The User Guide for JCABI LOG Framework in Java Class Libraries in the Java Class Library

Guide to use the JCABI LOG framework in the Java class library JCABI LOG is a powerful and flexible log record framework that can be used in the Java class library.This guide will introduce how to use the JCABI LOG framework in the Java library and provide relevant programming code and configuration examples. 1. Introduce the JCABI LOG framework To use the JCABI LOG framework, you first need to add corresponding dependencies to the project construction file (such as Maven's pom.xml).Add the following dependencies in the element: <dependency> <groupId>com.jcabi</groupId> <artifactId>jcabi-log</artifactId> <version>0.18</version> </dependency> Then compile the project so that the JCABI LOG framework is added to the project path of the project. 2. Create a log recorder In the Java library, a log recorder can be created by using the `SLF4Jlogger` class.Create a new Java class, and then use the following code to create a log recorder: import com.jcabi.log.Slf4jLogger; public class MyClass { private static final Logger log = new Slf4jLogger(); // ... } In the above code, we use the SLF4JLOGER class to create a static log recorder called `LOG`. 3. Use a log recorder Once a log recorder is created, you can use it to record log information.The JCABI LOG framework provides multiple log levels, including `Trace`,` Debug`, `Info`,` Warn` and `Error`.Here are some examples of examples, showing how to use different log levels: public class MyClass { private static final Logger log = new Slf4jLogger(); public void doSomething() { log.debug("This is a debug message"); log.info("This is an info message"); log.warn("This is a warning message"); log.error("This is an error message"); } } In the above code, we use the log recorder to record different levels of log information. 4. Configure log framework In order to make the JCABI LOG framework work normally, the log framework of the bottom layer is required.In this example, we will use the SLF4J log frame.Configure the SLF4J log framework in the configuration file of the project (such as logback.xml) to output the log to the required positions (such as the console, file, etc.).The following is a simple LOGBACK configuration example: <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> <logger name="com.jcabi.log.Slf4jLogger" level="INFO" /> <root level="INFO"> <appender-ref ref="CONSOLE" /> </root> </configuration> In the above configuration example, we are equipped with a console output called `Console`.Then, we set the log level as INFO for `com.jcabi.log.slf4jlogger`.Finally, we set the level of the root log recorder to INFO and attach it to the console output. Through the above steps, the use configuration of the JCABI LOG framework in the Java class library is completed. Summarize This guide introduces the steps to use the JCABI LOG framework in the Java library.By introducing dependencies, creating log recorders, using different logs and configuration log frameworks, log information can be easily recorded.The JCABI LOG framework provides developers with a powerful log record function, which can be used for debugging and wrong tracking in the development of Java library.