Upgrade to Jackson 2.12.1

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration.java

@@ -32,6 +32,7 @@
 import com.fasterxml.jackson.annotation.PropertyAccessor;
 import com.fasterxml.jackson.databind.Module;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.PropertyNamingStrategy;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
@@ -257,10 +258,10 @@ private void configurePropertyNamingStrategyClass(Jackson2ObjectMapperBuilder bu
 			private void configurePropertyNamingStrategyField(Jackson2ObjectMapperBuilder builder, String fieldName) {
 				// Find the field (this way we automatically support new constants
 				// that may be added by Jackson in the future)
-				Field field = ReflectionUtils.findField(PropertyNamingStrategy.class, fieldName,
+				Field field = ReflectionUtils.findField(PropertyNamingStrategies.class, fieldName,
 						PropertyNamingStrategy.class);
 				Assert.notNull(field, () -> "Constant named '" + fieldName + "' not found on "
-						+ PropertyNamingStrategy.class.getName());
+						+ PropertyNamingStrategies.class.getName());
 				try {
 					builder.propertyNamingStrategy((PropertyNamingStrategy) field.get(null));
 				}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonProperties.java

@@ -50,7 +50,7 @@ public class JacksonProperties {
 	private String dateFormat;
 
 	/**
-	 * One of the constants on Jackson's PropertyNamingStrategy. Can also be a
+	 * One of the constants on Jackson's PropertyNamingStrategies. Can also be a
 	 * fully-qualified class name of a PropertyNamingStrategy subclass.
 	 */
 	private String propertyNamingStrategy;

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfigurationTests.java

@@ -37,7 +37,7 @@
 import com.fasterxml.jackson.databind.MapperFeature;
 import com.fasterxml.jackson.databind.Module;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.PropertyNamingStrategy.SnakeCaseStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies.SnakeCaseStrategy;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.module.SimpleModule;
@@ -132,7 +132,7 @@ void customPropertyNamingStrategyField() {
 	@Test
 	void customPropertyNamingStrategyClass() {
 		this.contextRunner.withPropertyValues(
-				"spring.jackson.property-naming-strategy:com.fasterxml.jackson.databind.PropertyNamingStrategy.SnakeCaseStrategy")
+				"spring.jackson.property-naming-strategy:com.fasterxml.jackson.databind.PropertyNamingStrategies.SnakeCaseStrategy")
 				.run((context) -> {
 					ObjectMapper mapper = context.getBean(ObjectMapper.class);
 					assertThat(mapper.getPropertyNamingStrategy()).isInstanceOf(SnakeCaseStrategy.class);

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -493,7 +493,7 @@ bom {
 			]
 		}
 	}
-	library("Jackson Bom", "2.11.3") {
+	library("Jackson Bom", "2.12.0") {
 		group("com.fasterxml.jackson") {
 			imports = [
 				"jackson-bom"

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/json/SharedObjectMapper.java

@@ -18,7 +18,7 @@
 
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
 
@@ -37,7 +37,7 @@ public final class SharedObjectMapper {
 		objectMapper.registerModule(new ParameterNamesModule());
 		objectMapper.enable(SerializationFeature.INDENT_OUTPUT);
 		objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-		objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CAMEL_CASE);
+		objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.LOWER_CAMEL_CASE);
 		INSTANCE = objectMapper;
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/json/SharedObjectMapperTests.java

@@ -18,6 +18,7 @@
 
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.PropertyNamingStrategy;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
@@ -42,9 +43,9 @@ void getReturnsConfiguredObjectMapper() {
 		assertThat(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES
 				.enabledIn(mapper.getDeserializationConfig().getDeserializationFeatures())).isFalse();
 		assertThat(mapper.getSerializationConfig().getPropertyNamingStrategy())
-				.isEqualTo(PropertyNamingStrategy.LOWER_CAMEL_CASE);
+				.isEqualTo(PropertyNamingStrategies.LOWER_CAMEL_CASE);
 		assertThat(mapper.getDeserializationConfig().getPropertyNamingStrategy())
-				.isEqualTo(PropertyNamingStrategy.LOWER_CAMEL_CASE);
+				.isEqualTo(PropertyNamingStrategies.LOWER_CAMEL_CASE);
 	}
 
 }