Support values other than String in /env

Fixes gh-9079

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/EnvironmentEndpointTests.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.endpoint;
 
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
 
 import org.junit.After;
@@ -29,6 +30,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.CompositePropertySource;
 import org.springframework.core.env.MapPropertySource;
+import org.springframework.core.env.MutablePropertySources;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -255,6 +257,24 @@ public class EnvironmentEndpointTests extends AbstractEndpointTests<EnvironmentE
 		assertThat(testProperties.get("my.foo")).isEqualTo("http://${bar.password}://hello");
 	}
 
+	@SuppressWarnings("unchecked")
+	@Test
+	public void propertyWithTypeOtherThanStringShouldNotFail() throws Exception {
+		this.context = new AnnotationConfigApplicationContext();
+		MutablePropertySources propertySources = this.context.getEnvironment().getPropertySources();
+		Map<String, Object> source = new HashMap<String, Object>();
+		source.put("foo", Collections.singletonMap("bar", "baz"));
+		propertySources.addFirst(new MapPropertySource("test", source));
+		this.context.register(Config.class);
+		this.context.refresh();
+		EnvironmentEndpoint report = getEndpointBean();
+		Map<String, Object> env = report.invoke();
+		Map<String, Object> testProperties = (Map<String, Object>) env
+				.get("test");
+		Map<String, String> foo = (Map<String, String>) testProperties.get("foo");
+		assertThat(foo.get("bar")).isEqualTo("baz");
+	}
+
 	@Configuration
 	@EnableConfigurationProperties
 	public static class Config {

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/EnvironmentMvcEndpointTests.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.actuate.endpoint.mvc;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -39,6 +40,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MapPropertySource;
+import org.springframework.core.env.MutablePropertySources;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
 import org.springframework.test.annotation.DirtiesContext;
@@ -160,6 +162,18 @@ public class EnvironmentMvcEndpointTests {
 				.andExpect(content().string(containsString("\"my.foo\":\"******\"")));
 	}
 
+	@SuppressWarnings("unchecked")
+	@Test
+	public void propertyWithTypeOtherThanStringShouldNotFail() throws Exception {
+		ConfigurableEnvironment environment = (ConfigurableEnvironment) this.context.getEnvironment();
+		MutablePropertySources propertySources = environment.getPropertySources();
+		Map<String, Object> source = new HashMap<String, Object>();
+		source.put("foo", Collections.singletonMap("bar", "baz"));
+		propertySources.addFirst(new MapPropertySource("test", source));
+		this.mvc.perform(get("/env/foo.*")).andExpect(status().isOk())
+				.andExpect(content().string("{\"foo\":{\"bar\":\"baz\"}}"));
+	}
+
 	@Configuration
 	@Import({ JacksonAutoConfiguration.class,
 			HttpMessageConvertersAutoConfiguration.class, WebMvcAutoConfiguration.class,