Struts2+FlashFileUpload文件上传并生成缩略图和添加水印(收藏)

以前用过SWFUpload ，功能确实很强大。javaeye上有人发布了这样一篇文章step- by-step多文件WEB批量上传(swfupload)的完美解决方案 有兴趣的朋友可以看一下。Leeo觉得SWFUpload稍微不足的就是界面的定制，总感觉自己定制出来的界面有点难登大雅之堂。下面Leeo为大家介绍一下，如何使用FlashFileUpload这个Flash组件来实现多文件上传，并且通过java程序自动生成缩略图和添加水印，FlashFileUpload定制出来的界面还是挺漂亮的（PS：这个界面是Leeo从 UUShare上弄下来的，^_^），先来Show一张效果图：


      从上面的图片从可以看出中间有个水印（PS：本博客的Logo），这并不是用Photoshop之类的软件弄上去的，而是通过下面将要讲到的java程序自动添加的，效果很不错，(*^__^*) 嘻嘻……好，正式开始吧…

      第一步：当然是获取flashfileupload.swf这个Flash组件啦，大家可以从这里下载 ，或者其他什么途径得到都行

      第二步：编写上传页面的代码如下：



<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>


<%


  String uploadType = (String)request.getParameter("uploadType"

);
  Long filmid = Long.parseLong((String)request.getParameter("filmid"

));
  //out.print(uploadType);


  //out.print(filmid);


%>


<

object

id

="fileUpload"


    codebase

="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab#version=10,0,22,87"


    height

="310"

width

="500"

align

="middle"


    classid

="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"

>


    <

param

name

="_cx"

value

="13229"

/>


    <

param

name

="_cy"

value

="8202"

/>


    <%


        if

("Video"

.equals(uploadType)){
    %>


    <

param

name

="flashvars"

value

="fileTypeDescription=允许视频格式&fileTypes=*.asx;*.asf;*.mpg;*.wmv;*.3gp;*.mp4;*.mov;*.avi;*.flv;*.wmv9;*.rm;*.rmvb&completeFunction=UploadComplete()&fileSizeLimit=3000000&totalUploadSize=10240000&accounttype=0&uploadPage=flashupload!Upload.action;jsessionid=${session.id}?uploadType=<%=uploadType %>-<%=filmid %>"

/>


    <%


        }else

{
    %>


    <

param

name

="flashvars"

value

="fileTypeDescription=JPG格式图片&fileTypes=*.jpg;*.jpeg&completeFunction=UploadComplete()&fileSizeLimit=3000000&totalUploadSize=10240000&accounttype=0&uploadPage=flashupload!Upload.action;jsessionid=${session.id}?uploadType=<%=uploadType %>-<%=filmid %>"

/>


    <%


        }
    %>


    <

param

name

="movie"

value

="flashfileupload.swf?ver=20090520"

/>


    <

param

name

="src"

value

="flashfileupload.swf?ver=20090520"

/>


    <

param

name

="wmode"

value

="transparent"

/>


    <

param

name

="play"

value

="0"

/>


    <

param

name

="loop"

value

="-1"

/>


    <

param

name

="quality"

value

="high"

/>


    <

param

name

="salign"

value

="lt"

/>


    <

param

name

="menu"

value

="-1"

/>


    <

param

name

="base"

value

=""

/>


    <

param

name

="allowscriptaccess"

value

="sameDomain"

/>


    <

param

name

="scale"

value

="noscale"

/>


    <

param

name

="devicefont"

value

="0"

/>


    <

param

name

="embedmovie"

value

="0"

/>


    <

param

name

="bgcolor"

value

=""

/>


    <

param

name

="swremote"

value

=""

/>


    <

param

name

="moviedata"

value

=""

/>


    <

param

name

="seamlesstabbing"

value

="1"

/>


    <

param

name

="profile"

value

="0"

/>


    <

param

name

="profileaddress"

value

=""

/>


    <

param

name

="profileport"

value

="0"

/>


    <

param

name

="allownetworking"

value

="all"

/>


    <

param

name

="allowfullscreen"

value

="true"

/>


    <%


        if

("Video"

.equals(uploadType)){
    %>


    <

embed

src

="flashfileupload.swf?ver=20090520"


        flashvars

="fileTypeDescription=允许视频格式&fileTypes=*.asx;*.asf;*.mpg;*.wmv;*.3gp;*.mp4;*.mov;*.avi;*.flv;*.wmv9;*.rm;*.rmvb&completeFunction=UploadComplete()&fileSizeLimit=3000000&totalUploadSize=10240000&accounttype=0&uploadPage=flashupload!Upload.action;jsessionid=${session.id}?uploadType=<%=uploadType %>-<%=filmid %>"


        quality

="high"


        wmode

="transparent"


        width

="500"


        height

="310"


        name

="fileUpload"


        align

="middle"


        allowscriptaccess

="samedomain"


        type

="application/x-shockwave-flash"


        pluginspage

="http://www.macromedia.com/go/getflashplayer"

>


    </

embed

>


    <%


        }else

{
    %>


    <

embed

src

="flashfileupload.swf?ver=20090520"


        flashvars

="fileTypeDescription=JPG格式图片&fileTypes=*.jpg;*.jpeg&completeFunction=UploadComplete()&fileSizeLimit=3000000&totalUploadSize=10240000&accounttype=0&uploadPage=flashupload!Upload.action;jsessionid=${session.id}?uploadType=<%=uploadType %>-<%=filmid %>"


        quality

="high"


        wmode

="transparent"


        width

="500"


        height

="310"


        name

="fileUpload"


        align

="middle"


        allowscriptaccess

="samedomain"


        type

="application/x-shockwave-flash"


        pluginspage

="http://www.macromedia.com/go/getflashplayer"

>


    </

embed

>


    <%


        }
    %>


</

object

>




说明：其中主要的是flashvars 这个参数的设置（PS：Leeo本人对这里的设置也仅仅是略知一二）

fileTypeDescription：允许上传文件的类型描述

fileTypes：允许上传的文件类型

completeFunction：上传完成后调用的js函数

fileSizeLimit：文件大小限制

totalUploadSize：一次性上传文件总大小限制

accounttype：这个没搞清楚怎么用，如果哪位知道的请告知一声，谢谢…

uploadPage：上传文件的请求路径，跟在它后面的是一些用户附加的数据。其中网上有网友说可以;jsessionid=的形式传递 session，Leeo没有做测试。?uploadType=是程序中需要的一些附加数据，这里本来需要两个变量的，之所以把它写到一个变量里，然后用 “-”隔开两个变量值，就像代码中的<%=uploadType %>-<%=filmid %>，是因为我们知道通常通过url传参是用“&”号隔开的，但这里却不能这么做，因为整个flashvars 就是用“&”来隔开不同参数的，如果附加的数据也用“&”隔开就会被截断，得不到我们想要的数据，所以这里用一种比较马虎的解决方法，利用 “-”号把不同变量值连接起来，然后在服务器端的java代码中用split("-")再把它们分割开来

    第三步：配置struts.xml文件，如下：

<

package

name

="ajaxfileupload"

namespace

="/"

extends

="ajaxfileupload-default"

>


<

action

name

="flashupload"

class

="leeo.action.FlashfileuploadAction"

>


<

result

name

="success"

type

="httpheader"

>


<

param

name

="status"

>

200</

param

>


</

result

>


</

action

>


</

package

>

特别说明： 这里还用到了ajax-file-upload-plugin- 0.4.0.jar（PS：Struts2中用ajxa方式上传文件需要的jar包）

      第四步：编写action类代码，如下：

/** 文件对象 */


private

transient

File[] Filedata;
/** 文件名 */


/** 文件对象 */


private

transient

File[] Filedata;
/** 文件名 */


private

transient

String[] FiledataFileName;
/** 文件内容类型 */


private

transient

String[] FiledataContentType;

/**
* 区分是上传海报、剧照、片花
* **/


private

transient

String uploadType;

public

String Upload() throws

Exception {
System.out.println("FiledataFileName length:

" + FiledataFileName.length);
System.out.println("uploadType:

" + uploadType);
String[] type_filmid = uploadType.split("-

");
System.out.println("filmid:

" + type_filmid[1]);

Film f = filmService.findFilmById(new

Long(type_filmid[1]));
//原文件存放路径 


String OriginalImageDirectory = ServletActionContext.getServletContext().getRealPath("/UploadFile/

" + type_filmid[0] + "/OriginalImage

") + System.getProperty("file.separator

", "\\

");
for

(int

i = 0; i < Filedata.length; i ++){
System.out.println("Filedata[

"+i+"]:

" + Filedata[i]);
System.out.println("FiledataFileName[

"+i+"]:

" + FiledataFileName[i]);
System.out.println("FiledataContentType[

"+i+"]:

" + FiledataContentType[i]);

        //在指定目录创建文件


        String newname = FileUpload.getFileName(FiledataFileName[i]);
        File bigFile = new

File(OriginalImageDirectory, newname);
        //把要上传的文件copy过去


        FileUpload.copy(Filedata[i], bigFile);

        if

(!"Video

".equals(type_filmid[0])){
        //缩略图存放路径


String ThumbnailsDirectory = ServletActionContext.getServletContext().getRealPath("/UploadFile/

" + type_filmid[0] + "/Thumbnails

") + System.getProperty("file.separator

", "\\

");
//生成缩略图


FileUpload.scaleImage(OriginalImageDirectory + newname, ThumbnailsDirectory + newname, 180, 200);
//设置数据库海报字段路径



String waterImgFile = ServletActionContext.getServletContext().getRealPath("/UploadFile

") + System.getProperty("file.separator

", "\\

");
        // 给大图添加文字水印 


        //FileUpload.watermark(bigFile); 


        // 给大图添加图片水印，可以是gif或png格式 


        FileUpload.imageWaterMark(bigFile, waterImgFile);
File smallFile = new

File(ThumbnailsDirectory, newname);
// 给大图添加文字水印 


        //FileUpload.watermark(smallFile); 


        // 给大图添加图片水印，可以是gif或png格式 


        FileUpload.imageWaterMark(smallFile, waterImgFile);
        }

        /*
         * 操作数据库部分
         * */


        if

("Poster

".equals(type_filmid[0])){
        f.setFPoster(newname);
        filmService.modFilm(f);
        }else

if

("Still

".equals(type_filmid[0])){
        FilmStill fs = new

FilmStill();
        fs.setFsPath(newname);
        fs.setFilm(f);
        filmService.addFilmStill(fs);
        }else

if

("Video

".equals(type_filmid[0])){
        FilmVideo fv = new

FilmVideo();
        fv.setFvPath(newname);
        fv.setFilm(f);
        filmService.addFilmVideo(fv);
        }
}
return

SUCCESS;
}

public

File[] getFiledata() {
return

Filedata;
}

public

void

setFiledata(File[] filedata) {
this

.Filedata = filedata;
}

public

String[] getFiledataFileName() {
return

FiledataFileName;
}

public

void

setFiledataFileName(String[] filedataFileName) {
this

.FiledataFileName = filedataFileName;
}

public

String[] getFiledataContentType() {
return

FiledataContentType;
}

public

void

setFiledataContentType(String[] filedataContentType) {
this

.FiledataContentType = filedataContentType;
}

public

String getUploadType() {
return

uploadType;
}

public

void

setUploadType(String uploadType) {
this

.uploadType = uploadType;
}其中，操作数据库部分的代码跟这个例子无关，可以省去。

      第五步：要用到的其他类的代码（PS：这部分代码来自互联网）

      1：FileUpload.java用于生成缩略图、添加水印、生成无重复的文件名

import

java.awt.AlphaComposite;
import

java.awt.Color;
import

java.awt.Font;
import

java.awt.Graphics2D;
import

java.awt.Image;
import

java.awt.image.BufferedImage;
import

java.io.BufferedInputStream;
import

java.io.BufferedOutputStream;
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.text.SimpleDateFormat;
import

java.util.Date;

import

javax.imageio.ImageIO;

import

com.sun.image.codec.jpeg.JPEGCodec;
import

com.sun.image.codec.jpeg.JPEGImageEncoder;

public

class

FileUpload {

private

static

final

int

BUFFER_SIZE = 16 * 1024;
private

static

final

String WATER_TEXT = "文字水印

";
private

static

final

String WATER_IMG_NAME = "logo.png

";

/*生成无重复文件名*/


    public

static

String getFileName(String name){

SimpleDateFormat df =new

SimpleDateFormat("yyyyMMddHHmmss

");
Date date = new

Date();
String filename=null

;
if

(!"".equals(name) && name != null

){
filename=df.format(date) + RandomNum.random2() + name.substring(name.lastIndexOf(".

"), name.length());
}
System.out.println("filename is:

"+filename);
return

filename;
}

    /*上传文件*/


public

static

void

copy(File src, File dst) {
        try

{
            InputStream in = null

;
            OutputStream out = null

;
            try

{
                in = new

BufferedInputStream(new

FileInputStream(src), BUFFER_SIZE);
                out = new

BufferedOutputStream(new

FileOutputStream(dst), BUFFER_SIZE);
                byte

[] buffer = new

byte

[BUFFER_SIZE];
                while

(in.read(buffer) > 0) {
                    out.write(buffer);
                }
            } finally

{
                if

(null

!= in) {
                    in.close();
                }
                if

(null

!= out) {
                    out.close();
                }
            }
        } catch

(Exception e) {
            e.printStackTrace();
        }
    }

/*生成缩略图*/


public

static

String scaleImage(String fromFileStr, String saveToFileStr, int

formatWideth, int

formatHeight) throws

Exception {
ScaleImage is = new

ScaleImage();
try

{
is.saveImageAsJpg(fromFileStr, saveToFileStr, formatWideth, formatHeight);
        }catch

(Exception e) {
            // TODO Auto-generated catch block


            e.printStackTrace();
            return

"error

";
        }
        return

"ok

";
}

/**
     * 添加文字水印
     *
     * @return
     * @throws Exception
     * @throws Exception
     */


    public

static

void

watermark(File img) throws

Exception {
        System.out.println("[watermark file name]--

" + img.getPath());
        try

{ 

            if

(!img.exists()) {
                throw

new

IllegalArgumentException("file not found!

");
            } 

            System.out.println("[watermark][img]--

" + img); 

            // 创建一个FileInputStream对象从源图片获取数据流 


            FileInputStream sFile = new

FileInputStream(img); 

            // 创建一个Image对象并以源图片数据流填充 


            Image src = ImageIO.read(sFile); 

            // 得到源图宽 


            int

width = src.getWidth(null

);
            // 得到源图长 


            int

height = src.getHeight(null

); 

            // 创建一个BufferedImage来作为图像操作容器 


            BufferedImage image = new

BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            // 创建一个绘图环境来进行绘制图象 


            Graphics2D g = image.createGraphics();
            // 将原图像数据流载入这个BufferedImage 


            System.out.println("width:

" + width + " height:

" + height);
            g.drawImage(src, 0, 0, width, height, null

);
            // 设定文本字体 


            g.setFont(new

Font("宋体

", Font.BOLD, 28));
            String rand = WATER_TEXT;
            // 设定文本颜色 


            g.setColor(Color.blue);
            // 设置透明度 


            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));
            // 向BufferedImage写入文本字符,水印在图片上的坐标 


            g.drawString(rand, width - (width - 20), height - (height - 60));
            // 使更改生效 


            g.dispose();
            // 创建输出文件流 


            FileOutputStream outi = new

FileOutputStream(img);
            // 创建JPEG编码对象 


            JPEGImageEncoder encodera = JPEGCodec.createJPEGEncoder(outi);
            // 对这个BufferedImage (image)进行JPEG编码 


            encodera.encode(image);
            // 关闭输出文件流 


            outi.close();
            sFile.close(); 

        } catch

(IOException e) {
            e.printStackTrace();
            throw

new

Exception(e);
        }
    } 

    /**
     * 添加图片水印
     *
     */


    public

static

void

imageWaterMark(File imgFile, String waterFilePath) throws

Exception {
        try

{
            // 目标文件 


            Image src = ImageIO.read(imgFile);
            int

wideth = src.getWidth(null

);
            int

height = src.getHeight(null

);
            BufferedImage image = new

BufferedImage(wideth, height, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(src, 0, 0, wideth, height, null

); 

            // 水印文件 路径 


            String waterImgPath = waterFilePath + WATER_IMG_NAME;
            System.out.println("waterImgPath--

" + waterImgPath);
            File waterFile = new

File(waterImgPath);
            Image waterImg = ImageIO.read(waterFile); 

            int

w_wideth = waterImg.getWidth(null

);
            int

w_height = waterImg.getHeight(null

);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));
            g.drawImage(waterImg, (wideth - w_wideth) / 2, (height - w_height) / 2, w_wideth, w_height, null

);
            // 水印文件结束 



            g.dispose();
            FileOutputStream out = new

FileOutputStream(imgFile);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(image);
            out.close();
        } catch

(Exception e) {
            e.printStackTrace();
        }
    }
}      2：RandomNum.java用于生成无重复随机数

import

java.util.Random;

public

class

RandomNum {

public

static

int

[] random1() {
Random r = new

Random();
int

temp1, temp2;
int

send[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 };
int

len = send.length;
int

returnValue[] = new

int

[22];
for

(int

i = 0; i < 22; i++) {
temp1 = Math.abs(r.nextInt()) % len;
returnValue[i] = send[temp1];
temp2 = send[temp1];
send[temp1] = send[len - 1];
send[len - 1] = temp2;
len--;
}
return

returnValue;
}
public

static

int

[] random2() {
int

send[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 };
int

temp1, temp2, temp3;
Random r = new

Random();
for

(int

i = 0; i < send.length; i++){// 随机交换send.length次


temp1 = Math.abs(r.nextInt()) % (send.length - 1); // 随机产生一个位置


temp2 = Math.abs(r.nextInt()) % (send.length - 1); // 随机产生另一个位置


if

(temp1 != temp2) {
temp3 = send[temp1];
send[temp1] = send[temp2];
send[temp2] = temp3;
}
}
return

send;
}
}      到此，本应用实例的代码就完成了，赶紧体验一下吧。。。




來源：http://itlife365.com/?post=216