Remove unnecessary field initialization in @ConfigurationProperties class

Signed-off-by: Yanming Zhou <[email protected]>

Author: quaff

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/jdbc/DataSourceHealthIndicatorProperties.java

@@ -32,7 +32,7 @@ public class DataSourceHealthIndicatorProperties {
 	 * Whether to ignore AbstractRoutingDataSources when creating database health
 	 * indicators.
 	 */
-	private boolean ignoreRoutingDataSources = false;
+	private boolean ignoreRoutingDataSources;
 
 	public boolean isIgnoreRoutingDataSources() {
 		return this.ignoreRoutingDataSources;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/elastic/ElasticProperties.java

@@ -83,7 +83,7 @@ public class ElasticProperties extends StepRegistryProperties {
 	 * Whether to enable _source in the default index template when auto-creating the
 	 * index.
 	 */
-	private boolean enableSource = false;
+	private boolean enableSource;
 
 	public String getHost() {
 		return this.host;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/stackdriver/StackdriverProperties.java

@@ -52,7 +52,7 @@ public class StackdriverProperties extends StepRegistryProperties {
 	 * published as the GAUGE MetricKind. When true, counter metrics are published as the
 	 * CUMULATIVE MetricKind.
 	 */
-	private boolean useSemanticMetricTypes = false;
+	private boolean useSemanticMetricTypes;
 
 	/**
 	 * Prefix for metric type. Valid prefixes are described in the Google Cloud

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/TracingProperties.java

@@ -281,7 +281,7 @@ public static class Brave {
 		 * between client and server spans. Requires B3 propagation and a compatible
 		 * backend.
 		 */
-		private boolean spanJoiningSupported = false;
+		private boolean spanJoiningSupported;
 
 		public boolean isSpanJoiningSupported() {
 			return this.spanJoiningSupported;

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java

@@ -937,7 +937,7 @@ public static class DirectContainer extends AmqpContainer {
 		 * Whether to fail if the queues declared by the container are not available on
 		 * the broker.
 		 */
-		private boolean missingQueuesFatal = false;
+		private boolean missingQueuesFatal;
 
 		public Integer getConsumersPerQueue() {
 			return this.consumersPerQueue;

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/context/MessageSourceProperties.java

@@ -74,13 +74,13 @@ public class MessageSourceProperties {
 	 * Whether to always apply the MessageFormat rules, parsing even messages without
 	 * arguments.
 	 */
-	private boolean alwaysUseMessageFormat = false;
+	private boolean alwaysUseMessageFormat;
 
 	/**
 	 * Whether to use the message code as the default message instead of throwing a
 	 * "NoSuchMessageException". Recommended during development only.
 	 */
-	private boolean useCodeAsDefaultMessage = false;
+	private boolean useCodeAsDefaultMessage;
 
 	public List<String> getBasename() {
 		return this.basename;

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/web/SpringDataWebProperties.java

@@ -60,7 +60,7 @@ public static class Pageable {
 		 * Whether to expose and assume 1-based page number indexes. Defaults to "false",
 		 * meaning a page number of 0 in the request equals the first page.
 		 */
-		private boolean oneIndexedParameters = false;
+		private boolean oneIndexedParameters;
 
 		/**
 		 * General prefix to be prepended to the page number and page size parameters.

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/elasticsearch/ElasticsearchProperties.java

@@ -60,7 +60,7 @@ public class ElasticsearchProperties {
 	/**
 	 * Whether to enable socket keep alive between client and Elasticsearch.
 	 */
-	private boolean socketKeepAlive = false;
+	private boolean socketKeepAlive;
 
 	/**
 	 * Prefix added to the path of every request sent to Elasticsearch.

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/flyway/FlywayProperties.java

@@ -247,7 +247,7 @@ public class FlywayProperties {
 	 * Whether to validate migrations and callbacks whose scripts do not obey the correct
 	 * naming convention.
 	 */
-	private boolean validateMigrationNaming = false;
+	private boolean validateMigrationNaming;
 
 	/**
 	 * Whether to automatically call validate when performing a migration.

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/graphql/GraphQlProperties.java

@@ -180,7 +180,7 @@ public static class Printer {
 			 * Whether the endpoint that prints the schema is enabled. Schema is available
 			 * under spring.graphql.path + "/schema".
 			 */
-			private boolean enabled = false;
+			private boolean enabled;
 
 			public boolean isEnabled() {
 				return this.enabled;
@@ -204,7 +204,7 @@ public static class Graphiql {
 		/**
 		 * Whether the default GraphiQL UI is enabled.
 		 */
-		private boolean enabled = false;
+		private boolean enabled;
 
 		public String getPath() {
 			return this.path;