diff --git "a/\345\210\230\345\277\227\345\274\272/20/index.html" "b/\345\210\230\345\277\227\345\274\272/20/index.html"
new file mode 100644
index 0000000000000000000000000000000000000000..29ffcf7eaa99cc83ff1ed5740e0697ea0e1500a8
--- /dev/null
+++ "b/\345\210\230\345\277\227\345\274\272/20/index.html"
@@ -0,0 +1,206 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>axios使用</title>
+    <style>
+        .container {
+            display: flex;
+            justify-content: center;
+            /* 水平居中 */
+            align-items: center;
+            /* 垂直居中 */
+        }
+
+        .module {
+            background-color: #f0f0f0;
+            padding: 10px;
+            border: 1px solid #ccc;
+        }
+
+        .module button,
+        .module a {
+            margin: 10px;
+        }
+
+        /* 仅对第一个模块应用右边距 */
+        .module:first-child {
+            margin-right: 200px;
+        }
+
+        .module {
+            width: 500px;
+            background-color: #f0f0f0;
+            padding: 50px;
+            margin: 20px auto;
+            text-align: center;
+            border-radius: 8px;
+            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+        }
+
+        .module h1 {
+            margin-bottom: 20px;
+        }
+
+        .module form {
+            display: flex;
+            flex-direction: column;
+            align-items: center;
+        }
+
+        .module label {
+            font-weight: bold;
+            margin-top: 10px;
+        }
+
+        .module input {
+            width: 100%;
+            padding: 10px;
+            margin-top: 5px;
+            border: 1px solid #ccc;
+            border-radius: 4px;
+            box-sizing: border-box;
+        }
+
+        .module input[type="submit"] {
+            width: 100%;
+            padding: 10px;
+            background-color: #007BFF;
+            color: white;
+            border: none;
+            border-radius: 4px;
+            cursor: pointer;
+            margin-top: 20px;
+        }
+
+        .module input[type="submit"]:hover {
+            background-color: #0056b3;
+        }
+    </style>
+    <script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
+</head>
+
+<body>
+    <div class="container">
+        <div class="module">
+            <h1>查询模块</h1>
+            <div>
+                <ul>
+                    <li>加载中···</li>
+                </ul>
+            </div>
+        </div>
+        <div class="module">
+            <h1>新增模块</h1>
+            <form action="/submit_book" method="POST">
+                <label for="bookname">图书名称:</label><br>
+                <input type="text" id="bookname" name="bookname" required><br>
+
+                <label for="author">作者:</label><br>
+                <input type="text" id="author" name="author" required><br>
+
+                <label for="publisher">出版社:</label><br>
+                <input type="text" id="publisher" name="publisher" required><br>
+
+                <label for="creator">创建者:</label><br>
+                <input type="text" id="creator" name="creator" required value="cai"><br>
+
+                <input type="submit" value="提交">
+            </form>
+        </div>
+    </div>
+
+    <script>
+        // 获取标签
+        const showModule = document.querySelector('.module').firstElementChild.nextElementSibling.firstElementChild;
+        const insertModule = document.querySelectorAll('.module')[1];
+        const form = insertModule.firstElementChild.nextElementSibling;
+
+        showBook('cai')
+
+        // 查询书本
+        function showBook(creator) {
+            const config = {
+                method: 'get',
+                url: `https://hmajax.itheima.net/api/books?creator=${creator}`,
+            };
+            axios(config)
+                .then(function (response) {
+                    // 正常
+                    const books = response.data.data
+
+                    showModule.innerHTML = books.map(function (book) {
+                        return `<li>书名：${book.bookname}，作者：${book.author}，出版社：${book.publisher}<button data-id=${book.id}>删除</button><a href="./update.html?id=${book.id}&creator=${creator}">修改</a></li>`;
+                    }).join('');
+                })
+                .catch(function (error) {
+                    // 报错的
+                    console.log(error);
+                });
+        }
+
+        // 新增书本
+        function insertBook() {
+            const childrens = form.children;
+            const book = {};
+            for (let i = 0; i < childrens.length; i++) {
+                if (childrens[i].name) {
+                    book[childrens[i].name] = childrens[i].value;
+                }
+            }
+
+            // 把书对象给接口
+            const config = {
+                method: 'post',
+                url: 'https://hmajax.itheima.net/api/books',
+                headers: {
+                    'Content-Type': 'application/json'
+                },
+                data: book
+            };
+
+            axios(config)
+                .then(function (response) {
+                    showBook('cai');
+                })
+                .catch(function (error) {
+                    console.log(error);
+                });
+
+        }
+
+        // 给每个按钮一个点击事件
+        showModule.addEventListener('click', function (e) {
+            if (e.target.dataset.id) {
+                deleteBook(e.target.dataset.id);
+            }
+        })
+
+        form.addEventListener('submit', function (e) {
+            e.preventDefault();
+            insertBook();
+            this.reset();
+        })
+
+        // 删除书本
+        function deleteBook(id) {
+            var config = {
+                method: 'delete',
+                url: 'https://hmajax.itheima.net/api/books/' + id,
+                headers: {}
+            };
+
+            axios(config)
+                .then(function (response) {
+                    showBook('cai');
+                })
+                .catch(function (error) {
+                    console.log(error);
+                });
+        }
+    </script>
+</body>
+
+</html>
\ No newline at end of file
diff --git "a/\345\210\230\345\277\227\345\274\272/20/update.html" "b/\345\210\230\345\277\227\345\274\272/20/update.html"
new file mode 100644
index 0000000000000000000000000000000000000000..610ce6d63e7ecc3277ea19e58feef09ff68ed6b8
--- /dev/null
+++ "b/\345\210\230\345\277\227\345\274\272/20/update.html"
@@ -0,0 +1,170 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>修改模块</title>
+    <style>
+        .module {
+            width: 500px;
+            background-color: #f0f0f0;
+            padding: 50px;
+            margin: 20px auto;
+            text-align: center;
+            border-radius: 8px;
+            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+        }
+
+        .module h1 {
+            margin-bottom: 20px;
+        }
+
+        .module form {
+            display: flex;
+            flex-direction: column;
+            align-items: center;
+        }
+
+        .module label {
+            font-weight: bold;
+            margin-top: 10px;
+        }
+
+        .module input {
+            width: 100%;
+            padding: 10px;
+            margin-top: 5px;
+            border: 1px solid #ccc;
+            border-radius: 4px;
+            box-sizing: border-box;
+        }
+
+        .module input[type="submit"] {
+            width: 100%;
+            padding: 10px;
+            background-color: #007BFF;
+            color: white;
+            border: none;
+            border-radius: 4px;
+            cursor: pointer;
+            margin-top: 20px;
+        }
+
+        .module input[type="submit"]:hover {
+            background-color: #0056b3;
+        }
+    </style>
+    <script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
+</head>
+
+<body>
+    <div class="module">
+        <h1>修改模块</h1>
+        <form action="/submit_book" method="POST">
+            <label for="bookname">图书名称:</label><br>
+            <input type="text" id="bookname" name="bookname" required><br>
+
+            <label for="author">作者:</label><br>
+            <input type="text" id="author" name="author" required><br>
+
+            <label for="publisher">出版社:</label><br>
+            <input type="text" id="publisher" name="publisher" required><br>
+
+            <label for="creator">创建者:</label><br>
+            <input type="text" id="creator" name="creator" readonly><br>
+
+            <input type="submit" value="修改">
+        </form>
+    </div>
+
+    <script>
+        // 获取标签
+        const form = document.querySelector('.module').firstElementChild.nextElementSibling;
+        // 获取input        
+        const childrens = form.children;
+        const inputs = [];
+        for (let i = 0; i < childrens.length; i++) {
+            if (childrens[i].name) {
+                inputs.push(childrens[i]);
+            }
+        }
+        // 获取 id 和 creator
+        const url = new URLSearchParams(location.search)
+        const id = url.get('id');
+        const creator = url.get('creator');
+
+        showBook();
+
+        // 查询书本
+        function showBook() {
+            const config = {
+                method: 'get',
+                url: `https://hmajax.itheima.net/api/books?creator=${creator}`,
+            };
+            axios(config)
+                .then(function (response) {
+                    // 正常
+                    const books = response.data.data
+                    // 书本对象
+                    let book;
+
+                    for (let i = 0; i < books.length; i++) {
+                        if (books[i].id == id) {
+                            book = books[i];
+                            break;
+                        }
+                    }
+
+                    // 开始给input插入具体的值了
+                    inputs[0].value = book.bookname;
+                    inputs[1].value = book.author;
+                    inputs[2].value = book.publisher;
+                    inputs[3].value = creator;
+                })
+                .catch(function (error) {
+                    // 报错的
+                    console.log(error);
+                });
+        }
+
+
+        // 修改书本
+        function updateBook() {
+            // 书本对象
+            const book = {};
+            for (let i = 0; i < childrens.length; i++) {
+                if (childrens[i].name) {
+                    book[childrens[i].name] = childrens[i].value;
+                }
+            }
+
+            var config = {
+                method: 'put',
+                url: `https://hmajax.itheima.net/api/books/${id}`,
+                headers: {
+                    'Content-Type': 'application/json'
+                },
+                data: book
+            };
+
+            axios(config)
+                .then(function (response) {
+                    // 回到上一个页面
+                    location.href = './index.html';
+                })
+                .catch(function (error) {
+                    console.log(error);
+                });
+        }
+
+        form.addEventListener('submit', function (e) {
+            e.preventDefault();
+
+            // 用当前input里面的valu来修改
+            updateBook();
+        })
+    </script>
+</body>
+
+</html>
\ No newline at end of file
