What is the command to run the testng.xml or How to save bat file to excute textng.xml

step1. open notepad.
step2. paste this command
           java -cp bin;jars/* org.testng.TestNG testng.xml

step3. save this as filename.bat and put it inside the project directory.
step4. Now to execute the script through testng.xml , open the project and click on this bat file.
This will open the cmd and will run the entire suite.