Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.5:generate (default-

[ERROR] Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.5:generate (default-cli) on project mmall: Communications link failure
[ERROR] 
[ERROR] Last packet sent to the server was 0 ms ago.
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Process finished with exit code 1

数据库连接失败，检查一下数据库是否能登录成功。