diff --git a/Java/Other/mysql-connector-j-8.4.0.jar b/Java/Other/mysql-connector-j-8.4.0.jar
new file mode 100644
index 0000000..8294fe0
Binary files /dev/null and b/Java/Other/mysql-connector-j-8.4.0.jar differ
diff --git a/Java/TodoListApp/.vscode/settings.json b/Java/TodoListApp/.vscode/settings.json
new file mode 100644
index 0000000..e112a70
--- /dev/null
+++ b/Java/TodoListApp/.vscode/settings.json
@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}
diff --git a/Java/TodoListApp/lib/mysql-connector-j-8.4.0.jar b/Java/TodoListApp/lib/mysql-connector-j-8.4.0.jar
new file mode 100644
index 0000000..8294fe0
Binary files /dev/null and b/Java/TodoListApp/lib/mysql-connector-j-8.4.0.jar differ
diff --git a/Java/TodoListApp/src/DatabaseManager.java b/Java/TodoListApp/src/DatabaseManager.java
new file mode 100644
index 0000000..e69de29
diff --git a/Java/TodoListApp/EmptyDescriptionException.java b/Java/TodoListApp/src/EmptyDescriptionException.java
similarity index 85%
rename from Java/TodoListApp/EmptyDescriptionException.java
rename to Java/TodoListApp/src/EmptyDescriptionException.java
index 915c88d..6a593f7 100644
--- a/Java/TodoListApp/EmptyDescriptionException.java
+++ b/Java/TodoListApp/src/EmptyDescriptionException.java
@@ -1,4 +1,4 @@
-package TodoListApp;
+package TodoListApp.src;
 public class EmptyDescriptionException extends Exception {
     public EmptyDescriptionException(String message){
         super(message);
diff --git a/Java/TodoListApp/InvalidIdException.java b/Java/TodoListApp/src/InvalidIdException.java
similarity index 83%
rename from Java/TodoListApp/InvalidIdException.java
rename to Java/TodoListApp/src/InvalidIdException.java
index ef04b7b..16b0192 100644
--- a/Java/TodoListApp/InvalidIdException.java
+++ b/Java/TodoListApp/src/InvalidIdException.java
@@ -1,4 +1,4 @@
-package TodoListApp;
+package TodoListApp.src;
 public class InvalidIdException extends Exception {
     public InvalidIdException(String message){
         super(message);
diff --git a/Java/TodoListApp/TodoItem.java b/Java/TodoListApp/src/TodoItem.java
similarity index 96%
rename from Java/TodoListApp/TodoItem.java
rename to Java/TodoListApp/src/TodoItem.java
index 90dfdbb..26c4411 100644
--- a/Java/TodoListApp/TodoItem.java
+++ b/Java/TodoListApp/src/TodoItem.java
@@ -1,4 +1,4 @@
-package TodoListApp;
+package TodoListApp.src;
 // 待办事项类
 class TodoItem {
     private int id;
diff --git a/Java/TodoListApp/TodoListApp.java b/Java/TodoListApp/src/TodoListApp.java
similarity index 99%
rename from Java/TodoListApp/TodoListApp.java
rename to Java/TodoListApp/src/TodoListApp.java
index 0eef2d5..5877559 100644
--- a/Java/TodoListApp/TodoListApp.java
+++ b/Java/TodoListApp/src/TodoListApp.java
@@ -1,4 +1,4 @@
-package TodoListApp;
+package TodoListApp.src;
 import java.util.Scanner;
 
 // 主类
diff --git a/Java/TodoListApp/TodoListManager.java b/Java/TodoListApp/src/TodoListManager.java
similarity index 93%
rename from Java/TodoListApp/TodoListManager.java
rename to Java/TodoListApp/src/TodoListManager.java
index 16449be..3cbfa69 100644
--- a/Java/TodoListApp/TodoListManager.java
+++ b/Java/TodoListApp/src/TodoListManager.java
@@ -1,4 +1,4 @@
-package TodoListApp;
+package TodoListApp.src;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -6,7 +6,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
-
 // 待办事项管理类
 class TodoListManager {
     private final List<TodoItem> todoList;
@@ -23,16 +22,10 @@ class TodoListManager {
             EmptyDescriptionException e = new EmptyDescriptionException("待办事项的描述不能为空。");
             throw e;
         }
-        try {
-            string sql = "insert into todos (description) values('"+description+"')"
-            system.out.println(sql);
-            Statement stmt = conn.createStatement();
-            stmt.executeUpdate(sql)
-        }
         TodoItem item = new TodoItem(nextId++, description);
         todoList.add(item);
         System.out.println("待办事项已添加： " + item);
-    }o
+    }
 
     // 列出所有待办事项
     public void listTodos() {
diff --git a/Java/TodoListApp/TodoNotFoundException.java b/Java/TodoListApp/src/TodoNotFoundException.java
similarity index 84%
rename from Java/TodoListApp/TodoNotFoundException.java
rename to Java/TodoListApp/src/TodoNotFoundException.java
index c61b72a..8d9ae29 100644
--- a/Java/TodoListApp/TodoNotFoundException.java
+++ b/Java/TodoListApp/src/TodoNotFoundException.java
@@ -1,4 +1,4 @@
-package TodoListApp;
+package TodoListApp.src;
 public class TodoNotFoundException extends Exception {
     public TodoNotFoundException(String message){
         super(message);