add timezone spec details

docs/en/14-reference/03-connector/04-java.mdx

@@ -149,7 +149,7 @@ TDengine currently supports timestamp, number, character, Boolean type, and the
 Due to historical reasons, the BINARY type data in TDengine is not truly binary data and is no longer recommended for use. Please use VARBINARY type instead.  
 GEOMETRY type is binary data in little endian byte order, which complies with the WKB specification. For detailed information, please refer to [Data Type] (/tao-sql/data-type/#Data Types)  
 For WKB specifications, please refer to [Well Known Binary (WKB)]（ https://libgeos.org/specifications/wkb/ ）  
-For Java connectors, the jts library can be used to easily create GEOMETRY type objects, serialize them, and write them to TDengine. Here is an example [Geometry example]（https://github.com/taosdata/TDengine/blob/3.0/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/GeometryDemo.java）  
+For Java connector, the jts library can be used to easily create GEOMETRY type objects, serialize them, and write them to TDengine. Here is an example [Geometry example]（https://github.com/taosdata/TDengine/blob/3.0/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/GeometryDemo.java）  
 
 
 ## Installation Steps
@@ -361,7 +361,7 @@ The configuration parameters in properties are as follows.
 - TSDBDriver.PROPERTY_KEY_CONFIG_DIR: only works when using JDBC native connection. Client configuration file directory path, default value `/etc/taos` on Linux OS, default value `C:/TDengine/cfg` on Windows OS, default value `/etc/taos` on macOS.
 - TSDBDriver.PROPERTY_KEY_CHARSET: In the character set used by the client, the default value is the system character set.
 - TSDBDriver.PROPERTY_KEY_LOCALE: this only takes effect when using JDBC native connection. Client language environment, the default value is system current locale.
-- TSDBDriver.PROPERTY_KEY_TIME_ZONE: only takes effect when using JDBC native connection. In the time zone used by the client, the default value is the system's current time zone.
+- TSDBDriver.PROPERTY_KEY_TIME_ZONE: only takes effect when using JDBC native connection. In the time zone used by the client, the default value is the system's current time zone. Due to historical reasons, we only support some specifications of the POSIX standard, such as UTC-8 (representing timezone Shanghai in China), GMT-7, Europe/Paris.
 - TSDBDriver.HTTP_CONNECT_TIMEOUT: REST connection timeout in milliseconds, the default value is 60000 ms. It only takes effect when using JDBC REST connection.
 - TSDBDriver.HTTP_SOCKET_TIMEOUT: socket timeout in milliseconds, the default value is 60000 ms. It only takes effect when using JDBC REST connection and batchfetch is false.
 - TSDBDriver.PROPERTY_KEY_MESSAGE_WAIT_TIMEOUT: message transmission timeout in milliseconds, the default value is 60000 ms. It only takes effect when using JDBC REST connection and batchfetch is true.

docs/zh/08-connector/14-java.mdx

@@ -363,7 +363,7 @@ properties 中的配置参数如下：
 - TSDBDriver.PROPERTY_KEY_CONFIG_DIR：仅在使用 JDBC 原生连接时生效。客户端配置文件目录路径，Linux OS 上默认值 `/etc/taos`，Windows OS 上默认值 `C:/TDengine/cfg`。
 - TSDBDriver.PROPERTY_KEY_CHARSET：客户端使用的字符集，默认值为系统字符集。
 - TSDBDriver.PROPERTY_KEY_LOCALE：仅在使用 JDBC 原生连接时生效。 客户端语言环境，默认值系统当前 locale。
-- TSDBDriver.PROPERTY_KEY_TIME_ZONE：仅在使用 JDBC 原生连接时生效。 客户端使用的时区，默认值为系统当前时区。
+- TSDBDriver.PROPERTY_KEY_TIME_ZONE：仅在使用 JDBC 原生连接时生效。 客户端使用的时区，默认值为系统当前时区。因为历史的原因，我们只支持POSIX标准的部分规范，如UTC-8(代表中国上上海), GMT-8，Asia/Shanghai 这几种形式。
 - TSDBDriver.HTTP_CONNECT_TIMEOUT: 连接超时时间，单位 ms， 默认值为 60000。仅在 REST 连接时生效。
 - TSDBDriver.HTTP_SOCKET_TIMEOUT: socket 超时时间，单位 ms，默认值为 60000。仅在 REST 连接且 batchfetch 设置为 false 时生效。
 - TSDBDriver.PROPERTY_KEY_MESSAGE_WAIT_TIMEOUT: 消息超时时间, 单位 ms， 默认值为 60000。 仅在 REST 连接且 batchfetch 设置为 true 时生效。