Correctly decode URL coming into the Jolokia endpoint

fixes #869

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/mvc/JolokiaMvcEndpoint.java

@@ -36,6 +36,7 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.context.ServletContextAware;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.ServletWrappingController;
+import org.springframework.web.util.UrlPathHelper;
 
 /**
  * {@link MvcEndpoint} to expose Jolokia.
@@ -124,15 +125,18 @@ public class JolokiaMvcEndpoint implements MvcEndpoint, InitializingBean,
 	private static class PathStripper extends HttpServletRequestWrapper {
 
 		private final String path;
+		private final UrlPathHelper urlPathHelper;
 
 		public PathStripper(HttpServletRequest request, String path) {
 			super(request);
 			this.path = path;
+			this.urlPathHelper = new UrlPathHelper();
 		}
 
 		@Override
 		public String getPathInfo() {
-			String value = super.getRequestURI();
+			String value = this.urlPathHelper.decodeRequestString(
+					(HttpServletRequest) getRequest(), super.getRequestURI());
 			if (value.contains(this.path)) {
 				value = value.substring(value.indexOf(this.path) + this.path.length());
 			}
@@ -145,6 +149,6 @@ public class JolokiaMvcEndpoint implements MvcEndpoint, InitializingBean,
 			}
 			return value;
 		}
-
 	}
+
 }