SpringMVC KindEditor在线编辑器之文件上传代码实例

最近几个项目都要用到在线编辑器，由于之前做在线编辑器都只在php上，对于用java尤其是springmvc框架时，似乎并不如PHP那么简单，搜集了很多博文和资料，全部都不能达到效果，最后在参考各种资料后，自己花时间写了一个上传图片的控制器，亲测保证能用。

1.图片上传控制器

package com.xishan.yueke.view.system;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.Random;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;
import org.json.simple.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.xishan.yueke.view.BaseAction;

/**
 * Class Name: FileManageAction.java
 * Function:
 * 	在线编辑器控制器
 * @author Yang Ji.
 * @DateTime 2015年8月10日 下午8:26:50
 * @version 1.0
 */
@Controller
public class FileManageAction extends BaseAction
{
	// windows
//	private String PATH_LINE = "\\";
	// linux
	private String PATH_LINE = "/";

	/**
	 * 文件上传
	 * @param request {@link HttpServletRequest}
	 * @param response {@link HttpServletResponse}
	 * @return json response
	 */
	@SuppressWarnings("unchecked")
	@RequestMapping(value = "/fileUpload", method = RequestMethod.POST)
	@ResponseBody
	public void fileUpload(HttpServletRequest request,
			HttpServletResponse response,
			@RequestParam("imgFile") MultipartFile[] imgFile) {
		try {
			response.setCharacterEncoding("utf-8");
			PrintWriter out = response.getWriter();

			//文件保存本地目录路径
			String savePath = request.getSession().getServletContext().getRealPath(PATH_LINE) + "kindeditor"+PATH_LINE+"attached"+PATH_LINE;
			//文件保存目录URL
			String saveUrl = request.getContextPath() + PATH_LINE +"kindeditor"+PATH_LINE+"attached"+PATH_LINE;

			if(!ServletFileUpload.isMultipartContent(request)){
				out.print(getError("请选择文件。"));
				out.close();
				return;
			}
			//检查目录
			File uploadDir = new File(savePath);
			if(!uploadDir.isDirectory()){
				out.print(getError("上传目录不存在。"));
				out.close();
				return;
			}
			//检查目录写权限
			if(!uploadDir.canWrite()){
				out.print(getError("上传目录没有写权限。"));
				out.close();
				return;
			}

			String dirName = request.getParameter("dir");
			if (dirName == null) {
				dirName = "image";
			}

			//定义允许上传的文件扩展名
			Map<String, String> extMap = new HashMap<String, String>();
			extMap.put("image", "gif,jpg,jpeg,png,bmp");
			extMap.put("flash", "swf,flv");
			extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
			extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,xml,txt,zip,rar,gz,bz2");

			if(!extMap.containsKey(dirName)){
				out.print(getError("目录名不正确。"));
				out.close();
				return;
			}
			//创建文件夹
			savePath += dirName + PATH_LINE;
			saveUrl += dirName + PATH_LINE;
			File saveDirFile = new File(savePath);
			if (!saveDirFile.exists()) {
				saveDirFile.mkdirs();
			}

			SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
			String ymd = sdf.format(new Date());
			savePath += ymd + PATH_LINE;
			saveUrl += ymd + PATH_LINE;
			File dirFile = new File(savePath);
			if (!dirFile.exists()) {
				dirFile.mkdirs();
			}

			//最大文件大小
			long maxSize = 1000000;

			// 保存文件
			for(MultipartFile iFile : imgFile){
				String fileName = iFile.getOriginalFilename();

				//检查文件大小
				if(iFile.getSize() > maxSize){
					out.print(getError("上传文件大小超过限制。"));
					out.close();
					return;
				}
				//检查扩展名
				String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
				if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){
					//return getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。");
					out.print(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"));
					out.close();
					return;
				}

				SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
				String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;
				try{
					File uploadedFile = new File(savePath, newFileName);

					// 写入文件
					FileUtils.copyInputStreamToFile(iFile.getInputStream(), uploadedFile);
				}catch(Exception e){
					out.print(getError("上传文件失败。"));
					out.close();
					return;
				}

				JSONObject obj = new JSONObject();
				obj.put("error", 0);
				obj.put("url", saveUrl + newFileName); 

				out.print(obj.toJSONString());
				out.close();
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	private Map<String, Object> getError(String errorMsg) {
		Map<String, Object> errorMap = new HashMap<String, Object>();
		errorMap.put("error", 1);
		errorMap.put("message", errorMsg);
		return errorMap;
	}

	/**
	 * 文件空间
	 * @param request {@link HttpServletRequest}
	 * @param response {@link HttpServletResponse}
	 * @return json
	 */
	@SuppressWarnings("unchecked")
	@RequestMapping(value = "/fileManager")
	@ResponseBody
	public void fileManager(HttpServletRequest request, HttpServletResponse response) {
		try {
			//根目录路径，可以指定绝对路径
			String rootPath = request.getSession().getServletContext().getRealPath(PATH_LINE) + "kindeditor"+PATH_LINE+"attached"+PATH_LINE;
			//根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
			String rootUrl = request.getContextPath() + PATH_LINE+"kindeditor"+PATH_LINE+"attached"+PATH_LINE;

			response.setContentType("application/json; charset=UTF-8");
			PrintWriter out = response.getWriter();

			//图片扩展名
			String[] fileTypes = new String[]{"gif", "jpg", "jpeg", "png", "bmp"};

			String dirName = request.getParameter("dir");
			if (dirName != null) {
				if(!Arrays.<String>asList(new String[]{"image", "flash", "media", "file"}).contains(dirName)){
					out.print("无效的文件夹。");
					out.close();
					return;
				}
				rootPath += dirName + PATH_LINE;
				rootUrl += dirName + PATH_LINE;
				File saveDirFile = new File(rootPath);
				if (!saveDirFile.exists()) {
					saveDirFile.mkdirs();
				}
			}
			//根据path参数，设置各路径和URL
			String path = request.getParameter("path") != null ? request.getParameter("path") : "";
			String currentPath = rootPath + path;
			String currentUrl = rootUrl + path;
			String currentDirPath = path;
			String moveupDirPath = "";
			if (!"".equals(path)) {
				String str = currentDirPath.substring(0, currentDirPath.length() - 1);
				moveupDirPath = str.lastIndexOf(PATH_LINE) >= 0 ? str.substring(0, str.lastIndexOf(PATH_LINE) + 1) : "";
			}

			//排序形式，name or size or type
			String order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name";

			//不允许使用..移动到上一级目录
			if (path.indexOf("..") >= 0) {
				out.print("访问权限拒绝。");
				out.close();
				return;
			}
			//最后一个字符不是/
			if (!"".equals(path) && !path.endsWith(PATH_LINE)) {
				out.print("无效的访问参数验证。");
				out.close();
				return;
			}
			//目录不存在或不是目录
			File currentPathFile = new File(currentPath);
			if(!currentPathFile.isDirectory()){
				out.print("文件夹不存在。");
				out.close();
				return;
			}

			//遍历目录取的文件信息
			List<Map<String, Object>> fileList = new ArrayList<Map<String, Object>>();
			if(currentPathFile.listFiles() != null) {
				for (File file : currentPathFile.listFiles()) {
					Hashtable<String, Object> hash = new Hashtable<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);
				}
			}

			if ("size".equals(order)) {
				Collections.sort(fileList, new SizeComparator());
			} else if ("type".equals(order)) {
				Collections.sort(fileList, new TypeComparator());
			} else {
				Collections.sort(fileList, new NameComparator());
			}

			JSONObject result = new JSONObject();
			result.put("moveup_dir_path", moveupDirPath);
			result.put("current_dir_path", currentDirPath);
			result.put("current_url", currentUrl);
			result.put("total_count", fileList.size());
			result.put("file_list", fileList);	

			out.println(result.toJSONString());
			out.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	private class NameComparator implements Comparator<Map<String, Object>> {
		public int compare(Map<String, Object> hashA, Map<String, Object> hashB) {
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String)hashA.get("filename")).compareTo((String)hashB.get("filename"));
			}
		}
	}

	private class SizeComparator implements Comparator<Map<String, Object>> {
		public int compare(Map<String, Object> hashA, Map<String, Object> hashB) {
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				if (((Long)hashA.get("filesize")) > ((Long)hashB.get("filesize"))) {
					return 1;
				} else if (((Long)hashA.get("filesize")) < ((Long)hashB.get("filesize"))) {
					return -1;
				} else {
					return 0;
				}
			}
		}
	}

	private class TypeComparator implements Comparator<Map<String, Object>> {
		public int compare(Map<String, Object> hashA, Map<String, Object> hashB) {
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String)hashA.get("filetype")).compareTo((String)hashB.get("filetype"));
			}
		}
	}
}

2.jsp页面使用方法（在head加入下面代码，替换名为description的编辑区，在此之前需导入kindeditor的相关文件，详见官方文档）

<script type="text/javascript">
	KindEditor.ready(function(K) {
		K.create('textarea[name="descript"]', {
		uploadJson : 'http://localhost:8080/Test/fileUpload.htm',
		        fileManagerJson : 'http://localhost:8080/Test/fileManager.htm',
		        allowFileManager : true,
		        allowImageUpload : true,
		autoHeightMode : true,
		width : "640px",
		height : "400px",
		afterCreate : function() {this.loadPlugin('autoheight');},
			afterBlur : function(){ this.sync(); } //Kindeditor下获取文本框信息
		});
	});
</script>

使用其他的框架（比如Spring+Struts+Hibernate）方法大致相同，最终效果如下：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。