CKEditor实现图片上传

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.PrintWriter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts2.ServletActionContext;public class ImgUploadAction { private File upload; // 文件 private String uploadContentType; // 文件类型 private String uploadFileName; // 文件名 /**  * 图片上传  *   * @return  * @throws IOException  */ public String imgUpload() throws IOException {  // 获得response,request  HttpServletResponse response = ServletActionContext.getResponse();  HttpServletRequest request = ServletActionContext.getRequest();  response.setCharacterEncoding("utf-8");  PrintWriter out = response.getWriter();  // CKEditor提交的很重要的一个参数  String callback = request.getParameter("CKEditorFuncNum");  String expandedName = ""; // 文件扩展名  if (uploadContentType.equals("image/pjpeg")    || uploadContentType.equals("image/jpeg")) {   // IE6上传jpg图片的headimageContentType是image/pjpeg，而IE9以及火狐上传的jpg图片是image/jpeg   expandedName = ".jpg";  } else if (uploadContentType.equals("image/png")    || uploadContentType.equals("image/x-png")) {   // IE6上传的png图片的headimageContentType是"image/x-png"   expandedName = ".png";  } else if (uploadContentType.equals("image/gif")) {   expandedName = ".gif";  } else if (uploadContentType.equals("image/bmp")) {   expandedName = ".bmp";  } else {   out.println("<script type=\"text/javascript\">");   out.println("window.parent.CKEDITOR.tools.callFunction(" + callback     + ",''," + "'文件格式不正确（必须为.jpg/.gif/.bmp/.png文件）');");   out.println("</script>");   return null;  }  if (upload.length() > 600 * 1024) {   out.println("<script type=\"text/javascript\">");   out.println("window.parent.CKEDITOR.tools.callFunction(" + callback     + ",''," + "'文件大小不得大于600k');");   out.println("</script>");   return null;  }  InputStream is = new FileInputStream(upload);  //图片上传路径  String uploadPath = ServletActionContext.getServletContext().getRealPath("/img/uploadImg");  String fileName = java.util.UUID.randomUUID().toString(); // 采用时间+UUID的方式随即命名  fileName += expandedName;  File file = new File(uploadPath);  if (!file.exists()) { // 如果路径不存在，创建   file.mkdirs();  }  File toFile = new File(uploadPath, fileName);  OutputStream os = new FileOutputStream(toFile);  byte[] buffer = new byte[1024];  int length = 0;  while ((length = is.read(buffer)) > 0) {   os.write(buffer, 0, length);  }  is.close();  os.close();  // 返回"图像"选项卡并显示图片  request.getContextPath()为web项目名   out.println("<script type=\"text/javascript\">");  out.println("window.parent.CKEDITOR.tools.callFunction(" + callback    + ",'" + request.getContextPath() + "/img/uploadImg/" + fileName + "','')");  out.println("</script>");  return null; } public File getUpload() {  return upload; } public void setUpload(File upload) {  this.upload = upload; } public String getUploadContentType() {  return uploadContentType; } public void setUploadContentType(String uploadContentType) {  this.uploadContentType = uploadContentType; } public String getUploadFileName() {  return uploadFileName; } public void setUploadFileName(String uploadFileName) {  this.uploadFileName = uploadFileName; }}

CKEDITOR.editorConfig = function( config ) {     config.image_previewText=' '; //预览区域显示内容     config.filebrowserImageUploadUrl= "ImgUpload.action"; //要上传的action或servlet };