else {
+      zoneId = ZoneId.systemDefault().getId();
+    }
+    ZoneRules rules = ZoneId.of(zoneId).getRules();
     LocalDateTime ldt = Utils.parseDateTimeText(dateTime);
     Instant instant = ldt.toInstant(ZoneOffset.of("+00:00"));
     ZoneOffset zoneOffset;

innodb-java-reader/src/test/resources/innodb-java-reader.properties

@@ -2,4 +2,5 @@
 innodb.java.reader.enable.file.length.check=true
 innodb.java.reader.enable.throw.exception.for.unsupported.mysql80.lob=false
 innodb.java.reader.enable.page.checksum.check=true
-#innodb.java.reader.server.timezone=GMT-07:00
+#innodb.java.reader.server.timezone=GMT-07:00
+#innodb.java.reader.disable.daylight.savings.time=false