fix timestamp bug

hutool-db/src/main/java/cn/hutool/db/handler/HandleHelper.java

@@ -265,15 +265,14 @@ public class HandleHelper {
 	 * @throws SQLException SQL异常
 	 */
 	private static <T> Object getColumnValue(ResultSet rs, int columnIndex, int type, Type targetColumnType) throws SQLException {
-		Object rawValue;
+		Object rawValue = null;
 		switch (type) {
 		case Types.TIMESTAMP:
 			try{
 				rawValue = rs.getTimestamp(columnIndex);
 			} catch (SQLException ignore){
 				// issue#776@Github
-				// 当数据库中日期为0000-00-00 00:00:00报错，按照普通日期获取
-				rawValue = rs.getDate(columnIndex);
+				// 当数据库中日期为0000-00-00 00:00:00报错，转为null
 			}
 			break;
 		case Types.TIME:

hutool-db/src/test/java/cn/hutool/db/MySQLTest.java

@@ -5,6 +5,7 @@ import org.junit.Ignore;
 import org.junit.Test;
 
 import java.sql.SQLException;
+import java.util.List;
 
 /**
  * MySQL操作单元测试
@@ -26,11 +27,11 @@ public class MySQLTest {
 			);
 		}
 	}
-	
+
 	/**
 	 * 事务测试<br>
 	 * 更新三条信息，低2条后抛出异常，正常情况下三条都应该不变
-	 * 
+	 *
 	 * @throws SQLException SQL异常
 	 */
 	@Test(expected=SQLException.class)
@@ -56,4 +57,11 @@ public class MySQLTest {
 		}
 	}
 
+	@Test
+	@Ignore
+	public void getTimeStampTest() throws SQLException {
+		final List<Entity> all = Db.use("mysql").findAll("test");
+		Console.log(all);
+	}
+
 }

hutool-db/src/test/resources/config/db.setting

@@ -37,7 +37,7 @@ user = looly
 pass = 123456
 
 [mysql]
-url = jdbc:mysql://looly.centos:3306/test_hutool?useSSL=false
+url = jdbc:mysql://looly.centos8:3306/hutool_test?useSSL=false
 user = root
 pass = 123456