change

tests/examples/JDBC/readme.md

+# TDengine examples
+
+| No.  |        Name        | Describe                                                     |
+| :--: | :----------------: | ------------------------------------------------------------ |
+|  1   |      JDBCDemo      | Example codes for JDBC-JNI, JDBC-RESTful, Subscribe          |
+|  2   |  connectionPools   | Example codes for HikariCP, Druid, dbcp, c3p0 connection pools |
+|  3   | SpringJdbcTemplate | Example codes for spring jdbcTemplate                        |
+|  4   |  mybatisplus-demo  | Example codes for mybatis                                    |
+|  5   |   springbootdemo   | Example codes for springboot                                 |
+|  6   |      taosdemo      | This is an internal tool for testing Our JDBC-JNI, JDBC-RESTful, RESTful interfaces |
+
+
+more detail: https://www.taosdata.com/cn//documentation20/connector-java/
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