Index: build.gradle
===================================================================
diff -u -r27959 -r27970
--- build.gradle	(.../build.gradle)	(revision 27959)
+++ build.gradle	(.../build.gradle)	(revision 27970)
@@ -499,7 +499,9 @@
 	    
 	    compile group: 'javax.servlet', name: 'jstl', version:'1.2'
 	    compile group: 'javax.servlet.jsp', name: 'jsp-api', version:'2.2'
-	    
+
+		compile group: 'javax.websocket', name: 'javax.websocket-api', version:'1.1'	    	    
+
 	    compile group: 'junit', name: 'junit', version:'4.12'
 	    // 缩略图生成库
 	    compile group: 'net.coobird', name: 'thumbnailator', version: '0.4.8'