引入:
kindeditor.js

前台页面

KindEditor.ready(function(K) {

//初始化编辑器

window.editor = K.create('#promorionText', {

//容器的各项功能

items: [
'source', '|', 'undo', 'redo', '|', 'preview', 'print', 'template', 'code', 'cut', 'copy', 'paste',
'plainpaste', 'wordpaste', '|', 'justifyleft', 'justifycenter', 'justifyright',
'justifyfull', 'insertorderedlist', 'insertunorderedlist', 'indent', 'outdent', 'subscript',
'superscript', 'clearhtml', 'quickformat', 'selectall', '|', 'fullscreen', '/',
'formatblock', 'fontname', 'fontsize', '|', 'forecolor', 'hilitecolor', 'bold',
'italic', 'underline', 'strikethrough', 'lineheight', 'removeformat', '|', 'image', 'multiimage',
'flash', 'media', 'insertfile', 'table', 'hr', 'emoticons', 'baidumap', 'pagebreak',
'anchor', 'link', 'unlink', '|', 'about'
],

//本地图片上传

uploadJson: '../../image_upload.action',

//图片空间管理

fileManagerJson: '../../image_manage.action',

//指定是否开启【浏览服务器】功能

allowFileManager: true
}


);


});

后台接收

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionContext;

import cn.action.common.BaseAction;

/**
 * @date 日期:2017年11月18日
 * @author 作者:kaisen
 *
 *
 */
@ParentPackage("json-default")
@Namespace("/")
@Controller
@Scope("prototype")
public class ImageAction extends BaseAction<Object> {

	private File imgFile;
	private String imgFileFileName;
	private String imgFileContentType;

	public void setImgFile(File imgFile) {
		this.imgFile = imgFile;
	}

	public void setImgFileFileName(String imgFileFileName) {
		this.imgFileFileName = imgFileFileName;
	}

	public void setImgFileContentType(String imgFileContentType) {
		this.imgFileContentType = imgFileContentType;
	}

	// 将文件保存到服务器磁盘上
	@Action(value = "image_upload", results = { @Result(name = "success", type = "json") })
	public String upload() {
		// 接收文件名及文件
		System.out.println("文件：" + imgFile);
		System.out.println("文件名：" + imgFileFileName);
		System.out.println("文件类型：" + imgFileContentType);
		// 绝对路径
		String savePath = ServletActionContext.getServletContext().getRealPath("/upload/");
		// 相对路径
		System.out.println(savePath);
		String saveUrl = ServletActionContext.getRequest().getContextPath() + "/upload/";
		// 将文件保存到磁盘上
		// 图片名随机
		String uid = UUID.randomUUID().toString().replace("-", "");
		String ext = imgFileFileName.substring(imgFileFileName.lastIndexOf("."));
		String randomFileName = uid + ext;

		// 保存文件
		File destFile = new File(savePath + "/" + randomFileName);
		System.out.println(destFile.getAbsolutePath());
		try {
			FileUtils.copyFile(imgFile, destFile);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		// 将文件路径返回至浏览器
		// 通知浏览器文件上传成功
		Map<String, Object> result = new HashMap<String, Object>();
		result.put("error", 0);
		result.put("url", saveUrl + randomFileName); // 返回相对路径
		ActionContext.getContext().getValueStack().push(result);

		return SUCCESS;
	}

	//图片空间管理
	@Action(value = "image_manage", results = { @Result(name = "success", type = "json") })
	public String imageManage() {
		String rootPath = ServletActionContext.getServletContext().getRealPath("/") + "upload/";
		// 根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
		String rootUrl = ServletActionContext.getRequest().getContextPath() + "/upload/";
		// 遍历目录取的文件信息
		List<Map<String, Object>> fileList = new ArrayList<Map<String, Object>>();
		// 当前上传目录
		File currentPathFile = new File(rootPath);
		// 图片扩展名
		String[] fileTypes = new String[] { "gif", "jpg", "jpeg", "png", "bmp" };

		if (currentPathFile.listFiles() != null) {
			for (File file : currentPathFile.listFiles()) {
				Map<String, Object> hash = new HashMap<String, Object>();
				String fileName = file.getName();
				if (file.isDirectory()) {
					hash.put("is_dir", true);
					hash.put("has_file", (file.listFiles() != null));
					hash.put("filesize", 0L);
					hash.put("is_photo", false);
					hash.put("filetype", "");
				} else if (file.isFile()) {
					String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
					hash.put("is_dir", false);
					hash.put("has_file", false);
					hash.put("filesize", file.length());
					hash.put("is_photo", Arrays.<String> asList(fileTypes).contains(fileExt));
					hash.put("filetype", fileExt);
				}
				hash.put("filename", fileName);
				hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));
				fileList.add(hash);
			}
		}
		Map<String, Object> result = new HashMap<String, Object>();
		result.put("moveup_dir_path", "");
		result.put("current_dir_path", rootPath);
		result.put("current_url", rootUrl);
		result.put("total_count", fileList.size());
		result.put("file_list", fileList);
		ActionContext.getContext().getValueStack().push(result);
		return SUCCESS;
	}
}