diff --git "a/47 \346\250\212\345\260\217\351\203\255/20221125 java\344\270\255\345\233\276\344\271\246\347\256\241\347\220\206\347\263\273\347\273\237.md" "b/47 \346\250\212\345\260\217\351\203\255/20221125 java\344\270\255\345\233\276\344\271\246\347\256\241\347\220\206\347\263\273\347\273\237.md"
new file mode 100644
index 0000000000000000000000000000000000000000..c64196305f0f901615a3d77028af89d5aac504ad
--- /dev/null
+++ "b/47 \346\250\212\345\260\217\351\203\255/20221125 java\344\270\255\345\233\276\344\271\246\347\256\241\347\220\206\347\263\273\347\273\237.md"	
@@ -0,0 +1,150 @@
+# 图书管理系统
+
+```java
+public class zy20 {
+    public static void main(String[] args) {
+        String[] n = new String[10];
+        while (true) {
+            zxc();
+            int num = js();
+            df(num, n);
+            if (num == 6) {
+                break;
+            }
+        }
+    }
+
+    private static void zxc() {
+        System.out.println("" +
+                "\n==============================\n" +
+                "-     使用图书管理系统   -\n" +
+                "- \t\t1.浏览所有书本信息\t\t-\n" +
+                "- \t\t2.添加书本信息\t\t-\n" +
+                "- \t\t3.修改书本信息\t\t-\n" +
+                "- \t\t4.删除书本信息\t\t-\n" +
+                "- \t\t5.查询书本信息\t\t-\n" +
+                "- \t\t6.退出管理系统\t\t-\n" +
+                "==============================");
+    }
+
+    private static void df(int num, String[] n) {
+        switch (num) {
+            case 1:
+                xs(n);
+                break;
+            case 2:
+                tj(n);
+                break;
+            case 3:
+                xg(n);
+                break;
+            case 4:
+                int a = ty(n);
+                if (a != -1) {
+                    sc(a, n);
+                }
+                break;
+            case 5:
+                int b = ty(n);
+                if (b != -1) {
+                    cx(b, n);
+                }
+                break;
+            case 6:
+                break;
+        }
+    }
+
+    private static void cx(int b, String[] n) {
+        System.out.println("书籍在第" + (b + 1) + "个地方");
+    }
+
+    private static void sc(int a, String[] n) {
+        n[a] = null;
+        System.out.println("删除成功");
+    }
+
+    private static int ty(String[] n) {
+        System.out.println("输入书本名称");
+        Scanner n1 = new Scanner(System.in);
+        String mc = n1.next();
+        int cf = -1;
+        int aa = 0;
+        for (int i = 0; i < n.length; i++) {
+            if (mc.equals(n[i])) {
+                cf = i;
+                break;
+            } else {
+                aa++;
+                if (n.length == aa) {
+                    System.out.println("未查询到该书本");
+                    break;
+                }
+            }
+        }
+        return cf;
+    }
+
+    private static void xg(String[] n) {
+        System.out.println("输入需要修改的书本");
+        Scanner n1 = new Scanner(System.in);
+        String mc = n1.next();
+        int aa = 0;
+        for (int i = 0; i < n.length; i++) {
+            if (mc.equals(n[i])) {
+                System.out.println("输入修改后的名称");
+                Scanner a = new Scanner(System.in);
+                n[i] = a.next();
+                System.out.println("修改成功！");
+                break;
+            } else {
+                aa++;
+                if (n.length == aa) {
+                    System.out.println("未找到该书本");
+                    break;
+                }
+            }
+        }
+    }
+
+    private static void tj(String[] n) {
+        System.out.println("输入添加的书本名称");
+        Scanner n1 = new Scanner(System.in);
+        String mc = n1.next();
+        for (int j = 0; j < n.length; j++) {
+            if (mc.equals(n[j])) {
+                System.out.println("已存在该" + mc + "书本");
+                break;
+            } else {
+                if (null == n[j]) {
+                    n[j] = mc;
+                    System.out.println("添加图书成功！");
+                    break;
+                }
+            }
+        }
+    }
+
+    private static void xs(String[] n) {
+        int a = 0;
+        for (int i = 0; i < n.length; i++) {
+            if (null == n[i]) {
+                a++;
+                if (n.length == a) {
+                    System.out.println("未添加任何书籍");
+                }
+                continue;
+            } else {
+                System.out.print(n[i] + " ");
+            }
+        }
+    }
+
+    private static int js() {
+        System.out.println("请选择您的操作：");
+        Scanner sc = new Scanner(System.in);
+        int num = sc.nextInt();
+        return num;
+    }
+}
+```
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