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。
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