How to integrate SCALA LOGGING SLF4J framework in the Java class library

How to integrate SCALA LOGGING SLF4J framework in the Java class library Overview: In Java development, log records are very important because it can help us track and debug the code.Scala Logging is a lightweight, easy -to -use log record framework based on SLF4J, which provides powerful functions and flexible configuration options.This article will introduce how to integrate the Scala Logging SLF4J framework in the Java library. step: 1. Add dependencies First, open your Java class library project and make sure you are using the construction tool, such as Maven or Gradle.Then, add the following dependencies in the project construction file (Pom.xml or Build.gradle): Maven: <dependencies> <dependency> <groupId>com.typesafe.scala-logging</groupId> <artifactId>scala-logging_2.13</artifactId> <version>3.9.4</version> </dependency> </dependencies> Gradle: groovy dependencies { implementation 'com.typesafe.scala-logging:scala-logging_2.13:3.9.4' } Save the construction file and reload the dependencies. 2. Create a log recorder In your Java class, introduce the Logger class of Scala Logging and create a new logger instance: import com.typesafe.scalalogging.Logger; import org.slf4j.LoggerFactory; public class MyClass { private final Logger logger = Logger.apply(LoggerFactory.getLogger(MyClass.class)); // ... } Here, we use SLF4J's loggerFactory to create a logger instance and pass it to the logger.apply () method of Logger.apply () of the scala logging to create a Logger instance of Scala Logging. 3. Use a log recorder Now you can use logger in your class to record logs.For example, you can use the `Logger.info ()` to record an informatious log message: public class MyClass { private final Logger logger = Logger.apply(LoggerFactory.getLogger(MyClass.class)); public void doSomething() { // ... logger.info("Doing something..."); // ... } // ... } You can record different types of log messages using different log levels (such as: Debug, ERROR, Warn, etc.). 4. Configure log recorder By default, SCALA Logging will use Simple Logging Facade for Java (SLF4J) configuration.If you have a special log record requirements, you can configure SLF4J as needed. For example, in the Maven project, you can create a XML file called `logback.xml` in the resource directory of the project and configure it according to your requirements.Then, when you start the application, SLF4J will load the configuration file. Example logback.xml file content: <configuration> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <root level="INFO"> <appender-ref ref="CONSOLE"/> </root> </configuration> In this example, we configure a console log recorder named `console` and define the format of the log message.Then, we set the root log level to INFO and add the `console` additioner to the root log recorder. Please configure according to your own needs. Summarize: Through this article, we have learned how to integrate the Scala Logging SLF4J framework in the Java library.First, we added the dependency item of Scala Logging.Then, we created a log recorder and used it to record different types of log messages.Finally, we introduced how to configure SLF4J as needed.Now, you can use Scala Logging in your Java library for log records.