使用summernote编辑器上传图片，重写onImageUpload

JS部分：
$('.summernote').summernote({
    height: 200,//高度
    tabsize: 2,//页面上的summernote编辑框的个数
    lang: 'zh-CN',//语言
    callbacks:{//回调函数，重写onImageUpload方法
        onImageUpload: function(files, editor, welEditable) {
            sendFile(this,files[0],editor,welEditable);
        }
    }
});

function sendFile(val,files,editor,welEditable) {
    data = new FormData();
    data.append("files", files);
    $.ajax({
        data: data,
        dataType: 'json',
        type: "POST",
        url: "后台url",
        cache: false,
        contentType: false,
        processData: false,
        responseType: "json",
        success: function(data) {
            $(val).summernote('editor.insertImage', data.path);
        },
        error: function(XMLHttpRequest, textStatus, errorThrown) {
            alert(XMLHttpRequest.status);
            alert(XMLHttpRequest.readyState);
            alert(textStatus);
        }
    });
}

springmvc后台：

@RequestMapping(value = "ajaxUploadFile",produces="application/json;charset=UTF-8")
@ResponseBody
public void ajaxUploadFile(@RequestParam("files") CommonsMultipartFile myfiles, HttpServletRequest request,HttpServletResponse response) {

    int size = 0;
    String fileLogicName = "";
    PageData pageData = new PageData();
    UUID uuid = UUID.randomUUID();
    String[] fileNames = myfiles.getOriginalFilename().split("\\.");
    String suffix = fileNames[1];
    String fileName = uuid.toString().replace("-", "");  // 文件重命名
    if (fileNames.length >= 2) {
        fileName += "." + fileNames[1];
    }

    String relPath = FilePathUtil.getUploadTempPath(request) + fileName;
    String filePath = FilePathUtil.getFileRootPath(request) + relPath;// 文件保存的实际路径
    File localFile = new File(filePath);
    if (!localFile.getParentFile().exists()) {
        localFile.getParentFile().mkdirs();
    }

    try {
        size = myfiles.getBytes().length;
        fileLogicName = myfiles.getOriginalFilename();
        myfiles.transferTo(localFile); // 保存文件
    } catch (IOException e) {
        pageData.setResult(2);
        pageData.setDesc("上传文件失败");
        logger.error("上传文件失败", e);
    }
    relPath = relPath.replace("\\", "/").replace("//", "/");

    pageData.setResult(1);
    pageData.setDesc("文件添加成功！");
    relPath = relPath.replace("\\", "/").replace("//", "/");
    FileInfo fileInfo = new FileInfo();
    fileInfo.setFileSize(size);
    fileInfo.setFileName(fileName);
    fileInfo.setFilePath(relPath);
    fileInfo.setSuffix(suffix);
    fileInfo.setFullFileUrl(relPath);
    fileInfo.setFileLogicName(fileLogicName);
    StringBuffer stringBuffer = new StringBuffer();
    stringBuffer.append("{");
    stringBuffer.append("\"result\"" + ":" + "\"" + pageData.getResult() + "\",");
    stringBuffer.append("\"desc\"" + ":" + "\"" + pageData.getDesc() + "\",");
    stringBuffer.append("\"fileSize\"" + ":" + "\"" + fileInfo.getFileSize() + "\",");
    stringBuffer.append("\"fileName\"" + ":" + "\"" + fileInfo.getFileName() + "\",");
    stringBuffer.append("\"filePath\"" + ":" + "\"" + fileInfo.getFilePath() + "\",");
    stringBuffer.append("\"suffix\"" + ":" + "\"" + fileInfo.getSuffix() + "\",");
    stringBuffer.append("\"fullFileUrl\"" + ":" + "\"" + fileInfo.getFullFileUrl() + "\",");
    stringBuffer.append("\"fileLogicName\"" + ":" + "\"" + fileInfo.getFileLogicName() + "\"");
    stringBuffer.append("}");
    try {
        //response.setContentType("text/javascript");
        response.setContentType("text/html; charset=utf-8");
        response.getWriter().print(stringBuffer.toString());
    } catch (IOException e) {

    }
}

FileInfo实体类

package com.cec.test;
public class FileInfo {

    private Integer  fileSize;

    private String fileName;

    private String filePath;

    private String suffix;

    private String  fullFileUrl;

    private String  fileLogicName;


    public Integer getFileSize() {
        return fileSize;
    }

    public void setFileSize(Integer fileSize) {
        this.fileSize = fileSize;
    }

    public String getFileName() {
        return fileName;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    public String getFilePath() {
        return filePath;
    }

    public void setFilePath(String filePath) {
        this.filePath = filePath;
    }

    public String getSuffix() {
        return suffix;
    }

    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }

    public String getFullFileUrl() {
        return fullFileUrl;
    }

    public void setFullFileUrl(String fullFileUrl) {
        this.fullFileUrl = fullFileUrl;
    }

    public String getFileLogicName() {
        return fileLogicName;
    }

    public void setFileLogicName(String fileLogicName) {
        this.fileLogicName = fileLogicName;
    }
}

FilePathUtil工具类

public static String  getUploadTempPath(HttpServletRequest request){

    String currentDateStr = DateUtil.sdfDays.format(new Date());
    StringBuffer downloadPath = new StringBuffer();
    downloadPath.append( File.separator).append(FILE_UPLOAD_TEMP_PATH)
            .append(File.separator).append(currentDateStr)
            .append(File.separator);
    // 解决掉前台jsp展示的时候出现 转义字符问题
    String  filepath = downloadPath.toString().replace("\\", "/").replace("//","/");

    return  filepath;
}

public static String getRelPath(HttpServletRequest request, String path){
    String filepath = new  StringBuffer (getFileRootPath(request)).append(path).toString();
    filepath = filepath.toString().replace("\\", "/").replace("//","/");
    File dir = new File(filepath);
    if (!dir.exists()) {
        boolean makeSucess = dir.mkdirs();
        if(!makeSucess){
            logger.error("创建文件目录失败：" +  filepath);
        }
    }
    return filepath;
}

//PageDate类 
//用于后台向前台响应ajax请求返回的对象

@Component
public class PageData {
    private int result;
    private Map<Object,Object>  resultMap;
    private String desc;

    public int getResult() {
        return result;
    }

    public void setResult(int result) {
        this.result = result;
    }

    public Map<Object,Object> getResultMap() {

        //统一分配资源
        if(resultMap == null){
            resultMap = new HashMap<Object,Object>();
        }

        return resultMap;
    }

    public void setResultMap(Map resultMap) {
        this.resultMap = resultMap;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }
}
展示：

//UUID类可上网百度获得，工作之后初次使用summernote的使用经验。

场景：公司项目是一个页面上有两个富文本编辑框，和一个保存按钮
解决思路：在用户点击图片按钮，上传图片的时候，调用回调函数，将图片通过FormData对象传到后台，后台将图片暂时保存到临时图片文件夹，返回临时图片地址。
前台接收到图片地址之后，将图片插入到富文本编辑框内。当用户点击保存时，将临时文件夹中的图片保存到真实图片保存目录下（这样做的目的是为了解决维护人员不会把临时文件删除掉，看个人需求）。
通过summernote('code')获取文本框内的内容，通过ajax传到后台，后台接收到参数之后，使用正则表达式替换掉临时文件夹的目录，最终返回真实图片保存目录，将真实图片保存目录保存到数据库。

//备注：解决思路中的保存步骤代码在此处没有展示。

总结：思路很重要，先理清思路，再动手不迟！