diff --git a/src/App.vue b/src/App.vue
index d2dc268..c9d1739 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,11 +1,35 @@
+<template>
+    <div>
+        <Split v-model="split">
+            <template #left>
+                <div class="split-left" :class="hiddenSplitLeft">
+                    <LeftSidebar v-model:rootFolderPath="rootFolderPath" v-model:currentFilePath="currentFilePath">
+                    </LeftSidebar>
+                </div>
+            </template>
+            <template #trigger>
+                <div class="split-trigger"></div>
+            </template>
+            <template #right>
+                <div ref="splitRight" class="split-right">
+                    <MarkdownEditor ref="markdownRef" width="100%" height="100%" :autoInit="false"
+                        :markdownCode="markdownCode" :imageUpload="true" :imageUploadURL="imageUploadURLOfEditor"
+                        :imageUploadURLChange="changeImageUploadURL" :onload="reloadEditorHeight"
+                        :onFullScreenExit="handleWindowResize" @update:markdownCode="newCode => markdownCode = newCode"
+                        :appendToolbar="appendToolbar" />
+                </div>
+            </template>
+        </Split>
+    </div>
+</template>
+
 <script setup>
+import MarkdownEditor from './components/MarkdownEditor.vue'
+import LeftSidebar from './components/LeftSidebar.vue'
 import { ref, watch, useTemplateRef, onMounted, onUnmounted } from "vue";
 import { invoke } from "@tauri-apps/api/core";
-import { readTextFile, writeTextFile } from '@tauri-apps/plugin-fs';
+import { readTextFile, writeTextFile, exists } from '@tauri-apps/plugin-fs';
 import { Message } from 'view-ui-plus'
-import MarkdownEditor from './components/MarkdownEditor.vue'
-import SelectFolder from './components/SelectFolder.vue'
-import FolderTree from './components/FolderTree.vue'
 
 // 原始示例数据，仅供参考
 const greetMsg = ref("");
@@ -15,8 +39,44 @@ async function greet() {
     greetMsg.value = await invoke("greet", { name: name.value });
 }
 
+// 使用 Split 组件动态控制页面左右布局
+const split = ref(0.2);
+const splitRight = useTemplateRef('splitRight');
+const hiddenSplitLeft = ref("");
+watch(split, (newSplit) => {
+    // 当 split 小于某个值时，隐藏左边布局
+    if (newSplit < 0.05) {
+        split.value = 0.01
+        if (hiddenSplitLeft.value == "") {
+            hiddenSplitLeft.value = "hidden"
+        }
+    } else {
+        if (hiddenSplitLeft.value == "hidden") {
+            hiddenSplitLeft.value = ""
+        }
+    }
+
+    // 动态调整 MarkdownEditor 的宽度。如果不执行 reset 的话，CodeMirror 内部编辑器不会自适应宽度
+    reloadEditorWidth()
+})
+
+// 监听根目录路径。如果之前已经选过目录，初始界面直接加载该目录
+const rootFolderPath = ref(localStorage.getItem('rootPathOfFolderTree') || "");
+watch(rootFolderPath, (newRootPath) => {
+    localStorage.setItem('rootPathOfFolderTree', newRootPath);
+})
+
+// <FolderTree> 完成文件树渲染后，点击文件得到 currentFilePath
+const currentFilePath = ref(localStorage.getItem('currentSelectedFilePath') || "");
+// 读取 currentFilePath 的文件内容，填充到 MarkdownEditor 之中
+watch(currentFilePath, async (newFilePath) => {
+    localStorage.setItem('currentSelectedFilePath', newFilePath);
+    await readFileContent(newFilePath);
+})
+
+// 加载 Markdown 编辑器
 const markdownRef = ref(null);
-const markdownCode = ref("# Hello Markdown")
+const markdownCode = ref("# Hello Markdown");
 const appendToolbar = [
     {
         name: "|",
@@ -45,15 +105,16 @@ const appendToolbar = [
     },
 ];
 // 支持从 localStorage 读写 imageUploadURL
-const imageUploadURLOfEditor = ref(localStorage.getItem('imageUploadURLOfEditor') || "")
+const imageUploadURLOfEditor = ref(localStorage.getItem('imageUploadURLOfEditor') || "");
 function changeImageUploadURL(newImageUploadURL) {
-    console.log("new imageUploadURL: ", newImageUploadURL)
-    localStorage.setItem('imageUploadURLOfEditor', newImageUploadURL)
+    console.log("new imageUploadURL: ", newImageUploadURL);
+    localStorage.setItem('imageUploadURLOfEditor', newImageUploadURL);
 }
 async function initMarkdownEditor() {
+    // 打开上一次选择的文件的内容
     if (currentFilePath.value.length > 0) {
         try {
-            markdownCode.value = await readTextFile(currentFilePath.value)
+            markdownCode.value = await readTextFile(currentFilePath.value);
             Message.success('已读取文件内容，并加载到编辑器中:' + currentFilePath.value);
         } catch (err) {
             Message.error('文件读取失败:' + err);
@@ -63,76 +124,24 @@ async function initMarkdownEditor() {
 }
 // 矫正 markdown 编辑器的高度
 function reloadEditorHeight() {
-    markdownRef.value.resetHeight(window.innerHeight)
+    markdownRef.value.resetHeight(window.innerHeight);
 }
 // 矫正 markdown 编辑器的宽度
 function reloadEditorWidth() {
     // 可以使用 splitRight.value.offsetWidth 也可以使用 100% 来调整
-    const width = splitRight.value.offsetWidth
-    markdownRef.value.resetWidth("100%")
+    const width = splitRight.value.offsetWidth;
+    markdownRef.value.resetWidth("100%");
 }
 // 监听页面宽度和高度，调整 markdown 编辑器的高宽度
 const handleWindowResize = () => {
-    reloadEditorHeight()
-    reloadEditorWidth()
+    reloadEditorHeight();
+    reloadEditorWidth();
 }
 
-// 动态控制页面左右布局
-const split = ref(0.2)
-const hiddenSplitRight = ref("")
-const splitRight = useTemplateRef('splitRight')
-watch(split, (newSplit, oldSplit) => {
-    // 当 split 小于某个值时，隐藏左边布局
-    if (newSplit < 0.05) {
-        split.value = 0.01
-        if (hiddenSplitRight.value == "") {
-            hiddenSplitRight.value = "hidden"
-        }
-    } else {
-        if (hiddenSplitRight.value == "hidden") {
-            hiddenSplitRight.value = ""
-        }
-    }
-
-    // 动态调整 MarkdownEditor 的宽度。如果不执行 reset 的话，CodeMirror 内部编辑器不会自适应宽度
-    reloadEditorWidth()
-})
-
-// 如果之前已经选过目录，那么直接加载该目录
-const rootPathOfFolderTree = ref(localStorage.getItem('rootPathOfFolderTree') || "")
-function changeRootPath(newRootPath) {
-    localStorage.setItem('rootPathOfFolderTree', newRootPath)
-    rootPathOfFolderTree.value = newRootPath
-}
-// <SelectFolder> 返回的文件树数据，增加自定义数据，便于传给 <FolderTree> 进行渲染
-function appendDataForNode(nodeData) {
-    if (!nodeData.directory) {
-        // 给文件节点，增加 suffix 字段，用于表示文件后缀，便于 <FolderTree> 过滤文件
-        let splitResult = nodeData.name.split('.');
-        let fileSuffix = splitResult.length > 1 ? splitResult.pop() : '';
-        nodeData.suffix = fileSuffix;
-    }
-}
-
-// <SelectFolder> 选择目录后赋值给 folderTreeData，然后再传递给 <FolderTree>
-const folderTreeData = ref(null)
-function showFileTree(treeData) {
-    folderTreeData.value = treeData
-}
-
-// <FolderTree> 完成文件树渲染后，点击文件得到 currentFilePath
-// 读取 currentFilePath 的文件内容，填充到 MarkdownEditor 之中
-const currentFilePath = ref(localStorage.getItem('currentSelectedFilePath') || "");
-async function fileSelected(fileNodeData) {
-    console.log(fileNodeData)
-    const filePath = fileNodeData.path
-    localStorage.setItem('currentSelectedFilePath', filePath)
-    await readFileContent(filePath)
-}
 async function readFileContent(filePath) {
     try {
-        markdownRef.value.setMarkdownCode(await readTextFile(filePath))
-        currentFilePath.value = filePath
+        markdownRef.value.setMarkdownCode(await readTextFile(filePath));
+        currentFilePath.value = filePath;
         Message.success('已读取文件内容，并加载到编辑器中:' + filePath);
     } catch (err) {
         Message.error('文件读取失败:' + err);
@@ -145,6 +154,10 @@ async function writeFileContent() {
         return;
     }
     try {
+        const exist = await exists(currentFilePath.value);
+        if (!exist) {
+            throw new Error(currentFilePath.value + " 文件不存在.");
+        }
         await writeTextFile(currentFilePath.value, markdownRef.value.getMarkdownCode())
         Message.success('文件更新成功:' + currentFilePath.value);
     } catch (err) {
@@ -161,34 +174,6 @@ onUnmounted(() => {
 })
 </script>
 
-<template>
-    <div>
-        <Split v-model="split">
-            <template #left>
-                <div class="split-left">
-                    <SelectFolder :class="hiddenSplitRight" :rootPath="rootPathOfFolderTree"
-                        :nodeDataCallback="appendDataForNode" @update:rootPath="changeRootPath"
-                        @folder-selected="showFileTree" />
-                    <FolderTree :class="hiddenSplitRight" :treeData="folderTreeData" :expandLevel="1"
-                        :selectedNode="[currentFilePath]" :specifyFileSuffix="['md']" @file-selected="fileSelected" />
-                </div>
-            </template>
-            <template #trigger>
-                <div class="split-trigger"></div>
-            </template>
-            <template #right>
-                <div ref="splitRight" class="split-right">
-                    <MarkdownEditor ref="markdownRef" width="100%" height="100%" :autoInit="false"
-                        :markdownCode="markdownCode" :imageUpload="true" :imageUploadURL="imageUploadURLOfEditor"
-                        :imageUploadURLChange="changeImageUploadURL" :onload="reloadEditorHeight"
-                        :onFullScreenExit="handleWindowResize" @update:markdownCode="newCode => markdownCode = newCode"
-                        :appendToolbar="appendToolbar" />
-                </div>
-            </template>
-        </Split>
-    </div>
-</template>
-
 <style scoped>
 body {
     overflow: hidden;
diff --git a/src/components/LeftSidebar.vue b/src/components/LeftSidebar.vue
new file mode 100644
index 0000000..272fcb0
--- /dev/null
+++ b/src/components/LeftSidebar.vue
@@ -0,0 +1,281 @@
+<template>
+    <SelectFolder :rootPath="rootFolderPath" :nodeDataCallback="appendDataForNode" @update:rootPath="changeRootPath"
+        @folder-selected="showFileTree" />
+    <FolderTree ref="folderTreeRef" :treeData="folderTreeData" :expandLevel="1" :selectedNode="[currentFilePath]"
+        :specifyFileSuffix="['md']" @file-selected="fileSelected" />
+</template>
+
+<script setup>
+import SelectFolder from './SelectFolder.vue';
+import FolderTree from './FolderTree.vue';
+import { ref } from 'vue';
+import { mkdir, remove, create, exists, rename } from '@tauri-apps/plugin-fs';
+import { Message } from 'view-ui-plus'
+
+defineProps({
+    currentFilePath: {
+        type: String,
+        required: false,
+        default: ''
+    },
+    rootFolderPath: {
+        type: String,
+        required: false,
+        default: ''
+    },
+});
+
+const emit = defineEmits([
+    'update:currentFilePath',
+    'update:rootFolderPath'
+]);
+
+const folderTreeRef = ref(null)
+// <SelectFolder> 返回的文件树数据，增加自定义数据，便于传给 <FolderTree> 进行渲染
+function appendDataForNode(nodeData) {
+    if (nodeData.directory) {
+        // 当前节点为文件夹，增加“新建目录”“新建文件”等右键菜单
+        nodeData.contextMenuData = [
+            {
+                name: "新建目录",
+                handler: (nodeRenderData) => {
+                    // 新建子节点时自动展开当前文件夹
+                    nodeRenderData.expand = true;
+                    // 定义子节点为 input 输入框
+                    let subNodeData = {
+                        input: true,
+                        completer: async (data, newName) => {
+                            newName = newName.trim();
+                            // 如果输入名称为空，则取消当前节点
+                            if (newName.length == 0) {
+                                folderTreeRef.value.removeTreeNode(data);
+                                return;
+                            }
+                            // 文件名不能包含 / 符号
+                            if (newName.indexOf('/') >= 0) {
+                                Message.error('不能包含 / 符号');
+                                folderTreeRef.value.removeTreeNode(data);
+                                return;
+                            }
+                            let createSubNodeOfParent = false;
+                            // 输入名称不为空，尝试在该目录下新建子节点
+                            try {
+                                const newPath = nodeData.path + '/' + newName;
+                                data.sourceData.path = newPath;
+                                data.sourceData.name = newName;
+                                // 给新增的子节点也执行 appendDataForNode 操作
+                                appendDataForNode(data.sourceData);
+                                // 重新渲染当前节点
+                                if (folderTreeRef.value.reRenderTreeNode(data) === false) {
+                                    throw new Error("变更文件树失败");
+                                }
+                                createSubNodeOfParent = true;
+                                // 最后再尝试操作系统创建目录
+                                await mkdir(newPath);
+                                Message.success('创建目录成功: ' + newPath);
+                            } catch (err) {
+                                Message.error('创建目录失败: ' + err);
+                                // 如果最后操作系统接口失败，需要回滚文件树新增的节点
+                                if (createSubNodeOfParent) {
+                                    folderTreeRef.value.removeTreeNode(data);
+                                }
+                            }
+                        },
+                        path: "", // 留空，在 completer 中填充
+                        name: "", // 留空，在 completer 中填充
+                        directory: true, // 当前新建的是目录，所以为 true
+                    };
+                    // 将子节点挂载到文件树上，在当前目录之下
+                    folderTreeRef.value.appendTreeNode(nodeRenderData, subNodeData);
+                }
+            },
+            {
+                name: "新建文件",
+                handler: (nodeRenderData) => {
+                    // 新建子节点时自动展开当前文件夹
+                    nodeRenderData.expand = true;
+                    // 定义子节点为 input 输入框
+                    let subNodeData = {
+                        input: true,
+                        completer: async (data, newName) => {
+                            newName = newName.trim();
+                            // 如果输入名称为空，则取消当前节点
+                            if (newName.length == 0) {
+                                folderTreeRef.value.removeTreeNode(data);
+                                return;
+                            }
+                            // 文件名不能包含 / 符号
+                            if (newName.indexOf('/') >= 0) {
+                                Message.error('不能包含 / 符号');
+                                folderTreeRef.value.removeTreeNode(data);
+                                return;
+                            }
+                            // 如果文件不以 .md 为后缀，同样取消当前输入框
+                            if (!newName.endsWith('.md')) {
+                                Message.error('只允许 .md 文件');
+                                folderTreeRef.value.removeTreeNode(data);
+                                return;
+                            }
+                            let createSubNodeOfParent = false;
+                            // 输入名称不为空，尝试在该目录下新建子节点
+                            try {
+                                const newPath = nodeData.path + '/' + newName;
+                                // 检查新的路径是否已存在，避免覆盖其他文件
+                                const exist = await exists(newPath);
+                                if (exist) {
+                                    // 恢复当前节点并报错
+                                    folderTreeRef.value.removeTreeNode(data);
+                                    throw new Error("存在同名文件.");
+                                }
+                                data.sourceData.path = newPath;
+                                data.sourceData.name = newName;
+                                // 给新增的子节点也执行 appendDataForNode 操作
+                                appendDataForNode(data.sourceData);
+                                // 重新渲染当前节点
+                                if (folderTreeRef.value.reRenderTreeNode(data) === false) {
+                                    throw new Error("变更文件树失败");
+                                }
+                                createSubNodeOfParent = true;
+                                // 最后再尝试操作系统创建目录
+                                await create(newPath);
+                                Message.success('创建文件成功: ' + newPath);
+                            } catch (err) {
+                                Message.error('创建文件失败: ' + err);
+                                // 如果最后操作系统接口失败，需要回滚文件树新增的节点
+                                if (createSubNodeOfParent) {
+                                    folderTreeRef.value.removeTreeNode(data);
+                                }
+                            }
+                        },
+                        path: "", // 留空，在 completer 中填充
+                        name: "", // 留空，在 completer 中填充
+                        directory: false, // 当前新建的是文件，所以为 false
+                    };
+                    // 将子节点挂载到文件树上，在当前目录之下
+                    folderTreeRef.value.appendTreeNode(nodeRenderData, subNodeData);
+                }
+            },
+            {
+                name: "删除",
+                handler: async (nodeRenderData) => {
+                    try {
+                        if (folderTreeRef.value.removeTreeNode(nodeRenderData) === false) {
+                            throw new Error("变更文件树失败");
+                        }
+                        await remove(nodeRenderData.path, { recursive: true });
+                        Message.success('删除目录成功: ' + nodeRenderData.path);
+                    } catch (err) {
+                        Message.error('删除目录失败: ' + err);
+                    }
+                }
+            }
+        ];
+    } else {
+        // 给文件节点，增加 suffix 字段，用于表示文件后缀，便于 <FolderTree> 过滤文件
+        let splitResult = nodeData.name.split('.');
+        let fileSuffix = splitResult.length > 1 ? splitResult.pop() : '';
+        nodeData.suffix = fileSuffix;
+        // 当前节点为文件，增加“重命名”“删除”等右键菜单
+        nodeData.contextMenuData = [
+            {
+                name: "重命名",
+                handler: (nodeRenderData) => {
+                    // 将该节点转为 input 输入框
+                    nodeRenderData.sourceData.input = true;
+                    nodeRenderData.sourceData.completer = async (data, newName) => {
+                        newName = newName.trim();
+                        // 如果输入名称为空，不做任何变动，恢复当前节点
+                        if (newName.length == 0) {
+                            folderTreeRef.value.reRenderTreeNode(data);
+                            return;
+                        }
+                        // 文件名不能包含 / 符号
+                        if (newName.indexOf('/') >= 0) {
+                            Message.error('不能包含 / 符号');
+                            folderTreeRef.value.reRenderTreeNode(data);
+                            return;
+                        }
+                        // 如果文件不以 .md 为后缀，同样恢复当前节点
+                        if (!newName.endsWith('.md')) {
+                            Message.error('只允许 .md 文件');
+                            folderTreeRef.value.reRenderTreeNode(data);
+                            return;
+                        }
+                        // 尝试重命名该节点
+                        let newRenderNode = null;
+                        let oldName = '';
+                        let oldPath = nodeData.path;
+                        let splitPathResult = oldPath.split('/');
+                        try {
+                            if (splitPathResult.length <= 1) {
+                                // 恢复当前节点并报错
+                                folderTreeRef.value.reRenderTreeNode(data);
+                                throw new Error("该节点文件路径非法.");
+                            }
+                            oldName = splitPathResult.pop();
+                            let newPath = splitPathResult.join('/') + '/' + newName;
+                            // 检查新的路径是否已存在，避免覆盖其他文件
+                            const exist = await exists(newPath);
+                            if (exist) {
+                                // 恢复当前节点并报错
+                                folderTreeRef.value.reRenderTreeNode(data);
+                                throw new Error("存在同名文件.");
+                            }
+                            data.sourceData.path = newPath;
+                            data.sourceData.name = newName;
+                            // 新的节点数据需要执行 appendDataForNode 操作
+                            appendDataForNode(data.sourceData);
+                            // 重新渲染当前节点
+                            newRenderNode = folderTreeRef.value.reRenderTreeNode(data);
+                            if (newRenderNode === false) {
+                                throw new Error("变更文件树失败");
+                            }
+                            // 最后再尝试操作系统重命名
+                            await rename(oldPath, newPath);
+                            Message.success('重命名成功: ' + newPath);
+                        } catch (err) {
+                            Message.error('重命名失败: ' + err);
+                            // 如果最后操作系统接口失败，需要回滚文件树新增的节点
+                            if (newRenderNode !== null && newRenderNode !== false) {
+                                newRenderNode.sourceData.path = oldPath;
+                                newRenderNode.sourceData.name = oldName;
+                                folderTreeRef.value.reRenderTreeNode(newRenderNode);
+                            }
+                        }
+                    };
+                    // 将当前节点重新渲染为输入框
+                    folderTreeRef.value.reRenderTreeNode(nodeRenderData);
+                }
+            },
+            {
+                name: "删除",
+                handler: async (nodeRenderData) => {
+                    try {
+                        if (folderTreeRef.value.removeTreeNode(nodeRenderData) === false) {
+                            throw new Error("变更文件树失败");
+                        }
+                        await remove(nodeRenderData.path, { recursive: true });
+                        Message.success('删除文件成功: ' + nodeRenderData.path);
+                    } catch (err) {
+                        Message.error('删除文件失败: ' + err);
+                    }
+                }
+            },
+        ];
+    }
+}
+
+// <SelectFolder> 选择目录后赋值给 folderTreeData，然后再传递给 <FolderTree>
+const folderTreeData = ref(null)
+function showFileTree(treeData) {
+    folderTreeData.value = treeData
+}
+
+const changeRootPath = (newRootPath) => {
+    emit('update:rootFolderPath', newRootPath); // 触发双向绑定更新
+}
+
+const fileSelected = (fileRenderData) => {
+    emit('update:currentFilePath', fileRenderData.path); // 触发双向绑定更新
+}
+</script>
\ No newline at end of file