Allow pretty printed JSON output (nicer for demos and easier to read)

Defaults to false

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/HttpMessageConvertersAutoConfiguration.java

@@ -29,6 +29,8 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Primary;
@@ -42,6 +44,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
  * {@link EnableAutoConfiguration Auto-configuration} for {@link HttpMessageConverter}s.
  * 
  * @author Dave Syer
+ * @author Christian Dupuis
  */
 @Configuration
 @ConditionalOnClass(HttpMessageConverter.class)
@@ -60,8 +63,12 @@ public class HttpMessageConvertersAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnClass(ObjectMapper.class)
+	@EnableConfigurationProperties(ObjectMappersProperties.class)
 	protected static class ObjectMappers {
 
+		@Autowired
+		private ObjectMappersProperties properties = new ObjectMappersProperties();
+
 		@Autowired
 		private ListableBeanFactory beanFactory;
 
@@ -90,9 +97,27 @@ public class HttpMessageConvertersAutoConfiguration {
 				ObjectMapper objectMapper) {
 			MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
 			converter.setObjectMapper(objectMapper);
+			converter.setPrettyPrint(this.properties.isJsonPrettyPrint());
 			return converter;
 		}
 
 	}
 
+	/**
+	 * {@link ConfigurationProperties} to configure {@link HttpMessageConverter}s.
+	 */
+	@ConfigurationProperties(name = "http.mappers", ignoreUnknownFields = false)
+	public static class ObjectMappersProperties {
+
+		private boolean jsonPrettyPrint = false;
+
+		public void setJsonPrettyPrint(boolean jsonPrettyPrint) {
+			this.jsonPrettyPrint = jsonPrettyPrint;
+		}
+
+		public boolean isJsonPrettyPrint() {
+			return this.jsonPrettyPrint;
+		}
+	}
+
 }