diff --git a/src/main/java/com/never/BitOperation.java b/src/main/java/com/never/basic/BitOperation.java
similarity index 95%
rename from src/main/java/com/never/BitOperation.java
rename to src/main/java/com/never/basic/BitOperation.java
index 05f6b50..266620b 100644
--- a/src/main/java/com/never/BitOperation.java
+++ b/src/main/java/com/never/basic/BitOperation.java
@@ -1,4 +1,4 @@
-package com.never;
+package com.never.basic;
 
 public class BitOperation {
     public static void main(String[] args) {
diff --git a/src/main/java/com/never/basic/BubbleSort.java b/src/main/java/com/never/basic/BubbleSort.java
new file mode 100644
index 0000000..0178c4f
--- /dev/null
+++ b/src/main/java/com/never/basic/BubbleSort.java
@@ -0,0 +1,21 @@
+package com.never.basic;
+
+/**
+ * @Description: 冒泡排序
+ * @author: Bo Li
+ * @date: 2022年08月24日 10:19
+ */
+public class BubbleSort {
+    public void bubbleSort(int[] arr){
+        if(arr == null || arr.length <2){
+            return;
+        }
+        for(int i = 0 ; i<arr.length ; i++){
+            for(int j = arr.length-1 ;j > i;j--){
+                if(arr[j]<arr[j-1]){
+                    CommonUtil.swapIndex(arr,j,j-1);
+                }
+            }
+        }
+    }
+}
diff --git a/src/main/java/com/never/basic/CommonUtil.java b/src/main/java/com/never/basic/CommonUtil.java
new file mode 100644
index 0000000..da1b724
--- /dev/null
+++ b/src/main/java/com/never/basic/CommonUtil.java
@@ -0,0 +1,14 @@
+package com.never.basic;
+
+/**
+ * @Description: 工具类
+ * @author: Bo Li
+ * @date: 2022年08月24日 10:14
+ */
+public class CommonUtil {
+    public  static void swapIndex(int[] arr , int i, int j){
+        int tmp = arr[i];
+        arr[i] = arr[j];
+        arr[j] = tmp;
+    }
+}
diff --git a/src/main/java/com/never/basic/NRecursion.java b/src/main/java/com/never/basic/NRecursion.java
new file mode 100644
index 0000000..a6e9177
--- /dev/null
+++ b/src/main/java/com/never/basic/NRecursion.java
@@ -0,0 +1,22 @@
+package com.never.basic;
+
+/**
+ * @Description: 递归实现N阶乘相加
+ * @author: Bo Li
+ * @date: 2022年08月24日 10:32
+ */
+public class NRecursion {
+    public static void main(String[] args) {
+        int num = nRecursion(3);
+        System.out.println(num);
+    }
+    private static int nRecursion(int n ){
+        int sum = 0;
+        int step = 1;
+        for(int i = 1 ;i <= n; i++){
+            step *= i;
+            sum += step;
+        }
+        return sum;
+    }
+}
diff --git a/src/main/java/com/never/basic/SelectSort.java b/src/main/java/com/never/basic/SelectSort.java
new file mode 100644
index 0000000..2ad1291
--- /dev/null
+++ b/src/main/java/com/never/basic/SelectSort.java
@@ -0,0 +1,22 @@
+package com.never.basic;
+
+/**
+ * @Description: 选择排序
+ * @author: Bo Li
+ * @date: 2022年08月24日 10:13
+ */
+public class SelectSort {
+    public void selectSort(int[] arr){
+        if(arr == null || arr.length<2){
+            return;
+        }
+        for(int i = 0;i < arr.length; i++){
+            int minIndex = i;
+            for(int j = i+1; j<arr.length ; j++){
+                minIndex = arr[j]<arr[minIndex]?j:minIndex;
+            }
+            CommonUtil.swapIndex(arr,minIndex,i);
+        }
+
+    }
+}
diff --git a/src/main/java/com/never/basic/SortDemo.java b/src/main/java/com/never/basic/SortDemo.java
new file mode 100644
index 0000000..180f413
--- /dev/null
+++ b/src/main/java/com/never/basic/SortDemo.java
@@ -0,0 +1,23 @@
+package com.never.basic;
+
+/**
+ * @Description: 排序验证入口
+ * @author: Bo Li
+ * @date: 2022年08月24日 10:01
+ */
+public class SortDemo {
+    public static void main(String[] args) {
+        int[]  arr = {11,2,5,3,6,13,7};
+        printArr(arr);
+      //  new SelectSort().selectSort(arr);
+        new BubbleSort().bubbleSort(arr);
+        printArr(arr);
+    }
+
+    private static void printArr(int[] arr){
+        for(int i = 0; i<arr.length;i++){
+            System.out.print(arr[i]+" ");
+        }
+        System.out.println();
+    }
+}
diff --git a/target/classes/com/never/BitOperation.class b/target/classes/com/never/BitOperation.class
deleted file mode 100644
index 5b406ad..0000000
Binary files a/target/classes/com/never/BitOperation.class and /dev/null differ
diff --git a/target/classes/com/never/basic/BitOperation.class b/target/classes/com/never/basic/BitOperation.class
new file mode 100644
index 0000000..aa9918e
Binary files /dev/null and b/target/classes/com/never/basic/BitOperation.class differ
diff --git a/target/classes/com/never/basic/BubbleSort.class b/target/classes/com/never/basic/BubbleSort.class
new file mode 100644
index 0000000..525466f
Binary files /dev/null and b/target/classes/com/never/basic/BubbleSort.class differ
diff --git a/target/classes/com/never/basic/CommonUtil.class b/target/classes/com/never/basic/CommonUtil.class
new file mode 100644
index 0000000..d4e83c4
Binary files /dev/null and b/target/classes/com/never/basic/CommonUtil.class differ
diff --git a/target/classes/com/never/basic/NRecursion.class b/target/classes/com/never/basic/NRecursion.class
new file mode 100644
index 0000000..87e14bd
Binary files /dev/null and b/target/classes/com/never/basic/NRecursion.class differ
diff --git a/target/classes/com/never/basic/SelectSort.class b/target/classes/com/never/basic/SelectSort.class
new file mode 100644
index 0000000..b14b340
Binary files /dev/null and b/target/classes/com/never/basic/SelectSort.class differ
diff --git a/target/classes/com/never/basic/SortDemo.class b/target/classes/com/never/basic/SortDemo.class
new file mode 100644
index 0000000..e0fc4a1
Binary files /dev/null and b/target/classes/com/never/basic/SortDemo.class differ