change

tests/examples/JDBC/JDBCDemo/readme.md

@@ -21,21 +21,18 @@ mvn clean compile exec:java -Dexec.mainClass="com.taosdata.example.JdbcDemo" -De
 ```
 
 ## Compile the Demo Code and Run It
-To compile the demo project, go to the source directory ``TDengine/tests/examples/JDBC/JDBCDemo`` and execute
+To compile taos-jdbcdriver, go to the source directory ``TDengine/src/connector/jdbc`` and execute
 ```
-cd TDengine/src/connector/jdbc
-
 mvn clean package -Dmaven.test.skip=true
+```
 
-cp target/taos-jdbcdriver-2.0.x-dist.jar ../../../tests/examples/JDBC/JDBCDemo/target/
-
-cd ../../../tests/examples/JDBC/JDBCDemo
-
+To compile the demo project, go to the source directory ``TDengine/tests/examples/JDBC/JDBCDemo`` and execute
+```
 mvn clean package assembly:single
 ```
 
-To run it, go to ``TDengine/tests/examples/JDBC/JDBCDemo/target`` and execute
+To run JDBCDemo.jar, go to ``TDengine/tests/examples/JDBC/JDBCDemo`` and execute
 ```
-java -Djava.ext.dirs=.:$JAVA_HOME/jre/lib/ext -jar JDBCDemo-SNAPSHOT-jar-with-dependencies.jar -host localhost
+java -Djava.ext.dirs=../../../../src/connector/jdbc/target:$JAVA_HOME/jre/lib/ext -jar target/JDBCDemo-SNAPSHOT-jar-with-dependencies.jar -host [HOSTNAME]
 ```