Introduce configurable logging.pattern.dateformat

Add configurable logger dateformat support for Logback and Log4j2.

Closes gh-8516

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -48,6 +48,7 @@ content into your application; rather pick only the properties that you need.
 	logging.pattern.console= # Appender pattern for output to the console. Only supported with the default logback setup.
 	logging.pattern.file= # Appender pattern for output to the file. Only supported with the default logback setup.
 	logging.pattern.level= # Appender pattern for log level (default %5p). Only supported with the default logback setup.
+	logging.pattern.dateformat= # Appender pattern for log dateformat (default yyyy-MM-dd HH:mm:ss.SSS). Only supported with the default logback setup.
 	logging.register-shutdown-hook=false # Register a shutdown hook for the logging system when it is initialized.
 
 	# AOP

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystemProperties.java

@@ -79,6 +79,11 @@ public class LoggingSystemProperties {
 	 */
 	public static final String LOG_LEVEL_PATTERN = "LOG_LEVEL_PATTERN";
 
+	/**
+	 * The name of the System property that contains the log date-format pattern.
+	 */
+	public static final String LOG_DATEFORMAT_PATTERN = "LOG_DATEFORMAT_PATTERN";
+
 	private final Environment environment;
 
 	/**
@@ -103,6 +108,7 @@ public class LoggingSystemProperties {
 		setSystemProperty(resolver, FILE_MAX_HISTORY, "file.max-history");
 		setSystemProperty(resolver, FILE_MAX_SIZE, "file.max-size");
 		setSystemProperty(resolver, LOG_LEVEL_PATTERN, "pattern.level");
+		setSystemProperty(resolver, LOG_DATEFORMAT_PATTERN, "pattern.dateformat");
 		setSystemProperty(PID_KEY, new ApplicationPid().toString());
 		if (logFile != null) {
 			logFile.applyToSystemProperties();

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java

@@ -50,12 +50,12 @@ import org.springframework.util.ReflectionUtils;
  */
 class DefaultLogbackConfiguration {
 
-	private static final String CONSOLE_LOG_PATTERN = "%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} "
+	private static final String CONSOLE_LOG_PATTERN = "%clr(%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}}){faint} "
 			+ "%clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} "
 			+ "%clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} "
 			+ "%clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}";
 
-	private static final String FILE_LOG_PATTERN = "%d{yyyy-MM-dd HH:mm:ss.SSS} "
+	private static final String FILE_LOG_PATTERN = "%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} "
 			+ "${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}";
 
 	private static final String MAX_FILE_SIZE = "10MB";

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/LogbackLoggingSystem.java

@@ -43,6 +43,7 @@ import org.springframework.boot.logging.LoggerConfiguration;
 import org.springframework.boot.logging.LoggingInitializationContext;
 import org.springframework.boot.logging.LoggingSystem;
 import org.springframework.boot.logging.Slf4JLoggingSystem;
+import org.springframework.core.env.Environment;
 import org.springframework.util.Assert;
 import org.springframework.util.ResourceUtils;
 import org.springframework.util.StringUtils;
@@ -125,9 +126,11 @@ public class LogbackLoggingSystem extends Slf4JLoggingSystem {
 		LoggerContext context = getLoggerContext();
 		stopAndReset(context);
 		LogbackConfigurator configurator = new LogbackConfigurator(context);
-		context.putProperty("LOG_LEVEL_PATTERN",
-				initializationContext.getEnvironment().resolvePlaceholders(
-						"${logging.pattern.level:${LOG_LEVEL_PATTERN:%5p}}"));
+		Environment environment = initializationContext.getEnvironment();
+		context.putProperty("LOG_LEVEL_PATTERN", environment.resolvePlaceholders(
+				"${logging.pattern.level:${LOG_LEVEL_PATTERN:%5p}}"));
+		context.putProperty("LOG_DATEFORMAT_PATTERN", environment.resolvePlaceholders(
+				"${logging.pattern.dateformat:${LOG_DATEFORMAT_PATTERN:yyyy-MM-dd HH:mm:ss.SSS}}"));
 		new DefaultLogbackConfiguration(initializationContext, logFile)
 				.apply(configurator);
 		context.setPackagingDataEnabled(true);

spring-boot-project/spring-boot/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -94,14 +94,14 @@
     "type": "java.lang.String",
     "description": "Appender pattern for output to the console. Only supported with the default logback setup.",
     "sourceType": "org.springframework.boot.context.logging.LoggingApplicationListener",
-    "defaultValue": "%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}"
+    "defaultValue": "%clr(%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}"
   },
   {
     "name": "logging.pattern.file",
     "type": "java.lang.String",
     "description": "Appender pattern for output to the file. Only supported with the default logback setup.",
     "sourceType": "org.springframework.boot.context.logging.LoggingApplicationListener",
-    "defaultValue": "%d{yyyy-MM-dd HH:mm:ss.SSS} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}"
+    "defaultValue": "%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}"
   },
   {
     "name": "logging.pattern.level",
@@ -109,6 +109,12 @@
     "description": "Appender pattern for log level (default %5p). Only supported with the default logback setup.",
     "sourceType": "org.springframework.boot.context.logging.LoggingApplicationListener"
   },
+  {
+    "name": "logging.pattern.dateformat",
+    "type": "java.lang.String",
+    "description": "Appender pattern for log dateformat (default yyyy-MM-dd HH:mm:ss.SSS). Only supported with the default logback setup.",
+    "sourceType": "org.springframework.boot.logging.LoggingApplicationListener"
+  },
   {
     "name": "logging.path",
     "type": "java.lang.String",

spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/log4j2/log4j2-file.xml

@@ -4,8 +4,10 @@
 		<Property name="PID">????</Property>
 		<Property name="LOG_EXCEPTION_CONVERSION_WORD">%xwEx</Property>
 		<Property name="LOG_LEVEL_PATTERN">%5p</Property>
-		<Property name="CONSOLE_LOG_PATTERN">%clr{%d{yyyy-MM-dd HH:mm:ss.SSS}}{faint} %clr{${LOG_LEVEL_PATTERN}} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
-		<Property name="FILE_LOG_PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} ${LOG_LEVEL_PATTERN} ${sys:PID} --- [%t] %-40.40c{1.} : %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
+		<Property name="LOG_DATEFORMAT_PATTERN">yyyy-MM-dd HH:mm:ss.SSS</Property>
+		<Property name="CONSOLE_LOG_PATTERN">%clr{%d{${LOG_DATEFORMAT_PATTERN}}}{faint} %clr{${LOG_LEVEL_PATTERN}} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
+		<Property name="FILE_LOG_PATTERN">%d{${LOG_DATEFORMAT_PATTERN}} ${LOG_LEVEL_PATTERN} ${sys:PID} --- [%t] %-40.40c{1.} : %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
+
 	</Properties>
 	<Appenders>
 		<Console name="Console" target="SYSTEM_OUT" follow="true">

spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/log4j2/log4j2.xml

@@ -4,8 +4,9 @@
 		<Property name="PID">????</Property>
 		<Property name="LOG_EXCEPTION_CONVERSION_WORD">%xwEx</Property>
 		<Property name="LOG_LEVEL_PATTERN">%5p</Property>
-		<Property name="CONSOLE_LOG_PATTERN">%clr{%d{yyyy-MM-dd HH:mm:ss.SSS}}{faint} %clr{${LOG_LEVEL_PATTERN}} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
-		<Property name="FILE_LOG_PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} ${LOG_LEVEL_PATTERN} ${sys:PID} --- [%t] %-40.40c{1.} : %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
+		<Property name="LOG_DATEFORMAT_PATTERN">yyyy-MM-dd HH:mm:ss.SSS</Property>
+		<Property name="CONSOLE_LOG_PATTERN">%clr{%d{${LOG_DATEFORMAT_PATTERN}}}{faint} %clr{${LOG_LEVEL_PATTERN}} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
+		<Property name="FILE_LOG_PATTERN">%d{${LOG_DATEFORMAT_PATTERN}} ${LOG_LEVEL_PATTERN} ${sys:PID} --- [%t] %-40.40c{1.} : %m%n${sys:LOG_EXCEPTION_CONVERSION_WORD}</Property>
 	</Properties>
 	<Appenders>
 		<Console name="Console" target="SYSTEM_OUT" follow="true">

spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/defaults.xml

@@ -9,8 +9,8 @@ initialization performed by Boot
 	<conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
 	<conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />
 	<conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter" />
-	<property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
-	<property name="FILE_LOG_PATTERN" value="${FILE_LOG_PATTERN:-%d{yyyy-MM-dd HH:mm:ss.SSS} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
+	<property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
+	<property name="FILE_LOG_PATTERN" value="${FILE_LOG_PATTERN:-%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
 
 	<appender name="DEBUG_LEVEL_REMAPPER" class="org.springframework.boot.logging.logback.LevelRemappingAppender">
 		<destinationLogger>org.springframework.boot</destinationLogger>

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/logging/logback/LogbackLoggingSystemTests.java

@@ -440,6 +440,20 @@ public class LogbackLoggingSystemTests extends AbstractLoggingSystemTests {
 		verify(listener, times(2)).onReset(loggerContext);
 	}
 
+	@Test
+	public void testDateformatPatternProperty() {
+		MockEnvironment environment = new MockEnvironment();
+		environment.setProperty("logging.pattern.dateformat",
+				"yyyy-MM-dd'T'hh:mm:ss.SSSZ");
+		LoggingInitializationContext loggingInitializationContext = new LoggingInitializationContext(
+				environment);
+		this.loggingSystem.initialize(loggingInitializationContext, null, null);
+		this.logger.info("Hello world");
+		String output = this.output.toString().trim();
+		assertThat(getLineWithText(output, "Hello world"))
+				.containsPattern("\\d{4}-\\d{2}\\-\\d{2}T\\d{2}:\\d{2}:\\d{2}");
+	}
+
 	private static Logger getRootLogger() {
 		ILoggerFactory factory = StaticLoggerBinder.getSingleton().getLoggerFactory();
 		LoggerContext context = (LoggerContext) factory;