diff --git "a/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/2.\347\274\226\350\257\221Java\347\250\213\345\272\217/app.json" "b/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/2.\347\274\226\350\257\221Java\347\250\213\345\272\217/app.json"
index 28bfa4441f6ff5fbe54d9b991eea5bb2493ecd41..1579d2c92c3560752a9018db5a973cd03853a934 100644
--- "a/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/2.\347\274\226\350\257\221Java\347\250\213\345\272\217/app.json"
+++ "b/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/2.\347\274\226\350\257\221Java\347\250\213\345\272\217/app.json"
@@ -2,5 +2,6 @@
   "type": "code_options",
   "author": "ccat",
   "source": "app.md",
-  "notebook_enable": false
+  "notebook_enable": false,
+  "exercise_id": "d40c7c4707714fc99731cea30a515d37"
 }
\ No newline at end of file
diff --git "a/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/5.Maven\345\237\272\347\241\200/MavenDesc.md" "b/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/5.Maven\345\237\272\347\241\200/MavenDesc.md"
index 073418743e633b4e5e8d811ac15ecfa7296c1332..53b9a3946c785effa1139447bfd501b35fe1ca52 100644
--- "a/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/5.Maven\345\237\272\347\241\200/MavenDesc.md"
+++ "b/data/1.Java\345\210\235\351\230\266/1.Java\346\246\202\350\247\210/5.Maven\345\237\272\347\241\200/MavenDesc.md"
@@ -7,7 +7,7 @@
 ## 答案
 
 ```
-以上说法均正确
+所有选项均正确
 ```
 
 ## 选项
diff --git a/data/tree.json b/data/tree.json
index ce8461f6ff1c8bba003f65992c101f726fc96ca7..6fa76bab0f6cb342d972d616f9625c3b4ec43c96 100644
--- a/data/tree.json
+++ b/data/tree.json
@@ -27,21 +27,29 @@
                   {
                     "编译Java程序": {
                       "node_id": "java-3c458ea864a540468e0b10cd82df0662",
-                      "keywords": [],
+                      "keywords": [
+                        "hello world",
+                        "app"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "Java的运行机制": {
                       "node_id": "java-2af8b309ed874ad6bd06c6f2363d098d",
-                      "keywords": [],
+                      "keywords": [
+                        "runtime",
+                        "运行机制"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "根据CLASSPATH环境变量定位类": {
                       "node_id": "java-4ddfc05dbbe54300905f404c1ed1b4f9",
-                      "keywords": [],
+                      "keywords": [
+                        "classpath"
+                      ],
                       "children": []
                     }
                   },
@@ -86,7 +94,8 @@
                     "Java中的关键字": {
                       "node_id": "java-e16c7862e7cc4feeb54cf6a42dd65cef",
                       "keywords": [
-                        "关键字"
+                        "关键字",
+                        "keyword"
                       ],
                       "children": []
                     }