一、背景

前端使用 UEditor 富文本编辑器，前后端分离情况下，需要后端提供一个接口实现文件上传功能
本文根据文章：vue+Ueditor集成 [前后端分离项目][图片、文件上传][富文本编辑] 的思路，对项目进行对应修改，配合前端实现 UEditor 上传功能

二、实现步骤

1. 源码
   在git仓库：https://github.com/coderliguoqing/UeditorSpringboot 下载源码
2. 复制文件

• 复制配置文件：/ueditor-demo/src/main/resources/config.json 到项目的resources 文件下
• 复制实现类文件夹：/ueditor-demo/src/main/java/cn/com/lee/common/ueditor 到项目的工具类文件下
• 删除多余启动类文件：/util/SpringUtil.java

3. 修改代码
   3.1 引入maven依赖

<dependency>
    <groupId>org.json</groupId>
    <artifactId>json</artifactId>
    <version>20201115</version>
</dependency>

<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.4</version>
</dependency>

3.2 新建接口，给前端调用

/**
 * UEditor 富文本编辑器-后端文件上传功能
 *
 * @param request request
 * @return java.lang.String
 * @author linc
 * @date 2021/2/25 下午5:10
 */
@ResponseBody
@RequestMapping(value = "/ueditor/upload")
public String ueditorUpload(HttpServletRequest request) throws UnsupportedEncodingException {
    request.setCharacterEncoding("utf-8");
	String rootPath = request.getSession().getServletContext().getRealPath("/");
    return new ActionEnter(request, rootPath).exec();
}

3.3 在测试环境出现【配置文件初始化失败】的提示，本地正常

需要修改 /util/ueditor/ConfigManager.java 文件中 initEnv 方法，读取配置部分的代码

package com.fb.crm.util.ueditor;

import java.io.*;
import java.util.HashMap;
import java.util.Map;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.springframework.core.io.ClassPathResource;

import com.fb.crm.util.ueditor.define.ActionMap;

/**
 * 配置管理器
 *
 * @author hancong03@baidu.com
 */
public final class ConfigManager {

    private final String rootPath;
    private final String originalPath;
    private final String contextPath;
    private static final String configFileName = "config.json";
    private String parentPath = null;
    private JSONObject jsonConfig = null;
    // 涂鸦上传filename定义
    private final static String SCRAWL_FILE_NAME = "scrawl";
    // 远程图片抓取filename定义
    private final static String REMOTE_FILE_NAME = "remote";

    /*
     * 通过一个给定的路径构建一个配置管理器， 该管理器要求地址路径所在目录下必须存在config.properties文件
     */
    private ConfigManager(String rootPath, String contextPath, String uri) throws FileNotFoundException, IOException {

        rootPath = rootPath.replace("\\", "/");

        this.rootPath = rootPath;
        this.contextPath = contextPath;
        this.originalPath = "src/main/resources/config.json";

        this.initEnv();

    }

    /**
     * 配置管理器构造工厂
     *
     * @param rootPath    服务器根路径
     * @param contextPath 服务器所在项目路径
     * @param uri         当前访问的uri
     * @return 配置管理器实例或者null
     */
    public static ConfigManager getInstance(String rootPath, String contextPath, String uri) {

        try {
            return new ConfigManager(rootPath, contextPath, uri);
        } catch (Exception e) {
            return null;
        }

    }

    // 验证配置文件加载是否正确
    public boolean valid() {
        return this.jsonConfig != null;
    }

    public JSONObject getAllConfig() {

        return this.jsonConfig;

    }

    public Map<String, Object> getConfig(int type) throws JSONException {

        Map<String, Object> conf = new HashMap<String, Object>();
        String savePath = null;
        String localSavePathPrefix = null;

        switch (type) {

            case ActionMap.UPLOAD_FILE:
                conf.put("isBase64", "false");
                conf.put("maxSize", this.jsonConfig.getLong("fileMaxSize"));
                conf.put("allowFiles", this.getArray("fileAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("fileFieldName"));
                savePath = this.jsonConfig.getString("filePathFormat");
                break;

            case ActionMap.UPLOAD_IMAGE:
                conf.put("isBase64", "false");
                conf.put("maxSize", this.jsonConfig.getLong("imageMaxSize"));
                conf.put("allowFiles", this.getArray("imageAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("imageFieldName"));
                savePath = this.jsonConfig.getString("imagePathFormat");
                localSavePathPrefix = this.jsonConfig.getString("localSavePathPrefix");
                break;

            case ActionMap.UPLOAD_VIDEO:
                conf.put("maxSize", this.jsonConfig.getLong("videoMaxSize"));
                conf.put("allowFiles", this.getArray("videoAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("videoFieldName"));
                savePath = this.jsonConfig.getString("videoPathFormat");
                localSavePathPrefix = this.jsonConfig.getString("localSavePathPrefix");
                break;

            case ActionMap.UPLOAD_SCRAWL:
                conf.put("filename", ConfigManager.SCRAWL_FILE_NAME);
                conf.put("maxSize", this.jsonConfig.getLong("scrawlMaxSize"));
                conf.put("fieldName", this.jsonConfig.getString("scrawlFieldName"));
                conf.put("isBase64", "true");
                savePath = this.jsonConfig.getString("scrawlPathFormat");
                break;

            case ActionMap.CATCH_IMAGE:
                conf.put("filename", ConfigManager.REMOTE_FILE_NAME);
                conf.put("filter", this.getArray("catcherLocalDomain"));
                conf.put("maxSize", this.jsonConfig.getLong("catcherMaxSize"));
                conf.put("allowFiles", this.getArray("catcherAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("catcherFieldName") + "[]");
                savePath = this.jsonConfig.getString("catcherPathFormat");
                localSavePathPrefix = this.jsonConfig.getString("localSavePathPrefix");
                break;

            case ActionMap.LIST_IMAGE:
                conf.put("allowFiles", this.getArray("imageManagerAllowFiles"));
                conf.put("dir", this.jsonConfig.getString("imageManagerListPath"));
                conf.put("count", this.jsonConfig.getInt("imageManagerListSize"));
                break;

            case ActionMap.LIST_FILE:
                conf.put("allowFiles", this.getArray("fileManagerAllowFiles"));
                conf.put("dir", this.jsonConfig.getString("fileManagerListPath"));
                conf.put("count", this.jsonConfig.getInt("fileManagerListSize"));
                break;

        }

        conf.put("savePath", savePath);
        conf.put("localSavePathPrefix", localSavePathPrefix);
        conf.put("rootPath", this.rootPath);

        return conf;

    }

    private void initEnv() throws FileNotFoundException, IOException {
        ClassPathResource resource = new ClassPathResource("config.json");
        String configContent = readFileByInputStream(resource.getInputStream());
        try {
            JSONObject jsonConfig = new JSONObject(configContent);
            this.jsonConfig = jsonConfig;
        } catch (Exception e) {
            this.jsonConfig = null;
        }

    }

    private String getConfigPath() {
        return this.parentPath + File.separator + ConfigManager.configFileName;
    }

    private String[] getArray(String key) throws JSONException {

        JSONArray jsonArray = this.jsonConfig.getJSONArray(key);
        String[] result = new String[jsonArray.length()];

        for (int i = 0, len = jsonArray.length(); i < len; i++) {
            result[i] = jsonArray.getString(i);
        }

        return result;

    }

    private String readFileByInputStream(InputStream inputStream) throws IOException {

        StringBuilder builder = new StringBuilder();

        try {

            InputStreamReader reader = new InputStreamReader(inputStream, "UTF-8");
            BufferedReader bfReader = new BufferedReader(reader);

            String tmpContent = null;

            while ((tmpContent = bfReader.readLine()) != null) {
                builder.append(tmpContent);
            }

            bfReader.close();

        } catch (UnsupportedEncodingException e) {
            // 忽略
        }

        return this.filter(builder.toString());

    }

    private String readFile(String path) throws IOException {

        StringBuilder builder = new StringBuilder();

        try {

            InputStreamReader reader = new InputStreamReader(new FileInputStream(path), "UTF-8");
            BufferedReader bfReader = new BufferedReader(reader);

            String tmpContent = null;

            while ((tmpContent = bfReader.readLine()) != null) {
                builder.append(tmpContent);
            }

            bfReader.close();

        } catch (UnsupportedEncodingException e) {
            // 忽略
        }

        return this.filter(builder.toString());

    }

    // 过滤输入字符串, 剔除多行注释以及替换掉反斜杠
    private String filter(String input) {

        return input.replaceAll("/\\*[\\s\\S]*?\\*/", "");

    }

}

3.4 修改 /ueditor/upload/StorageManager.java 源代码中 TODO 的部分，实现上传到七牛云的功能

package com.fb.crm.util.ueditor.upload;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import com.fb.crm.component.QiniuComponent;
import org.apache.commons.io.FileUtils;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import com.fb.crm.util.ueditor.define.AppInfo;
import com.fb.crm.util.ueditor.define.BaseState;
import com.fb.crm.util.ueditor.define.State;

@Component
@ConfigurationProperties(prefix = "nginx")
public class StorageManager {

    @Resource
    private QiniuComponent qiniuComponent;

    /**
     * 维护一个本类的静态变量
     */
    private static StorageManager storageManager;

    /**
     * 初始化的时候，将本类中的sysConfigManager赋值给静态的本类变量
     */
    @PostConstruct
    public void init() {
        storageManager = this;
        storageManager.qiniuComponent = this.qiniuComponent;
    }

    public static final int BUFFER_SIZE = 8192;

    private static String fileurl;

    public static String getFileurl() {
        return fileurl;
    }

    public static void setFileurl(String fileurl) {
        StorageManager.fileurl = fileurl;
    }

    public static int getBufferSize() {
        return BUFFER_SIZE;
    }

    public StorageManager() {
    }

    public static State saveBinaryFile(byte[] data, String path) {
        File file = new File(path);

        State state = valid(file);

        if (!state.isSuccess()) {
            return state;
        }

        try {
            BufferedOutputStream bos = new BufferedOutputStream(
                    new FileOutputStream(file));
            bos.write(data);
            bos.flush();
            bos.close();
        } catch (IOException ioe) {
            return new BaseState(false, AppInfo.IO_ERROR);
        }

        state = new BaseState(true, file.getAbsolutePath());
        state.putInfo("size", data.length);
        state.putInfo("title", file.getName());
        return state;
    }

    public static State saveFileByInputStream(HttpServletRequest request, InputStream is, String path, String picName,
                                              long maxSize) {

        State state = null;
        File tmpFile = getTmpFile();
        byte[] dataBuf = new byte[2048];

        try {
            //转成字节流
            ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
            int rc = 0;
            while ((rc = is.read(dataBuf, 0, 100)) > 0) {
                swapStream.write(dataBuf, 0, rc);
            }

            dataBuf = swapStream.toByteArray();
            swapStream.flush();
            swapStream.close();

            if (tmpFile.length() > maxSize) {
                tmpFile.delete();
                return new BaseState(false, AppInfo.MAX_SIZE);
            }

            // 此处调用文件上传服务，并获取返回结果返回
            String uploadUrl = storageManager.qiniuComponent.uploadBytes(dataBuf, picName);

            boolean success = true;
            //如果上传成功
            if (success) {
                state = new BaseState(true);
                state.putInfo("size", tmpFile.length());
                //文件名填入此处
                state.putInfo("title", uploadUrl.replace(storageManager.qiniuComponent.getBucketHost() + "/", ""));
                //所属group填入此处
                state.putInfo("group", "");
                //文件访问的url填入此处
                state.putInfo("url", uploadUrl);
                tmpFile.delete();
            } else {
                state = new BaseState(false, 4);
                tmpFile.delete();
            }

            return state;

        } catch (IOException e) {
        }
        return new BaseState(false, AppInfo.IO_ERROR);
    }

    public static State saveFileByInputStream(InputStream is, String path, String picName) {
        State state = null;

        File tmpFile = getTmpFile();

        byte[] dataBuf = new byte[2048];
        BufferedInputStream bis = new BufferedInputStream(is, StorageManager.BUFFER_SIZE);

        try {
            BufferedOutputStream bos = new BufferedOutputStream(
                    new FileOutputStream(tmpFile), StorageManager.BUFFER_SIZE);

            int count = 0;
            while ((count = bis.read(dataBuf)) != -1) {
                bos.write(dataBuf, 0, count);
            }
            bos.flush();
            bos.close();

            //state = saveTmpFile(tmpFile, path);
            //重新将文件转成文件流的方式
//       InputStream in = new FileInputStream(tmpFile);
//       UploadUtils uploadUtils = new UploadUtils();
//       boolean success = uploadUtils.uploadFile(in, path, picName);
            boolean success = true;

            //如果上传成功
            if (success) {
                state = new BaseState(true);
                state.putInfo("size", tmpFile.length());
                state.putInfo("title", tmpFile.getName());
                tmpFile.delete();
            } else {
                state = new BaseState(false, 4);
                tmpFile.delete();
            }

            return state;
        } catch (IOException e) {
        }
        return new BaseState(false, AppInfo.IO_ERROR);
    }

    private static File getTmpFile() {
        File tmpDir = FileUtils.getTempDirectory();
        String tmpFileName = (Math.random() * 10000 + "").replace(".", "");
        return new File(tmpDir, tmpFileName);
    }

    private static State saveTmpFile(File tmpFile, String path) {
        State state = null;
        File targetFile = new File(path);

        if (targetFile.canWrite()) {
            return new BaseState(false, AppInfo.PERMISSION_DENIED);
        }
        try {
            FileUtils.moveFile(tmpFile, targetFile);
        } catch (IOException e) {
            return new BaseState(false, AppInfo.IO_ERROR);
        }

        state = new BaseState(true);
        state.putInfo("size", targetFile.length());
        state.putInfo("title", targetFile.getName());

        return state;
    }

    private static State valid(File file) {
        File parentPath = file.getParentFile();

        if ((!parentPath.exists()) && (!parentPath.mkdirs())) {
            return new BaseState(false, AppInfo.FAILED_CREATE_FILE);
        }

        if (!parentPath.canWrite()) {
            return new BaseState(false, AppInfo.PERMISSION_DENIED);
        }

        return new BaseState(true);
    }
}

场景：在前端的富文本编辑器编辑内容后,调用保存接口，保存成功后返回给前端的是带标签的文本

处理前：

处理后： 

如何处理：这里的处理用到了正则

ToText(htmls) {//我这边是用到的elementui的table表格，对数组的content(保存的富文本编辑器的编辑内容)字段进行处理，所以把这个数组作为参数
      for (var i = 0; i < htmls.length; i++) {
        console.log(htmls[i].content, 'before-------')//打印处理前的数据
        let s = htmls[i].content.replace(/<(style|script|iframe)[^>]*?>[\s\S]+?<\/\1\s*>/gi, '').replace(/<[^>]+?>/g, '').replace(/\s+/g, ' ').replace(/ /g, ' ').replace(/>/g, ' ')
        htmls[i].content = s//处理好后重新赋值给这个数组
        console.log(htmls[i].content, 'after---------')
      }
    },

亲测有效，大家快试试吧！ 

SpringBoot后端百度富文本编辑器的做法（Java）

1.后端加载百度富文本编辑器的配置文件congfig.json,本项目放在resources下的static.ueditor下

congfig.json：

{
    /* 上传图片配置项 */
    "imageActionName": "uploadimage", /* 执行上传图片的action名称 */
    "imageFieldName": "upfile", /* 提交的图片表单名称 */
    "imageMaxSize": 2048000, /* 上传大小限制，单位B */
    "imageAllowFiles": [".png", ".jpg", ".jpeg", ".gif", ".bmp"], /* 上传图片格式显示 */
    "imageCompressEnable": true, /* 是否压缩图片,默认是true */
    "imageCompressBorder": 1600, /* 图片压缩最长边限制 */
    "imageInsertAlign": "none", /* 插入的图片浮动方式 */
    "imageUrlPrefix": "", /* 图片访问路径前缀 */
    "imagePathFormat": "/ueditor/jsp/upload/image/{yyyy}{mm}{dd}/{time}{rand:6}", /* 上传保存路径,可以自定义保存路径和文件名格式 */
                                /* {filename} 会替换成原文件名,配置这项需要注意中文乱码问题 */
                                /* {rand:6} 会替换成随机数,后面的数字是随机数的位数 */
                                /* {time} 会替换成时间戳 */
                                /* {yyyy} 会替换成四位年份 */
                                /* {yy} 会替换成两位年份 */
                                /* {mm} 会替换成两位月份 */
                                /* {dd} 会替换成两位日期 */
                                /* {hh} 会替换成两位小时 */
                                /* {ii} 会替换成两位分钟 */
                                /* {ss} 会替换成两位秒 */
                                /* 非法字符 \ : * ? " < > | */
                                /* 具请体看线上文档: fex.baidu.com/ueditor/#use-format_upload_filename */

    /* 涂鸦图片上传配置项 */
    "scrawlActionName": "uploadscrawl", /* 执行上传涂鸦的action名称 */
    "scrawlFieldName": "upfile", /* 提交的图片表单名称 */
    "scrawlPathFormat": "/ueditor/jsp/upload/image/{yyyy}{mm}{dd}/{time}{rand:6}", /* 上传保存路径,可以自定义保存路径和文件名格式 */
    "scrawlMaxSize": 2048000, /* 上传大小限制，单位B */
    "scrawlUrlPrefix": "", /* 图片访问路径前缀 */
    "scrawlInsertAlign": "none",

    /* 截图工具上传 */
    "snapscreenActionName": "uploadimage", /* 执行上传截图的action名称 */
    "snapscreenPathFormat": "/ueditor/jsp/upload/image/{yyyy}{mm}{dd}/{time}{rand:6}", /* 上传保存路径,可以自定义保存路径和文件名格式 */
    "snapscreenUrlPrefix": "", /* 图片访问路径前缀 */
    "snapscreenInsertAlign": "none", /* 插入的图片浮动方式 */

    /* 抓取远程图片配置 */
    "catcherLocalDomain": ["127.0.0.1", "localhost", "img.baidu.com"],
    "catcherActionName": "catchimage", /* 执行抓取远程图片的action名称 */
    "catcherFieldName": "source", /* 提交的图片列表表单名称 */
    "catcherPathFormat": "/ueditor/jsp/upload/image/{yyyy}{mm}{dd}/{time}{rand:6}", /* 上传保存路径,可以自定义保存路径和文件名格式 */
    "catcherUrlPrefix": "", /* 图片访问路径前缀 */
    "catcherMaxSize": 2048000, /* 上传大小限制，单位B */
    "catcherAllowFiles": [".png", ".jpg", ".jpeg", ".gif", ".bmp"], /* 抓取图片格式显示 */

    /* 上传视频配置 */
    "videoActionName": "uploadvideo", /* 执行上传视频的action名称 */
    "videoFieldName": "upfile", /* 提交的视频表单名称 */
    "videoPathFormat": "/ueditor/jsp/upload/video/{yyyy}{mm}{dd}/{time}{rand:6}", /* 上传保存路径,可以自定义保存路径和文件名格式 */
    "videoUrlPrefix": "", /* 视频访问路径前缀 */
    "videoMaxSize": 102400000, /* 上传大小限制，单位B，默认100MB */
    "videoAllowFiles": [
        ".flv", ".swf", ".mkv", ".avi", ".rm", ".rmvb", ".mpeg", ".mpg",
        ".ogg", ".ogv", ".mov", ".wmv", ".mp4", ".webm", ".mp3", ".wav", ".mid"], /* 上传视频格式显示 */

    /* 上传文件配置 */
    "fileActionName": "uploadfile", /* controller里,执行上传视频的action名称 */
    "fileFieldName": "upfile", /* 提交的文件表单名称 */
    "filePathFormat": "/ueditor/jsp/upload/file/{yyyy}{mm}{dd}/{time}{rand:6}", /* 上传保存路径,可以自定义保存路径和文件名格式 */
    "fileUrlPrefix": "", /* 文件访问路径前缀 */
    "fileMaxSize": 51200000, /* 上传大小限制，单位B，默认50MB */
    "fileAllowFiles": [
        ".png", ".jpg", ".jpeg", ".gif", ".bmp",
        ".flv", ".swf", ".mkv", ".avi", ".rm", ".rmvb", ".mpeg", ".mpg",
        ".ogg", ".ogv", ".mov", ".wmv", ".mp4", ".webm", ".mp3", ".wav", ".mid",
        ".rar", ".zip", ".tar", ".gz", ".7z", ".bz2", ".cab", ".iso",
        ".doc", ".docx", ".xls", ".xlsx", ".ppt", ".pptx", ".pdf", ".txt", ".md", ".xml"
    ], /* 上传文件格式显示 */

    /* 列出指定目录下的图片 */
    "imageManagerActionName": "listimage", /* 执行图片管理的action名称 */
    "imageManagerListPath": "/ueditor/jsp/upload/image/", /* 指定要列出图片的目录 */
    "imageManagerListSize": 20, /* 每次列出文件数量 */
    "imageManagerUrlPrefix": "", /* 图片访问路径前缀 */
    "imageManagerInsertAlign": "none", /* 插入的图片浮动方式 */
    "imageManagerAllowFiles": [".png", ".jpg", ".jpeg", ".gif", ".bmp"], /* 列出的文件类型 */

    /* 列出指定目录下的文件 */
    "fileManagerActionName": "listfile", /* 执行文件管理的action名称 */
    "fileManagerListPath": "/ueditor/jsp/upload/file/", /* 指定要列出文件的目录 */
    "fileManagerUrlPrefix": "", /* 文件访问路径前缀 */
    "fileManagerListSize": 20, /* 每次列出文件数量 */
    "fileManagerAllowFiles": [
        ".png", ".jpg", ".jpeg", ".gif", ".bmp",
        ".flv", ".swf", ".mkv", ".avi", ".rm", ".rmvb", ".mpeg", ".mpg",
        ".ogg", ".ogv", ".mov", ".wmv", ".mp4", ".webm", ".mp3", ".wav", ".mid",
        ".rar", ".zip", ".tar", ".gz", ".7z", ".bz2", ".cab", ".iso",
        ".doc", ".docx", ".xls", ".xlsx", ".ppt", ".pptx", ".pdf", ".txt", ".md", ".xml"
    ] /* 列出的文件类型 */

}

2.直接写后端的controller，前端直接调用接口dispatch接口，初始化的时候action的值是config空，本文只写了上传图片当action的值是uploadimage上传图片

import cn.thinkjoy.springboot.business.response.HttpResponse;
import cn.thinkjoy.springboot.homework.utils.ResultUtil;
import cn.thinkjoy.springboot.utils.CodeProduceUtil;
import cn.thinkjoy.springboot.utils.UploadUtIl;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baidu.ueditor.define.AppInfo;
import com.baidu.ueditor.define.BaseState;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import org.apache.commons.io.FilenameUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.Iterator;


/**
 * 〈功能简述〉<br>
 * 〈〉
 *
 * @author leichunhong
 * @create 2020-11-09
 * @since 1.0.0
 */
@RestController
@RequestMapping("/upload")
@Api(value = "文件上传", tags = "文件上传")
public class Upload {

    @Value("${file.uploadFolder}")
    private String uploadFolder;

    @Value("${file.upload.nama}")
    private String reurl;

    
    @CrossOrigin
    @RequestMapping(value = "/dispatch", method = {RequestMethod.POST, RequestMethod.GET})
    public void config(HttpServletRequest request, HttpServletResponse response, String action) throws MultipartException {
        response.setContentType("application/json");
        String  path="";
        try {
            //获取config.json的地址读取
            if ("config".equals(action)) {    //如果是初始化
                String file = "static/ueditor/config.json";
                String exec = readFile(request, file);
                response.setCharacterEncoding("UTF-8");
                response.setContentType("application/javascript");
                response.getWriter().write(exec);
                response.getWriter().close();
            } else if ("uploadimage".equals(action)) {    //如果是上传图片、

                //将当前上下文初始化给  CommonsMutipartResolver （多部分解析器）
                CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(
                        request.getSession().getServletContext());
                //检查form中是否有enctype="multipart/form-data"
                if (multipartResolver.isMultipart(request)) {
                    //将request变成多部分request
                    MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
                    //获取multiRequest 中所有的文件名
                    Iterator iter = multiRequest.getFileNames();

                    while (iter.hasNext()) {
                        //一次遍历所有文件
                        MultipartFile multipartFile = multiRequest.getFile(iter.next().toString());
                        if (multipartFile != null) {
                            // 项目在容器中实际发布运行的根路径
                            String realPath = uploadFolder;
                            // 自定义的文件名称
                            String trueFileName = CodeProduceUtil.getCode() + "." + FilenameUtils.getExtension(multipartFile.getOriginalFilename());
                            // 设置存放图片文件的路径
                            path = realPath + trueFileName;
                            File file = new File(path);
                            multipartFile.transferTo(file);
                            path = reurl + "/upload/" + trueFileName;

                            //组装百度上传图片返回连接
                            JSONObject jsonobject = new JSONObject();
                            jsonobject.put("state", "SUCCESS");
                            jsonobject.put("original", multipartFile.getName());
                            jsonobject.put("size", multipartFile.getSize());
                            jsonobject.put("title", "图片");
                            jsonobject.put("type", FilenameUtils.getExtension(multipartFile.getOriginalFilename()));
                            jsonobject.put("url", path);
                            response.setHeader("Access-Control-Allow-Origin", "*");//设置该图片允许跨域访问
                            response.setHeader("Access-Control-Allow-Headers", "X-Requested-With,X_Requested_With");//设置允许的跨域header
                            response.setContentType("application/json;charset=utf-8");
                            response.getWriter().write(jsonobject.toString());
                            response.getWriter().close();
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
        }
    }



    private String readFile(HttpServletRequest request, String file) throws IOException {

        StringBuilder builder = new StringBuilder();

        try {
            InputStream inputStream = ClassLoader.getSystemResourceAsStream(file);
            InputStreamReader reader = new InputStreamReader(inputStream, "UTF-8");
            BufferedReader bfReader = new BufferedReader(reader);

            String tmpContent = null;

            while ((tmpContent = bfReader.readLine()) != null) {
                builder.append(tmpContent);
            }

            bfReader.close();

        } catch (UnsupportedEncodingException e) {
            // 忽略
        }

        JSONObject jSONObject = filter(builder.toString());
        String result = jSONObject.toJSONString();
        String callbackName = request.getParameter("callback");

        if (callbackName != null) {

            if (!validCallbackName(callbackName)) {
                return new BaseState(false, AppInfo.ILLEGAL).toJSONString();
            }

            return callbackName + "(" + result + ");";

        } else {
            return result;
        }
    }


    // 过滤输入字符串, 剔除多行注释以及替换掉反斜杠
    private JSONObject filter(String input) {
        JSONObject jSONObject = JSON.parseObject(input.replaceAll("/\\*[\\s\\S]*?\\*/", ""));
        return jSONObject;
    }

    /**
     * callback参数验证
     */
    public boolean validCallbackName(String name) {
        if (name.matches("^[a-zA-Z_]+[\\w0-9_]*$")) {
            return true;
        }
        return false;
    }


}

3.上传图片的路径和域名配置,图片上传到后端项目的data/file目录下，file.upload.nama是后端项目域名

file.uploadFolder=/data/file/

#上传文件本地域名
file.upload.nama=http://www.xxx.com