struts2文件和圖片上傳-最完整的

準備：導入commons-io-2.0.1.jar和commons-fileupload-1.2.1.jar，版本可以不一樣


前臺：
      <struts:form action="weiboAction!uploadPicture.shtml" enctype="multipart/form-data" namespace="/" method="post">
        <struts:file name="image" label="文件"></struts:file>
        <struts:submit value="上傳"/>
    </struts:form>




後臺：
    /**
     * 作者：劉鵬
     * 時間：2013-07-07
     * 描述：微博列表中的圖片和文件上傳顯示
     * @return
     */

/*****************以下爲上傳部分*******************************/
    private File image;                        //得到上傳的文件
    private String imageFileName;              //得到文件的名稱，寫法是固定的
    private String imageContentType;           //得到文件的類型


    public String getImageContentType() {
        return imageContentType;
    }
    public void setImageContentType(String imageContentType) {
        this.imageContentType = imageContentType;
    }
    public String getImageFileName() {
        return imageFileName;
    }
    public void setImageFileName(String imageFileName) {
        this.imageFileName = imageFileName;
    }
    public File getImage() {
        return image;
    }
    public void setImage(File image) {
        this.image = image;
    }
    public String addUI(){
        return SUCCESS;
    }
    public String uploadPicture(){
        Weibo model = getModel();
        Date date = new Date();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateString = simpleDateFormat.format(date);
        model.setTime(dateString);
        HttpServletRequest request = ServletActionContext.getRequest() ;
        HttpServletResponse response = ServletActionContext.getResponse();

        //以下爲圖片上傳部分
        //保存到根目錄下的uploadImages文件夾下
        String realPath = ServletActionContext.getServletContext().getRealPath("/uploadImages");    //取得真實路徑
        System.out.println(realPath);
        System.out.println(imageFileName);
        System.out.println(imageContentType);

        //自動命名
    if(imageFileName!=null && imageFileName.length()!=0){
        Random random = new Random(99999);
        int tempInt = random.nextInt();
        Date datenew = new Date();
        SimpleDateFormat simpleDateFormatnew = new SimpleDateFormat("yyyyMMddhhmmss");
        int last = imageFileName.lastIndexOf(".");
        String head = imageFileName.substring(0,last);
        String type = imageFileName.substring(last);
        imageFileName = simpleDateFormatnew.format(datenew) + tempInt + type;
        System.out.println("新的文件名稱是："+imageFileName);

        //創建父文件夾
        if(image!=null){
        File saveFile = new File(new File(realPath), imageFileName);
        if(!saveFile.getParentFile().exists()){     //如果Images文件夾不存在
            saveFile.getParentFile().mkdirs();      //則創建新的多級文件夾

        }
        try {
            FileUtils.copyFile(image, saveFile);     //保存文件
            ActionContext.getContext().put("message", "上傳成功！");

            String path = request.getContextPath();
            String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
            String picturePath = basePath +"uploadImages"+"/"+imageFileName;
            model.setImage(picturePath);

            //request.setAttribute("uploadsuccess", imageFileName);
        } catch (IOException e) {

            e.printStackTrace();
        }
        }
        }else{
            model.setImage("");
        }

        //增加微博的時候將當前登錄人對應的頭像信息路徑加入到微博表中(此時model中已經存在userName)
        String picturePathString = getiWeiboService().selectPicturePath(model);
        model.setAvatar(picturePathString);
        getiWeiboService().insertWeibo(model);

        try {
            response.sendRedirect("jsp/weibo/index.jsp");
        } catch (IOException e) {
            e.printStackTrace();
        }
            }


/*****************以上爲上傳部分*******************************/


後臺將圖片的地址保存到數據庫中
    //先從數據庫中將所有數據讀出來，放入到request中
    request.setAttribute("weibotest", list);


前臺使用OGNL語言讀取出圖片地址，並且顯示圖片
    <s:iterator value="#request.weibotest" var="user">
        <s:property value="#user.getContent()"/>
        <img src ='<s:property value ="#user.getImage()" />' width="200">     //顯示圖片
    </s:iterator>