Replace @ConditionalOnExpression with OnProperty

Replace where possible all @ConditionalOnExpression annotations with
@ConditionalOnProperty which is both faster to run and more descriptive.

Fixes gh-1685

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/CrshAutoConfiguration.java

@@ -54,8 +54,8 @@ import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
@@ -124,21 +124,21 @@ public class CrshAutoConfiguration {
 	private ShellProperties properties;
 
 	@Bean
-	@ConditionalOnExpression("'${shell.auth:simple}' == 'jaas'")
+	@ConditionalOnProperty(prefix = "shell", name = "auth", havingValue = "jaas")
 	@ConditionalOnMissingBean({ CrshShellAuthenticationProperties.class })
 	public CrshShellAuthenticationProperties jaasAuthenticationProperties() {
 		return new JaasAuthenticationProperties();
 	}
 
 	@Bean
-	@ConditionalOnExpression("'${shell.auth:simple}' == 'key'")
+	@ConditionalOnProperty(prefix = "shell", name = "auth", havingValue = "key")
 	@ConditionalOnMissingBean({ CrshShellAuthenticationProperties.class })
 	public CrshShellAuthenticationProperties keyAuthenticationProperties() {
 		return new KeyAuthenticationProperties();
 	}
 
 	@Bean
-	@ConditionalOnExpression("'${shell.auth:simple}' == 'simple'")
+	@ConditionalOnProperty(prefix = "shell", name = "auth", havingValue = "simple", matchIfMissing = true)
 	@ConditionalOnMissingBean({ CrshShellAuthenticationProperties.class })
 	public CrshShellAuthenticationProperties simpleAuthenticationProperties() {
 		return new SimpleAuthenticationProperties();
@@ -156,7 +156,7 @@ public class CrshAutoConfiguration {
 	 * Class to configure CRaSH to authenticate against Spring Security.
 	 */
 	@Configuration
-	@ConditionalOnExpression("'${shell.auth:spring}' == 'spring'")
+	@ConditionalOnProperty(prefix = "shell", name = "auth", havingValue = "spring", matchIfMissing = true)
 	@ConditionalOnBean({ AuthenticationManager.class })
 	@AutoConfigureAfter(CrshAutoConfiguration.class)
 	public static class AuthenticationManagerAdapterAutoConfiguration {

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointMBeanExportAutoConfiguration.java

@@ -23,12 +23,16 @@ import org.springframework.boot.actuate.endpoint.Endpoint;
 import org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
 import org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ConditionContext;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.type.AnnotatedTypeMetadata;
 import org.springframework.util.StringUtils;
 
 /**
@@ -67,4 +71,21 @@ public class EndpointMBeanExportAutoConfiguration {
 	public MBeanServer mbeanServer() {
 		return new JmxAutoConfiguration().mbeanServer();
 	}
-}
+
+	static class JmxCondition extends SpringBootCondition {
+
+		@Override
+		public ConditionOutcome getMatchOutcome(ConditionContext context,
+				AnnotatedTypeMetadata metadata) {
+			String endpointEnabled = context.getEnvironment().getProperty(
+					"endpoints.jmx.enabled", "true");
+			String jmxEnabled = context.getEnvironment().getProperty(
+					"spring.jmx.enabled", "true");
+			return new ConditionOutcome("true".equalsIgnoreCase(endpointEnabled)
+					&& "true".equalsIgnoreCase(jmxEnabled),
+					"JMX endpoint and JMX enabled");
+
+		}
+
+	}
+}

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointWebMvcAutoConfiguration.java

@@ -47,8 +47,8 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration;
 import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
@@ -146,14 +146,14 @@ public class EndpointWebMvcAutoConfiguration implements ApplicationContextAware,
 
 	@Bean
 	@ConditionalOnBean(EnvironmentEndpoint.class)
-	@ConditionalOnExpression("${endpoints.env.enabled:true}")
+	@ConditionalOnProperty(prefix = "endpoints.env", name = "enabled", matchIfMissing = true)
 	public EnvironmentMvcEndpoint environmentMvcEndpoint(EnvironmentEndpoint delegate) {
 		return new EnvironmentMvcEndpoint(delegate);
 	}
 
 	@Bean
 	@ConditionalOnBean(HealthEndpoint.class)
-	@ConditionalOnExpression("${endpoints.health.enabled:true}")
+	@ConditionalOnProperty(prefix = "endpoints.health", name = "enabled", matchIfMissing = true)
 	public HealthMvcEndpoint healthMvcEndpoint(HealthEndpoint delegate) {
 		HealthMvcEndpoint healthMvcEndpoint = new HealthMvcEndpoint(delegate);
 		if (this.healthMvcEndpointProperties.getMapping() != null) {
@@ -165,14 +165,14 @@ public class EndpointWebMvcAutoConfiguration implements ApplicationContextAware,
 
 	@Bean
 	@ConditionalOnBean(MetricsEndpoint.class)
-	@ConditionalOnExpression("${endpoints.metrics.enabled:true}")
+	@ConditionalOnProperty(prefix = "endpoints.metrics", name = "enabled", matchIfMissing = true)
 	public MetricsMvcEndpoint metricsMvcEndpoint(MetricsEndpoint delegate) {
 		return new MetricsMvcEndpoint(delegate);
 	}
 
 	@Bean
 	@ConditionalOnBean(ShutdownEndpoint.class)
-	@ConditionalOnExpression("${endpoints.shutdown.enabled:false}")
+	@ConditionalOnProperty(prefix = "endpoints.shutdown", name = "enabled", matchIfMissing = true)
 	public ShutdownMvcEndpoint shutdownMvcEndpoint(ShutdownEndpoint delegate) {
 		return new ShutdownMvcEndpoint(delegate);
 	}

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/HealthIndicatorAutoConfiguration.java

@@ -44,8 +44,8 @@ import org.springframework.boot.autoconfigure.AutoConfigureBefore;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
 import org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadata;
 import org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvider;
@@ -96,7 +96,7 @@ public class HealthIndicatorAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnBean(DataSource.class)
-	@ConditionalOnExpression("${health.db.enabled:true}")
+	@ConditionalOnProperty(prefix = "health.db", name = "enabled", matchIfMissing = true)
 	public static class DataSourcesHealthIndicatorConfiguration {
 
 		@Autowired
@@ -143,7 +143,7 @@ public class HealthIndicatorAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnBean(MongoTemplate.class)
-	@ConditionalOnExpression("${health.mongo.enabled:true}")
+	@ConditionalOnProperty(prefix = "health.mongo", name = "enabled", matchIfMissing = true)
 	public static class MongoHealthIndicatorConfiguration {
 
 		@Autowired
@@ -172,7 +172,7 @@ public class HealthIndicatorAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnBean(RedisConnectionFactory.class)
-	@ConditionalOnExpression("${health.redis.enabled:true}")
+	@ConditionalOnProperty(prefix = "health.redis", name = "enabled", matchIfMissing = true)
 	public static class RedisHealthIndicatorConfiguration {
 
 		@Autowired
@@ -202,7 +202,7 @@ public class HealthIndicatorAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnBean(RabbitTemplate.class)
-	@ConditionalOnExpression("${health.rabbit.enabled:true}")
+	@ConditionalOnProperty(prefix = "health.rabbit", name = "enabled", matchIfMissing = true)
 	public static class RabbitHealthIndicatorConfiguration {
 
 		@Autowired
@@ -232,7 +232,7 @@ public class HealthIndicatorAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnBean(SolrServer.class)
-	@ConditionalOnExpression("${health.solr.enabled:true}")
+	@ConditionalOnProperty(prefix = "health.solr", name = "enabled", matchIfMissing = true)
 	public static class SolrHealthIndicatorConfiguration {
 
 		@Autowired
@@ -260,7 +260,7 @@ public class HealthIndicatorAutoConfiguration {
 	}
 
 	@Configuration
-	@ConditionalOnExpression("${health.diskspace.enabled:true}")
+	@ConditionalOnProperty(prefix = "health.diskspace", name = "enabled", matchIfMissing = true)
 	public static class DiskSpaceHealthIndicatorConfiguration {
 
 		@Bean

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/JolokiaAutoConfiguration.java

@@ -25,8 +25,8 @@ import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.AutoConfigureBefore;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -54,7 +54,7 @@ import org.springframework.context.annotation.Configuration;
 @Configuration
 @ConditionalOnWebApplication
 @ConditionalOnClass({ AgentServlet.class })
-@ConditionalOnExpression("${endpoints.jolokia.enabled:true}")
+@ConditionalOnProperty(prefix = "endpoints.jolokia", name = "enabled", matchIfMissing = true)
 @AutoConfigureBefore(ManagementSecurityAutoConfiguration.class)
 @AutoConfigureAfter(EmbeddedServletContainerAutoConfiguration.class)
 @EnableConfigurationProperties(JolokiaProperties.class)

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/ManagementSecurityAutoConfiguration.java

@@ -30,10 +30,12 @@ import org.springframework.boot.actuate.endpoint.mvc.MvcEndpoint;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.AutoConfigureBefore;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
 import org.springframework.boot.autoconfigure.security.AuthenticationManagerConfiguration;
 import org.springframework.boot.autoconfigure.security.FallbackWebSecurityAutoConfiguration;
 import org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration;
@@ -44,8 +46,11 @@ import org.springframework.boot.autoconfigure.web.ErrorController;
 import org.springframework.boot.autoconfigure.web.ServerProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.annotation.Order;
+import org.springframework.core.type.AnnotatedTypeMetadata;
 import org.springframework.security.config.annotation.web.WebSecurityConfigurer;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.builders.WebSecurity;
@@ -165,16 +170,35 @@ public class ManagementSecurityAutoConfiguration {
 	}
 
 	@Configuration
-	@ConditionalOnExpression("${management.security.enabled:true} && !${security.basic.enabled:true}")
 	@ConditionalOnMissingBean(WebSecurityConfiguration.class)
 	@ConditionalOnWebApplication
+	@Conditional(WebSecurityEnablerCondition.class)
 	@EnableWebSecurity
 	protected static class WebSecurityEnabler extends AuthenticationManagerConfiguration {
 	}
 
+	/**
+	 * WebSecurityEnabler condition
+	 */
+	static class WebSecurityEnablerCondition extends SpringBootCondition {
+
+		@Override
+		public ConditionOutcome getMatchOutcome(ConditionContext context,
+				AnnotatedTypeMetadata metadata) {
+			String managementEnabled = context.getEnvironment().getProperty(
+					"management.security.enabled", "true");
+			String basicEnabled = context.getEnvironment().getProperty(
+					"security.basic.enabled", "true");
+			return new ConditionOutcome("true".equalsIgnoreCase(managementEnabled)
+					&& !"true".equalsIgnoreCase(basicEnabled),
+					"Management security enabled and basic disabled");
+		}
+
+	}
+
 	@Configuration
 	@ConditionalOnMissingBean({ ManagementWebSecurityConfigurerAdapter.class })
-	@ConditionalOnExpression("${management.security.enabled:true}")
+	@ConditionalOnProperty(prefix = "management.security", name = "enabled", matchIfMissing = true)
 	@ConditionalOnWebApplication
 	@Order(ManagementServerProperties.BASIC_AUTH_ORDER)
 	protected static class ManagementWebSecurityConfigurerAdapter extends

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

@@ -25,8 +25,8 @@ import org.springframework.amqp.rabbit.core.RabbitTemplate;
 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.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -80,7 +80,7 @@ import com.rabbitmq.client.Channel;
 public class RabbitAutoConfiguration {
 
 	@Bean
-	@ConditionalOnExpression("${spring.rabbitmq.dynamic:true}")
+	@ConditionalOnProperty(prefix = "spring.rabbitmq", name = "dynamic", matchIfMissing = true)
 	@ConditionalOnMissingBean(AmqpAdmin.class)
 	public AmqpAdmin amqpAdmin(CachingConnectionFactory connectionFactory) {
 		return new RabbitAdmin(connectionFactory);

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/ConditionalOnProperty.java

@@ -94,7 +94,7 @@ public @interface ConditionalOnProperty {
 	String prefix() default "";
 
 	/**
-	 * The name of the properties to test.If a prefix has been defined, it is applied to
+	 * The name of the properties to test. If a prefix has been defined, it is applied to
 	 * compute the full key of each property. For instance if the prefix is
 	 * {@code app.config} and one value is {@code my-value}, the fully key would be
 	 * {@code app.config.my-value}

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

@@ -26,8 +26,8 @@ import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.data.jpa.EntityManagerFactoryDependsOnPostProcessor;
 import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
 import org.springframework.boot.context.properties.ConfigurationProperties;
@@ -51,7 +51,7 @@ import org.springframework.util.Assert;
 @Configuration
 @ConditionalOnClass(Flyway.class)
 @ConditionalOnBean(DataSource.class)
-@ConditionalOnExpression("${flyway.enabled:true}")
+@ConditionalOnProperty(prefix = "flyway", name = "enabled", matchIfMissing = true)
 @AutoConfigureAfter(DataSourceAutoConfiguration.class)
 public class FlywayAutoConfiguration {
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/liquibase/LiquibaseAutoConfiguration.java

@@ -27,8 +27,8 @@ import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.data.jpa.EntityManagerFactoryDependsOnPostProcessor;
 import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
 import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
@@ -54,7 +54,7 @@ import org.springframework.util.Assert;
 @Configuration
 @ConditionalOnClass(SpringLiquibase.class)
 @ConditionalOnBean(DataSource.class)
-@ConditionalOnExpression("${liquibase.enabled:true}")
+@ConditionalOnProperty(prefix = "liquibase", name = "enabled", matchIfMissing = true)
 @AutoConfigureAfter(DataSourceAutoConfiguration.class)
 public class LiquibaseAutoConfiguration {
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/FallbackWebSecurityAutoConfiguration.java

@@ -19,8 +19,8 @@ package org.springframework.boot.autoconfigure.security;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfiguration;
@@ -35,7 +35,7 @@ import org.springframework.security.config.annotation.web.configuration.WebSecur
  *
  * @author Dave Syer
  */
-@ConditionalOnExpression("!${security.basic.enabled:true}")
+@ConditionalOnProperty(prefix = "security.basic", name = "enabled", havingValue = "false")
 @ConditionalOnBean(WebSecurityConfigurerAdapter.class)
 @ConditionalOnClass(EnableWebSecurity.class)
 @ConditionalOnMissingBean(WebSecurityConfiguration.class)

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/SpringBootWebSecurityConfiguration.java

@@ -25,9 +25,9 @@ import javax.servlet.http.HttpServletRequest;
 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.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.boot.autoconfigure.security.SecurityProperties.Headers;
 import org.springframework.boot.autoconfigure.web.ErrorController;
@@ -192,8 +192,8 @@ public class SpringBootWebSecurityConfiguration {
 
 	}
 
-	@ConditionalOnExpression("!${security.basic.enabled:true}")
 	@Configuration
+	@ConditionalOnProperty(prefix = "security.basic", name = "enabled", havingValue = "false")
 	@Order(SecurityProperties.BASIC_AUTH_ORDER)
 	protected static class ApplicationNoWebSecurityConfigurerAdapter extends
 			WebSecurityConfigurerAdapter {
@@ -208,8 +208,8 @@ public class SpringBootWebSecurityConfiguration {
 		}
 	}
 
-	@ConditionalOnExpression("${security.basic.enabled:true}")
 	@Configuration
+	@ConditionalOnProperty(prefix = "security.basic", name = "enabled", matchIfMissing = true)
 	@Order(SecurityProperties.BASIC_AUTH_ORDER)
 	protected static class ApplicationWebSecurityConfigurerAdapter extends
 			WebSecurityConfigurerAdapter {

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

@@ -30,8 +30,8 @@ import org.springframework.boot.autoconfigure.AutoConfigureBefore;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.boot.autoconfigure.condition.SearchStrategy;
 import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
@@ -97,7 +97,7 @@ public class ErrorMvcAutoConfiguration implements EmbeddedServletContainerCustom
 	}
 
 	@Configuration
-	@ConditionalOnExpression("${error.whitelabel.enabled:true}")
+	@ConditionalOnProperty(prefix = "error.whitelable", name = "enabled", matchIfMissing = true)
 	@Conditional(ErrorTemplateMissingCondition.class)
 	protected static class WhitelabelErrorViewConfiguration {
 

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

@@ -22,8 +22,8 @@ import javax.servlet.Servlet;
 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.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.embedded.EmbeddedWebApplicationContext;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
@@ -46,7 +46,7 @@ import org.springframework.web.multipart.support.StandardServletMultipartResolve
 @Configuration
 @ConditionalOnClass({ Servlet.class, StandardServletMultipartResolver.class,
 		MultipartConfigElement.class })
-@ConditionalOnExpression("${multipart.enabled:true}")
+@ConditionalOnProperty(prefix = "multipart", name = "enabled", matchIfMissing = true)
 @EnableConfigurationProperties(MultipartProperties.class)
 public class MultipartAutoConfiguration {