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editor-markdown

★ 36 Open GitHub ↗

springbooe使用editor.md实现Markdown编辑器

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> Markdown是一种可以使用普通文本编辑器编写的标记语言，通过简单的标记语法，它可以使普通文本内容具有一定的格式。

## 前言
[Editor.md](https://github.com/pandao/editor.md) 是一款开源的、可嵌入的 Markdown 在线编辑器（组件），基于 CodeMirror、jQuery 和 Marked 构建。本章将使用`SpringBoot`整合`Editor.md`构建Markdown编辑器。

### 下载插件

项目地址：[Editor.md](https://github.com/pandao/editor.md)

解压目录结构：
[![https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot03.png](https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot03.png "https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot03.png")](https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot03.png "https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot03.png")

### 配置Editor.md

将exapmles文件夹中的simple.html放置到项目中，并配置对应的css和js文件

#### 配置编辑器

```html
......
	<script src="${re.contextPath}/jquery.min.js"></script>
    <script src="${re.contextPath}/editor/editormd.min.js"></script>
    <link rel="stylesheet" href="${re.contextPath}/editor/css/style.css"/>
    <link rel="stylesheet" href="${re.contextPath}/editor/css/editormd.css"/>
    <link rel="shortcut icon" href="https://pandao.github.io/editor.md/favicon.ico" type="image/x-icon"/>
......

 <textarea style="display:none;" id="textContent" name="textContent">
</textarea>
        
        <textarea id="text" class="editormd-html-textarea" name="text"></textarea>
    </div>
```

#### 初始化编辑器

```javascript
var testEditor;

$(function () {
        testEditor = editormd("test-editormd", {
            width: "90%",
            height: 640,
            syncScrolling: "single",
            path: "${re.contextPath}/editor/lib/",
            imageUpload: true,
            imageFormats: ["jpg", "jpeg", "gif", "png", "bmp", "webp"],
            imageUploadURL: "/file",
            //这个配置在simple.html中并没有，但是为了能够提交表单，使用这个配置可以让构造出来的HTML代码直接在第二个隐藏的textarea域中，方便post提交表单。
            saveHTMLToTextarea: true
            // previewTheme : "dark"
        });
    });
```

这样就实现了最简单的editor.md编辑器，效果如下：

[![https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot05.png](https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot05.png "https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot05.png")](https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot05.png "https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/springboot/springboot05.png")

- 访问地址：[http://localhost:8080/](http://localhost:8080/)

### 图片上传

由于在初始化编辑器中配置的图片上传地址为`imageUploadURL: "/file",`，与之对应，我们在`/file`处理文件上传即可

```java
@RestController
@RequestMapping("/file")
@Slf4j
public class FileController {

//    @Value("")
//    String folder = System.getProperty("user.dir")+File.separator+"upload"+File.separator;
    /**
     * 在配置文件中配置的文件保存路径
     */
    @Value("${img.location}")
    private String folder;

@PostMapping
    public FileInfo upload(HttpServletRequest request, @RequestParam(value = "editormd-image-file", required = false) MultipartFile file) throws Exception {
        log.info("【FileController】 fileName={},fileOrginNmae={},fileSize={}", file.getName(), file.getOriginalFilename(), file.getSize());
        log.info(request.getContextPath());
        String fileName = file.getOriginalFilename();
        String suffix = fileName.substring(fileName.lastIndexOf(".") + 1);
        String newFileName = new Date().getTime() + "." + suffix;

File localFile = new File(folder, newFileName);
        file.transferTo(localFile);
        log.info(localFile.getAbsolutePath());
        return new FileInfo(1, "上传成功", request.getRequestURL().substring(0,request.getRequestURL().lastIndexOf("/"))+"/upload/"+newFileName);
    }

@GetMapping("/{id}")
    public void downLoad(@PathVariable String id, HttpServletRequest request, HttpServletResponse response) {
        try (InputStream inputStream = new FileInputStream(new File(folder, id + ".txt"));
             OutputStream outputStream = response.getOutputStream();) {
            response.setContentType("application/x-download");
            response.setHeader("Content-Disposition", "attachment;filename=test.txt");

IOUtils.copy(inputStream, outputStream);
            outputStream.flush();
        } catch (Exception e) {

}
    }
}

```

### 文件预览

表单POST提交时，editor.md将我们的markdown语法文档翻译成了HTML语言，并将html字符串提交给了我们的后台，后台将这些HTML字符串持久化到数据库中。具体在页面显示做法如下：

```html
<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="utf-8"/>
    <title>Editor.md examples</title>
    <link rel="stylesheet" href="${re.contextPath}/editor/css/editormd.preview.min.css" />
    <link rel="stylesheet" href="${re.contextPath}/editor/css/editormd.css"/>
</head>
<body>

<div class="content editormd-preview-theme" id="content">${editor.content!''}</div>
<script src="${re.contextPath}/jquery.min.js"></script>
<script src="${re.contextPath}/editor/lib/marked.min.js"></script>
<script src="${re.contextPath}/editor/lib/prettify.min.js"></script>
<script src="${re.contextPath}/editor/editormd.min.js"></script>
<script type="text/javascript">
    editormd.markdownToHTML("content");
</script>
</body>
</html>
```

- 预览地址：[http://localhost:8080/editorWeb/preview/{id}](http://localhost:8080/editorWeb/preview/{id})

- 编辑地址：[http://localhost:8080/editorWeb/edit/{id}](http://localhost:8080/editorWeb/edit/{id})

## 代码下载 ##
从我的 github 中下载，[https://github.com/longfeizheng/editor-markdown](https://github.com/longfeizheng/editor-markdown)

---
[![https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/wechat/xiaochengxu.png](https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/wechat/xiaochengxu.png "https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/wechat/xiaochengxu.png")](https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/wechat/xiaochengxu.png "https://raw.githubusercontent.com/longfeizheng/longfeizheng.github.io/master/images/wechat/xiaochengxu.png")

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