CKEditor实现图片上传

public class ImageUpload extends WebSupport {  
    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 fileUpload() throws IOException{  
        //HttpServletResponse response = ServletActionContext.getResponse();  
        getResponse().setCharacterEncoding("utf-8");  
        PrintWriter out =  getResponse().getWriter();    
        // CKEditor提交的很重要的一个参数    
        String callback = getRequest().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);    
        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    
        out.println("<script type=\"text/javascript\">");      
        out.println("window.parent.CKEDITOR.tools.callFunction(" + callback + ",‘" + "/eHomePlus/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;  
    }  
}