diff --git a/.idea/git_toolbox_blame.xml b/.idea/git_toolbox_blame.xml
new file mode 100644
index 0000000..10340b3
--- /dev/null
+++ b/.idea/git_toolbox_blame.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GitToolBoxBlameSettings">
+    <option name="showEditorInlineBlameOverride">
+      <BoolValueOverride>
+        <option name="enabled" value="true" />
+      </BoolValueOverride>
+    </option>
+    <option name="version" value="2" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
index 9ee3114..c915ea4 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -2,6 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
+      <module fileurl="file://$PROJECT_DIR$/Chapter01/Chapter01.iml" filepath="$PROJECT_DIR$/Chapter01/Chapter01.iml" />
       <module fileurl="file://$PROJECT_DIR$/.idea/ScoreManagementSystem25-12A.iml" filepath="$PROJECT_DIR$/.idea/ScoreManagementSystem25-12A.iml" />
       <module fileurl="file://$PROJECT_DIR$/grademanagement/grademanagement.iml" filepath="$PROJECT_DIR$/grademanagement/grademanagement.iml" />
       <module fileurl="file://$PROJECT_DIR$/grademanagement-MyBatisProject/grademanagement-MyBatisProject.iml" filepath="$PROJECT_DIR$/grademanagement-MyBatisProject/grademanagement-MyBatisProject.iml" />
diff --git a/Chapter01/Chapter01.iml b/Chapter01/Chapter01.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/Chapter01/Chapter01.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/Chapter01/src/Main.java b/Chapter01/src/Main.java
new file mode 100644
index 0000000..fe7aa2b
--- /dev/null
+++ b/Chapter01/src/Main.java
@@ -0,0 +1,15 @@
+//TIP 要<b>运行</b>代码，请按 <shortcut actionId="Run"/> 或
+// 点击装订区域中的 <icon src="AllIcons.Actions.Execute"/> 图标。
+public class Main {
+    public static void main(String[] args) {
+        //TIP 当文本光标位于高亮显示的文本处时按 <shortcut actionId="ShowIntentionActions"/>
+        // 查看 IntelliJ IDEA 建议如何修正。
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP 按 <shortcut actionId="Debug"/> 开始调试代码。我们已经设置了一个 <icon src="AllIcons.Debugger.Db_set_breakpoint"/> 断点
+            // 但您始终可以通过按 <shortcut actionId="ToggleLineBreakpoint"/> 添加更多断点。
+            System.out.println("i = " + i);
+        }
+    }
+}
\ No newline at end of file
diff --git a/out/production/grademanagement-SpringProject/com/ssm/first/TestFirst.class b/out/production/grademanagement-SpringProject/com/ssm/first/TestFirst.class
index d0b6acd..65ca4a4 100644
Binary files a/out/production/grademanagement-SpringProject/com/ssm/first/TestFirst.class and b/out/production/grademanagement-SpringProject/com/ssm/first/TestFirst.class differ