spring 整合editor.md 实现markdown 编辑

女爷i 2022-05-28 02:38 209阅读 0赞

整合一个编辑器，其实很简单。首先找到他的源码，以editor.md 为例：[https://github.com/pandao/editor.md][https_github.com_pandao_editor.md]  
下载后，到examples文件夹看看，看到一个simple.html的例子，这就是可以复制的前端代码：

![这里写图片描述][70]

到myeclipse中新建一个应用, 并添加spring支持（公司用jdk1.7，就简单用spring4.2.5, 不用spring boot，理解整合原理就行）

![这里写图片描述][70 1]

着重看下前端的页面：

*  index.jsp，css和js自己拷贝并改下路径

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
    
    <!DOCTYPE html>
    <html lang="zh">
        <head>
            <meta charset="utf-8" />
            <title>Simple example - Editor.md examples</title>
            <link rel="stylesheet" href="css/style.css" />
            <link rel="stylesheet" href="css/editormd.css" />
            <link rel="shortcut icon" href="https://pandao.github.io/editor.md/favicon.ico" type="image/x-icon" />
            <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">    
        </head>
        <body>
            <div id="layout">
                <header>
                    <h1>Simple example</h1>
                </header>
                <form action="markdownTest" method="post">
                <div id="test-editormd">
                    <textarea style="display:none;" name="markdownContent"></textarea>
                </div>
                <button type="submit" class="btn btn-info col-md-offset-3 col-md-6">添加</button>
                    </form>
            </div>
            <script src="js/jquery.min.js"></script>
            <script src="js/editormd.min.js"></script>
            <script src="lib/marked.min.js"></script>
            <script src="lib/prettify.min.js"></script>
    
            <script src="lib/raphael.min.js"></script>
            <script src="lib/underscore.min.js"></script>
            <script src="lib/sequence-diagram.min.js"></script>
            <script src="lib/flowchart.min.js"></script>
            <script src="lib/jquery.flowchart.min.js"></script>
    
            <script src="js/editormd.js"></script>
            <script type="text/javascript"> var testEditor; $(function() { testEditor = editormd("test-editormd", { width : "90%", height : 640, syncScrolling : "single", path : "lib/", imageUpload : true, imageFormats : ["jpg", "jpeg", "gif", "png", "bmp", "webp"], imageUploadURL : "imageUpload", }); /* // or testEditor = editormd({ id : "test-editormd", width : "90%", height : 640, path : "../lib/" }); */ }); </script>
        </body>
    </html>

注意一下，如开启图片上传，要设置：

imageUpload : true,
     imageFormats : ["jpg", "jpeg", "gif", "png", "bmp", "webp"],
     imageUploadURL : "imageUpload",

其中imageUpload是我的后台处理图片上传的方法，那么我是怎么知道图片上传的请求参数和返回参数的呢？看examples的demo就知道了，首先是返回参数，可以在image-upload.html直接看：

![这里写图片描述][70 2]

至于请求参数，审查一下元素即可，叫editormd-image-file：

![这里写图片描述][70 3]

*  那么我的后台处理图片上传的方法可以这么写：

package com.wen.controller;
    
    import java.io.PrintWriter;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.json.JSONObject;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.multipart.MultipartFile;
    
    import com.wen.util.FileUpload;
    
    
    @Controller
    public class MarkDownImageUpload {
    
        @RequestMapping("imageUpload")
        public void imageUpload(@RequestParam(value = "editormd-image-file", required = true) MultipartFile file,
                HttpServletRequest request, HttpServletResponse response){
            response.setCharacterEncoding("UTF-8");
            response.setContentType("text/html;charset=UTF-8"); 
            PrintWriter wirte = null; 
            JSONObject json = new JSONObject();
             try {  
                    wirte = response.getWriter();
                    //文件存放的路径
                    String path = request.getSession().getServletContext().getRealPath("upload");
                    String url = "http://localhost:8080" 
                            + request.getContextPath() 
                            + "//upload//"
                            + FileUpload.upload(request, file, path); 
                    json.put("success", 1);
                    json.put("message", "hello");
                    json.put("url", url);
                } catch (Exception e) {  
                }finally{  
                    wirte.print(json); 
                    wirte.flush(); 
                    wirte.close(); 
                }
        }
    
    }

package com.wen.util;
    
    import java.io.File;
    import java.util.UUID;
    
    import javax.servlet.http.HttpServletRequest;
    
    import org.springframework.web.multipart.MultipartFile;
    
    public class FileUpload {
    
        /* *图片上传工具类 */
        public static String upload(HttpServletRequest request, MultipartFile file, String path) {
            String fileName = file.getOriginalFilename();
            fileName=UUID.randomUUID()+fileName.substring(fileName.indexOf("."),fileName.length());
            File targetFile = new File(path, fileName); 
            if(!targetFile.exists()){  
                targetFile.mkdirs(); 
            }  
            //保存  
            try {  
                file.transferTo(targetFile); 
            } catch (Exception e) {  
                e.printStackTrace(); 
            } 
            return fileName;
        }
    
    }

**这样图片上传就没问题了，但是，在正式场合，建议将图片放到第三方的存储平台，不要放在tomcat中，不方便。**

*  显示markdown，还是用example的例子:html-preview-markdown-to-html.html
    
    WEB-INF/index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
    
    
    <!DOCTYPE html>
    <html lang="zh">
        <head>
            <meta charset="utf-8" />
            <title>HTML Preview(markdown to html) - Editor.md examples</title>
            <link rel="stylesheet" href="css/style.css" />
            <link rel="stylesheet" href="css/editormd.css" />
            <link rel="shortcut icon" href="https://pandao.github.io/editor.md/favicon.ico" type="image/x-icon" />
            <style> .editormd-html-preview { width: 90%; margin: 0 auto; } </style>
        </head>
        <body>
            <div id="layout">
                <div id="test-editormd-view">
                    <textarea id="append-test" style="display:none;">${markdownContent}</textarea>          
                </div>
            </div>
            
            <script src="js/jquery.min.js"></script>
            <script src="js/editormd.min.js"></script>
            <script src="lib/marked.min.js"></script>
            <script src="lib/prettify.min.js"></script>
    
            <script src="lib/raphael.min.js"></script>
            <script src="lib/underscore.min.js"></script>
            <script src="lib/sequence-diagram.min.js"></script>
            <script src="lib/flowchart.min.js"></script>
            <script src="lib/jquery.flowchart.min.js"></script>
            <script src="js/editormd.js"></script>
            <script type="text/javascript"> $(function() { var testEditormdView testEditormdView = editormd.markdownToHTML("test-editormd-view", { htmlDecode : "style,script,iframe", // you can filter tags decode emoji : true, taskList : true, tex : true, // 默认不解析 flowChart : true, // 默认不解析 sequenceDiagram : true, // 默认不解析 }); }); </script>
        </body>
    </html>

*  效果：

![这里写图片描述][70 4]

![这里写图片描述][70 5]

# **源码地址：[https://github.com/awhen/MarkDownDemo][https_github.com_awhen_MarkDownDemo]** #

[https_github.com_pandao_editor.md]: https://github.com/pandao/editor.md
[70]: /images/20220528/802efafca5f64275b334d0d37043cdc7.png
[70 1]: /images/20220528/c7c1c4f35e07443491dd8a5a61c8efbd.png
[70 2]: /images/20220528/f9176486d89f4063bffebb97e3a83f3e.png
[70 3]: /images/20220528/69281bff1ae9428881c5f8e30b98e64d.png
[70 4]: /images/20220528/e790144315cd48c6a9c94559b3f319e0.png
[70 5]: /images/20220528/c50f67caa90743c6922600ce3ac4a3f0.png
[https_github.com_awhen_MarkDownDemo]: https://github.com/awhen/MarkDownDemo