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本文在http://sarin.javaeye.com/blog/599056介绍的基础之上进行进一步的研究。
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;
- private static boolean debug = false;
- private static boolean enabled = false;
- private static Hashtable allowedExtensions;
- private static Hashtable deniedExtensions;
- private static SimpleDateFormat dirFormatter;
- private static SimpleDateFormat fileFormatter;
-
-
-
- public void init() throws ServletException {
-
- debug = (new Boolean(getInitParameter("debug"))).booleanValue();
- if (debug)
- System.out
- .println("\r\n---- SimpleUploaderServlet initialization started ----");
-
- dirFormatter = new SimpleDateFormat("yyyyMM");
- fileFormatter = new SimpleDateFormat("yyyyMMddHHmmssSSS");
-
- baseDir = getInitParameter("baseDir");
-
- 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();
- }
-
- allowedExtensions = new Hashtable(3);
- deniedExtensions = new Hashtable(3);
-
- 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();
-
- String typeStr = request.getParameter("Type");
- if (typeStr == null) {
- typeStr = "File";
- }
- if (debug)
- System.out.println(typeStr);
-
- Date dNow = new Date();
-
- String currentPath = baseDir + typeStr + "/"
- + dirFormatter.format(dNow);
-
- String currentDirPath = getServletContext().getRealPath(currentPath);
-
- File dirTest = new File(currentDirPath);
- if (!dirTest.exists()) {
- dirTest.mkdirs();
- }
-
- currentPath = request.getContextPath() + currentPath;
- if (debug)
- System.out.println(currentDirPath);
-
- String newName = "";
- String fileUrl = "";
- if (enabled) {
-
- 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);
- }
-
- FileItem uplFile = (FileItem) fields.get("upload");
-
- String fileNameLong = uplFile.getName();
- fileNameLong = fileNameLong.replace('\\', '/');
- String[] pathParts = fileNameLong.split("/");
- String fileName = pathParts[pathParts.length - 1];
-
- String ext = getExtension(fileName);
-
- fileName = fileFormatter.format(dNow) + "." + ext;
-
- 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");
- }
-
- 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 ---");
- }
-
-
-
- private static String getNameWithoutExtension(String fileName) {
- return fileName.substring(0, fileName.lastIndexOf("."));
- }
-
-
-
- private String getExtension(String fileName) {
- return fileName.substring(fileName.lastIndexOf(".") + 1);
- }
-
-
-
- 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;
- }
-
-
-
- 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>
在服务器目录中,上传的文件已经存在其中了。
欢迎交流,希望对使用者有用。
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