如何在spring启动应用程序中的.log文件中编写stdout语句

Question

• I am trying to write System.out.print statement in log file

• I use the following application.properties file

logging.level.org.springframework.web=INFO

logging.level.org.hibernate=ERROR

logging.level.com.cirq.configurator=INFO

logging.path=${mypath}

logging.file=filename.log

• But using the above code, I am not able to write System.out.print statement in the log file
• First, I create .jar file of my spring-boot project and run in undertow application server
• Please help me.... Thanks in advance

Answer 1

if you are deploying .jar file in undertow application server, then System.out.print statement will not work(means it will not write in log file).

For that you have to use log4j which is in-built in Spring Boot.

Example:

final static Logger logger = LoggerFactory.getLogger(YourController.class);

logger.info("Your print statement");

Refer link

Answer 2

You need to add this dependency in your pom.xml file:

<dependency>
   <groupId>uk.org.lidalia</groupId>
   <artifactId>sysout-over-slf4j</artifactId>
   <version>1.0.2</version>
</dependency>

Then in the main method before you do anything call this code:

SysOutOverSLF4J.sendSystemOutAndErrToSLF4J();

That way anything that is written in sysout or syserr gets caught in the logging system