[ckeditor系列]CKEDITOR 通过SERVLET 打开上传功能
在CKEditor中把上传配置给打开,很简单,脚本段改为如下设置:
<script type="text/javascript"> CKEDITOR.replace('content',{filebrowserUploadUrl : '/ckeditor/ckeditor/uploader?Type=File', filebrowserImageUploadUrl : '/ckeditor/ckeditor/uploader?Type=Image', filebrowserFlashUploadUrl : '/ckeditor/ckeditor/uploader?Type=Flash' }); </script>
这里参数我们可以自己设置,加个Type为了区分文件类型,因为都使用同一个Servlet处理。事情没有这么简单,CKEditor毕竟是个复杂的组件,我们这么配置,看看它给我们还原成什么了吧,在FireFox中使用FireBug查看,看到了这些:
看到了吧,在Type后面它为我们又挂接了几个参数,其中我们需要的是CKEditorFuncNum和file域的name值 upload,CKEditorFuncNum这个参数是用来回调页面的,就是上传成功后,页面自动切换到“图像”选项卡。upload参数是 servlet获取上传文件用的参数名。其余参数就根据需要进行了。
这些参数的名称都是查看源码获得的,不能想当然。有了这些东西后面就好办了,就是文件上传了么。很简单了。这里我们使用apache commons组件中的fileupload和io。
先看web.xml,我们做些设置。
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <servlet> <servlet-name>SimpleUploader</servlet-name> <servlet-class>ckeditor.CKEditorUploadServlet</servlet-class> <init-param> <param-name>baseDir</param-name> <param-value>/UserFiles/</param-value> </init-param> <init-param> <param-name>debug</param-name> <param-value>false</param-value> </init-param> <init-param> <param-name>enabled</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>AllowedExtensionsFile</param-name> <param-value></param-value> </init-param> <init-param> <param-name>DeniedExtensionsFile</param-name> <param-value> html|htm|php|php2|php3|php4|php5|phtml|pwml|inc|asp|aspx|ascx|jsp|cfm|cfc|pl|bat|exe|com|dll|vbs|js|reg|cgi|htaccess|asis|ftl </param-value> </init-param> <init-param> <param-name>AllowedExtensionsImage</param-name> <param-value>jpg|gif|jpeg|png|bmp</param-value> </init-param> <init-param> <param-name>DeniedExtensionsImage</param-name> <param-value></param-value> </init-param> <init-param> <param-name>AllowedExtensionsFlash</param-name> <param-value>swf|fla</param-value> </init-param> <init-param> <param-name>DeniedExtensionsFlash</param-name> <param-value></param-value> </init-param> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>SimpleUploader</servlet-name> <url-pattern>/ckeditor/uploader</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list> </web-app>
主要是Servlet的初始化参数,规定了文件上传的扩展名规则,就是允许上传的类型和阻止上传的类型。分为File,Image和FLASH三种,这个上传参数的设置是对应的。Debug是设置servlet知否进行debug,默认是关闭的。enabled是设置该servlet是否有效,如果禁止上传,就打成false。还有一个baseDir是设定CKEditor上传文件的存放位置。
下面就是实现类了,比较长,但是有详细的注释:
package ckeditor; import java.io.*; import java.text.SimpleDateFormat; import java.util.*; import javax.servlet.ServletException; import javax.servlet.http.*; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class CKEditorUploadServlet extends HttpServlet { private static String baseDir;// CKEditor的根目录 private static boolean debug = false;// 是否debug模式 private static boolean enabled = false;// 是否开启CKEditor上传 private static Hashtable allowedExtensions;// 允许的上传文件扩展名 private static Hashtable deniedExtensions;// 阻止的上传文件扩展名 private static SimpleDateFormat dirFormatter;// 目录命名格式:yyyyMM private static SimpleDateFormat fileFormatter;// 文件命名格式:yyyyMMddHHmmssSSS /** * Servlet初始化方法 */ public void init() throws ServletException { // 从web.xml中读取debug模式 debug = (new Boolean(getInitParameter("debug"))).booleanValue(); if (debug) System.out .println("\r\n---- SimpleUploaderServlet initialization started ----"); // 格式化目录和文件命名方式 dirFormatter = new SimpleDateFormat("yyyyMM"); fileFormatter = new SimpleDateFormat("yyyyMMddHHmmssSSS"); // 从web.xml中获取根目录名称 baseDir = getInitParameter("baseDir"); // 从web.xml中获取是否可以进行文件上传 enabled = (new Boolean(getInitParameter("enabled"))).booleanValue(); if (baseDir == null) baseDir = "/UserFiles/"; String realBaseDir = getServletContext().getRealPath(baseDir); File baseFile = new File(realBaseDir); if (!baseFile.exists()) { baseFile.mkdirs(); } // 实例化允许的扩展名和阻止的扩展名 allowedExtensions = new Hashtable(3); deniedExtensions = new Hashtable(3); // 从web.xml中读取配置信息 allowedExtensions.put("File", stringToArrayList(getInitParameter("AllowedExtensionsFile"))); deniedExtensions.put("File", stringToArrayList(getInitParameter("DeniedExtensionsFile"))); allowedExtensions.put("Image", stringToArrayList(getInitParameter("AllowedExtensionsImage"))); deniedExtensions.put("Image", stringToArrayList(getInitParameter("DeniedExtensionsImage"))); allowedExtensions.put("Flash", stringToArrayList(getInitParameter("AllowedExtensionsFlash"))); deniedExtensions.put("Flash", stringToArrayList(getInitParameter("DeniedExtensionsFlash"))); if (debug) System.out .println("---- SimpleUploaderServlet initialization completed ----\r\n"); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (debug) System.out.println("--- BEGIN DOPOST ---"); response.setContentType("text/html; charset=UTF-8"); response.setHeader("Cache-Control", "no-cache"); PrintWriter out = response.getWriter(); // 从请求参数中获取上传文件的类型:File/Image/Flash String typeStr = request.getParameter("Type"); if (typeStr == null) { typeStr = "File"; } if (debug) System.out.println(typeStr); // 实例化dNow对象,获取当前时间 Date dNow = new Date(); // 设定上传文件路径 String currentPath = baseDir + typeStr + "/" + dirFormatter.format(dNow); // 获得web应用的上传路径 String currentDirPath = getServletContext().getRealPath(currentPath); // 判断文件夹是否存在,不存在则创建 File dirTest = new File(currentDirPath); if (!dirTest.exists()) { dirTest.mkdirs(); } // 将路径前加上web应用名 currentPath = request.getContextPath() + currentPath; if (debug) System.out.println(currentDirPath); // 文件名和文件真实路径 String newName = ""; String fileUrl = ""; if (enabled) { // 使用Apache Common组件中的fileupload进行文件上传 FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); try { List items = upload.parseRequest(request); Map fields = new HashMap(); Iterator iter = items.iterator(); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (item.isFormField()) fields.put(item.getFieldName(), item.getString()); else fields.put(item.getFieldName(), item); } // CEKditor中file域的name值是upload FileItem uplFile = (FileItem) fields.get("upload"); // 获取文件名并做处理 String fileNameLong = uplFile.getName(); fileNameLong = fileNameLong.replace('\\', '/'); String[] pathParts = fileNameLong.split("/"); String fileName = pathParts[pathParts.length - 1]; // 获取文件扩展名 String ext = getExtension(fileName); // 设置上传文件名 fileName = fileFormatter.format(dNow) + "." + ext; // 获取文件名(无扩展名) String nameWithoutExt = getNameWithoutExtension(fileName); File pathToSave = new File(currentDirPath, fileName); fileUrl = currentPath + "/" + fileName; if (extIsAllowed(typeStr, ext)) { int counter = 1; while (pathToSave.exists()) { newName = nameWithoutExt + "_" + counter + "." + ext; fileUrl = currentPath + "/" + newName; pathToSave = new File(currentDirPath, newName); counter++; } uplFile.write(pathToSave); } else { if (debug) System.out.println("无效的文件类型: " + ext); } } catch (Exception ex) { if (debug) ex.printStackTrace(); } } else { if (debug) System.out.println("未开启CKEditor上传功能"); } // CKEditorFuncNum是回调时显示的位置,这个参数必须有 String callback = request.getParameter("CKEditorFuncNum"); out.println("<script type=\"text/javascript\">"); out.println("window.parent.CKEDITOR.tools.callFunction(" + callback + ",'" + fileUrl + "',''" + ")"); out.println("</script>"); out.flush(); out.close(); if (debug) System.out.println("--- END DOPOST ---"); } /** * 获取文件名的方法 */ private static String getNameWithoutExtension(String fileName) { return fileName.substring(0, fileName.lastIndexOf(".")); } /** * 获取扩展名的方法 */ private String getExtension(String fileName) { return fileName.substring(fileName.lastIndexOf(".") + 1); } /** * 字符串像ArrayList转化的方法 */ private ArrayList stringToArrayList(String str) { if (debug) System.out.println(str); String[] strArr = str.split("\\|"); ArrayList tmp = new ArrayList(); if (str.length() > 0) { for (int i = 0; i < strArr.length; ++i) { if (debug) System.out.println(i + " - " + strArr[i]); tmp.add(strArr[i].toLowerCase()); } } return tmp; } /** * 判断扩展名是否允许的方法 */ private boolean extIsAllowed(String fileType, String ext) { ext = ext.toLowerCase(); ArrayList allowList = (ArrayList) allowedExtensions.get(fileType); ArrayList denyList = (ArrayList) deniedExtensions.get(fileType); if (allowList.size() == 0) { if (denyList.contains(ext)) { return false; } else { return true; } } if (denyList.size() == 0) { if (allowList.contains(ext)) { return true; } else { return false; } } return false; } }
只要在页面中的script中设置了上传属性,我们打开图片时就能看到上传选项卡了,选择图片后,点击上传到服务器,上传成功就会自动跳到图像选项卡,可以看到源文件已经存在服务器的目标目录中了,此时,我们就可以在编辑器中编辑上传的图片了,非常方便。
下面我们进行图片上传测试,可以看到如下效果。
提交后可以看到,数据获得效果,是完全一致的,这样使用CKEditor上传文件就已经成功了。
我们查看源文件,得到如下结果。
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Display Content</title> </head> <body> <center> <table width="600" border="0" bordercolor="000000" style="table-layout: fixed;"> <tbody> <tr> <td width="100" bordercolor="ffffff">主题:</td> <td width="500" bordercolor="ffffff">图片上传测试</td> </tr> <tr> <td valign="top" bordercolor="ffffff">内容:</td> <td valign="top" bordercolor="ffffff"> <p style="text-align: center;"><span style="color: #f00;"><strong><span style="font-family: courier new, courier, monospace;"><span style="font-size: 48px;">图片上传测试</span></span></strong></span></p> <p style="text-align: center;"><img alt="" src="/ckeditor/UserFiles/Image/201002/20100217232748000.gif" style="width: 133px; height: 41px;"></p> <p style="text-align: center;"><span style="font-family: courier new, courier, monospace;"><br> </span></p> </td> </tr> </tbody> </table> </center> </body> </html>
原文地址:http://www.cnblogs.com/hannover/archive/2011/07/29/2120580.html