pom.xml
<!-- slf4j Logger -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.13</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.3</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.1.3</version>
</dependency>
logback.xml file
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<!-- Send debug messages to System.out -->
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<!-- By default, encoders are assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder -->
<encoder>
<Pattern>
[%-5level] %logger:%line - %message%n
</Pattern>
</encoder>
</appender>
<!-- Send debug messages to a file at "/logs/test.log" -->
<appender name="FILE"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>logs/test.log</file>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<Pattern>
[%-5level] %d{yyyy-MM-dd_HH:mm:ss.SSS} [%thread] %logger{36}:%line - %msg%n
</Pattern>
</encoder>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<FileNamePattern>logs/test.%i.log.zip</FileNamePattern>
<MinIndex>1</MinIndex>
<MaxIndex>10</MaxIndex>
</rollingPolicy>
<triggeringPolicy
class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>2MB</MaxFileSize>
</triggeringPolicy>
</appender>
<logger name="com.javacodegeeks.examples.logbackexample.beans"
level="INFO" additivity="false">
<appender-ref ref="STDOUT" />
</logger>
<!-- By default, the level of the root level is set to DEBUG -->
<root level="TRACE">
<appender-ref ref="STDOUT" />
<appender-ref ref="FILE" />
</root>
</configuration>
Test Class
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.Marker;
import org.slf4j.MarkerFactory;
public class TestLog {
final static Logger log = LoggerFactory.getLogger(TestLog.class.getName());
public static void main(String[] args) {
log.info("info");
log.error("error");
log.warn("warning");
log.debug("debug");
log.trace("trace");
log.info("info {}", "one param");
log.error("error {}", "one param");
log.warn("warning {}", "one param");
log.debug("debug {}", "one param");
log.trace("trace {}", "one param");
log.info("info {} and {}", "param-1", "param-2");
log.error("error {} and {}", "param-1", "param-2");
log.warn("warning {} and {}", "param-1", "param-2");
log.debug("debug {} and {}", "param-1", "param-2");
log.trace("trace {} and {}", "param-1", "param-2");
log.error("Custome Exception ", new Exception("cusotome error msg"));
log.error("ERROR in {} with {}", "className", "inParam", new Exception("custome error msg"));
String s = "Hello";
try {
Integer.valueOf(s);
} catch (NumberFormatException e) {
log.error("Failed to format {}", s, e);
}
Marker fatal = MarkerFactory.getMarker("FATAL");
Logger logger = LoggerFactory.getLogger("aLogger");
try {
Integer i = Integer.valueOf(s);
} catch (NumberFormatException e) {
logger.error(fatal, "Fatal Error", e);
}
logger.debug("Set {1,2} differs from {}", "3");
logger.debug("Set {1,2} differs from {{}}", "3");
logger.debug("Set \\{} differs from {}", "3");
logger.debug("File name is C:\\\\{}.", "file.zip");
}
}
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