How to Use Scala Logging in Java Class Libraries to Record Exception Messages

How to Use Scala Logging in Java Class Libraries to Record Exception Messages Scala Logging is a commonly used logging library that provides developers with a concise and easy-to-use method to record exception information. By using Scala Logging in the Java class library, it is easy to record exceptions that occur during program execution, making it easier to debug and troubleshoot problems. The following are the steps for using Scala Logging to record exception information in the Java class library: Step 1: Add Scala Logging dependency Add a dependency on Scala Logging in the project's build file to enable the introduction of this class library into the project. The following dependencies can be added to the pom.xml file of the project: <dependency> <groupId>com.typesafe.scala-logging</groupId> <artifactId>scala-logging_2.13</artifactId> <version>3.9.4</version> </dependency> Step 2: Create a Logger object In the Java class library, you first need to create a Logger object to record exception information. You can create a Logger object using the following code: import org.slf4j.Logger; import org.slf4j.LoggerFactory; Logger logger = LoggerFactory.getLogger(YourClassName.class); Replace 'YourClassName' with the name of the current class. Step 3: Record abnormal information When an exception is caught, the corresponding method of the Logger object can be used to record the exception information. The following are some commonly used logging methods: try { //Executing code that may throw exceptions } catch (Exception e) { Logger. error ("Exception occurred:", e); } In the above code, exception information was recorded by calling the logger. error method. Abnormal information will be output to both the console and log files. Step 4: Configure the logger In order for the logger to take effect, corresponding configuration is required. You can configure the format and output location of logs in the project's configuration file (such as logback. xml). <configuration> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <appender name="FILE" class="ch.qos.logback.core.FileAppender"> <file>logs/myapp.log</file> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <logger name="YourClassName" level="DEBUG"> <appender-ref ref="CONSOLE"/> <appender-ref ref="FILE"/> </logger> <root level="INFO"> <appender-ref ref="CONSOLE"/> <appender-ref ref="FILE"/> </root> </configuration> The above configuration file defines two Appenders: CONSOLE for outputting logs to the console, and FILE for outputting logs to a file. The logger tag is used to specify the name and level of the logger, as well as bind the corresponding Appender. Through the above steps, Scala Logging can be used to record exception information in the Java class library. In this way, when the program encounters an exception, abnormal information can be recorded in a timely manner, and debugging and fixing problems can be carried out accordingly.