layui富文本编辑器添加图片回显问题详解

青旅半醒 2022-02-16 02:22 441阅读 0赞

最近写项目中需要用到LayUI富文本编辑器，其他地方都挺好，唯独上传图片时，要不就是上传完成后回显404，要不就是访问时404（访问时我是新打开的一个页面），返回路径一直有问题，之后把返回的路径改成绝对路径就可以。

效果图如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjA1MTE2_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjA1MTE2_size_16_color_FFFFFF_t_70 1][]

先添加上传图片接口，layui会自动传递参数，后台直接写对应的上传方法就行了。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjA1MTE2_size_16_color_FFFFFF_t_70 2][]

var layedit = layui.layedit;
    layedit.set({	//设置图片接口
      	uploadImage: {
    	    url: 'layUITextarea/upload', //接口url
    	    type: 'post'
      	}
    });

后台上传完成后需要返回四个参数，layui自定义接收显示（不返回图片无法显示）

layui前台接收返回的数据格式为：

{
          "code": 0,      //0表示成功，其他表示失败
          "msg": "",       //提示信息，//一般上传失败后返回
          "data":  {
               "src": "图片路径",
               "title":  "图片名称"    //可选
          }
    }

所以后台返回需要返回这几个参数

//上传
    @RequestMapping(value="/upload")
    @ResponseBody
    public Object upload(MultipartFile file) {
    	String filename = file.getOriginalFilename();
    	String uuid = UUID.randomUUID().toString();
        //上传的方法在Service层写的，这里直接调用的
    	boolean boole = pService.savefile(file, uuid);
    	if (boole) {
    		Map<String,Object> map = new HashMap<String,Object>();
    		Map<String,Object> map2 = new HashMap<String,Object>();
    		map.put("code", 0);	//0表示上传成功
    		map.put("msg","上传成功"); //提示消息
                    //src返回图片上传成功后的下载路径，这里直接给绝对路径
    		map2.put("src", "http://localhost/layUITextarea/download?uuid="+uuid);
    		map2.put("title", filename);
    		map.put("data", map2);
    		return map;
    	} else {
    		return new AjaxResult(true, file.getOriginalFilename());
    	}
    }
    //下载方法
    @RequestMapping(value = "/download")
    @ResponseBody
    private void download(String uuid, HttpServletRequest request, HttpServletResponse response) {
        fileService.download(uuid, request, response);
    }

Service层上传下载部分代码。

@Service
    public class FileService extends CommonService<FileImg, Integer> {
        @Autowired
        private FileRepository fileRepository;
        // 图片存放位置
        private final static String IMAGEPATH="e:\\layui\\image";
    
        //保存图片
        @Transactional
        public boolean savefile(MultipartFile file, String uuid){
            try{
                File path = path(file.getContentType());
                String filename = file.getOriginalFilename();
                FileImg fileEntity = new FileImg();
                SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                Date date=new Date();
                fileEntity.setFileName(filename);
                fileEntity.setUuid(uuid);
                String storeaddress = path.getAbsolutePath();
                fileEntity.setStoreaddress(storeaddress);
                File saveFile = new File(path,uuid);
                try {
                    fileRepository.save(fileEntity);
                    file.transferTo(saveFile);
                    return true;
                } catch (IllegalStateException | IOException e) {
                    e.printStackTrace();
                    return false;
                }
            }catch (Exception e){
                System.out.println("图片保存异常");
                return false;
            }
        }
    
        //图片地址是否存在
        private File path(String filename) {
            File pat=new File("e:\\layui");
            File path = new File(FileService.IMAGEPATH);
            if(!pat.isDirectory()) {
                pat.mkdir();
            }
            if(!path.isDirectory()) {
                path.mkdir();
            }
            return path;
        }
    
        /**
         * 下载
         * @param uuid
         * @param request
         * @param response
         */
        public void download(String uuid, HttpServletRequest request, HttpServletResponse response) {
            FileImg fileentity = fileRepository.findByUuid(uuid);
            String filename = fileentity.getFileName();
            filename = getStr(request, filename);
            File file = new File(fileentity.getStoreaddress(), uuid);
            if(file.exists()) {
                FileInputStream fis;
                try {
                    fis = new FileInputStream(file);
                    response.setContentType("application/x-msdownload");
                    response.addHeader("Content-Disposition", "attachment; filename=" + filename );
                    ServletOutputStream out = response.getOutputStream();
                    byte[] buf=new byte[2048];
                    int n=0;
                    while((n=fis.read(buf))!=-1){
                        out.write(buf, 0, n);
                    }
                    fis.close();
                    out.flush();
                    out.close();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    
        private String getStr(HttpServletRequest request, String fileName) {
            String downloadFileName = null;
            String agent = request.getHeader("USER-AGENT");
            try {
                if(agent != null && agent.toLowerCase().indexOf("firefox") > 0){
                    //downloadFileName = "=?UTF-8?B?" + (new String(Base64Utils.encode(fileName.getBytes("UTF-8")))) + "?=";
                    //设置字符集
                    downloadFileName = "=?UTF-8?B?" + Base64Utils.encodeToString(fileName.getBytes("UTF-8")) + "?=";
                }else{
                    downloadFileName =  java.net.URLEncoder.encode(fileName, "UTF-8");
                }
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            return downloadFileName;
        }
    }

后台返回src路径时最好加绝对路径，不然添加访问时图片路径会404

关于layui富文本域form表单提交和ajax提交可以访问：[https://blog.csdn.net/qq\_40205116/article/details/89433623][https_blog.csdn.net_qq_40205116_article_details_89433623]

layui富文本域完整案例：[https://blog.csdn.net/qq\_40205116/article/details/89536834][https_blog.csdn.net_qq_40205116_article_details_89536834]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjA1MTE2_size_16_color_FFFFFF_t_70]: /images/20220216/1afab6bd386c477ca8590daf56219564.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjA1MTE2_size_16_color_FFFFFF_t_70 1]: /images/20220216/2453451d145a494995d542e0636a8249.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjA1MTE2_size_16_color_FFFFFF_t_70 2]: /images/20220216/1c7412de9a8542788e6435093395cf0c.png
[https_blog.csdn.net_qq_40205116_article_details_89433623]: https://blog.csdn.net/qq_40205116/article/details/89433623
[https_blog.csdn.net_qq_40205116_article_details_89536834]: https://blog.csdn.net/qq_40205116/article/details/89536834