本文主要是介绍081102 struts2 + swfupload 批量上传图片，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
upload.jsp：在这个文件里，使用了新swfload的上传方式，将文件流发送到struts2的doMultipleUploadUsingList.action，uploadStart的这个function，是将页面上的"id"元素的值一起带过去，上传过程中，会在divStatus的DIV中显示上传进度条。
<%@ page contentType="text/html; charset=utf-8"%>
<html>
<head>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<link href="<%=request.getContextPath() %>/admin/uploadpic/js/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="<%=request.getContextPath() %>/admin/uploadpic/js/swfupload.js"></script>
<script type="text/javascript" src="<%=request.getContextPath() %>/admin/uploadpic/js/handlers.js"></script>
<script type="text/javascript" src="<%=request.getContextPath() %>/admin/uploadpic/js/fileprogress.js"></script>
<script type="text/javascript" src="<%=request.getContextPath() %>/admin/uploadpic/js/swfupload.queue.js"></script>
<script type="text/javascript">
var swfu;
window.onload = function () {
var settings = {
// Backend Settings
file_post_name : "upload",
upload_url: "<%=request.getContextPath() %>/admin/product/doMultipleUploadUsingList.action", // Relative to the SWF file
post_params: {"product1": "1"},
use_query_string:false,
// File Upload Settings
file_size_limit : "100 MB",
file_types : "*.*",
file_types_description : "All Files",
file_upload_limit : 100,
file_queue_limit : 0,
custom_settings : {
progressTarget : "fsUploadProgress",
cancelButtonId : "btnCancel"
},
debug: false,
// The event handler functions are defined in handlers.js
file_queued_handler : fileQueued,
file_queue_error_handler : fileQueueError,
file_dialog_complete_handler : fileDialogComplete,
upload_start_handler : uploadStart,
upload_progress_handler : uploadProgress,
upload_error_handler : uploadError,
upload_success_handler : uploadSuccess,
upload_complete_handler : uploadComplete,
queue_complete_handler : queueComplete,
// Flash Settings
flash_url : "<%=request.getContextPath() %>/admin/uploadpic/js/swfupload_f8.swf" // Relative to this file
};
swfu = new SWFUpload(settings);
}
function uploadStart(file) {
document.getElementById("back").innerHTML='';
var post_params = this.settings.post_params;
post_params.id = document.getElementById("id").value;
this.setPostParams(post_params);
return true;
}
<style type="text/css">
#content button,input,span{
margin: 5 5 5 5;
}
#back{
width:810;
height:500;
float:left;
text-align:center;
vertical-align:middle;
overflow:auto;
}
#img2{
float:left;
margin: 1 1 1 1;
text-align:center;
vertical-align:middle;
display: table-cell;
display: block;
font-size: 68px;
width:78;
height:78;
border: 1px solid #B10000;
}
#img2 img{
vertical-align:middle;
cursor: pointer;
}
#img2 img hover{
cursor: pointer;
}
</style>
</head>
<div id="SWFUploadTarget" >
<body>
<div id="content">
<span>1、Product ID</span><input type="text" name="id" id="id" value= <%=request.getParameter("id") %> readonly>
<button id="btnBrowse" type="button" style="padding: 6px;" onClick="swfu.selectFiles(); this.blur();javascript:document.getElementById('divStatus').innerHTML='';">
</div>
</div>
<p>
<fieldset class="flash" id="fsUploadProgress">
<legend>Upload Progress</legend>
</fieldset>
<div id="divStatus"></div>
<div>
<input id="btnCancel" type="button" value="Cancel All Upload" onClick="swfu.cancelQueue();" disabled="disabled" style="font-size: 8pt;" />
</div>
<div id="back"></div>
</body>
<html>
MultipleFileUploadUsingListAction是一个可以通用的struts2 action，可以接收批量或单个上传过来的图片。并且可以选择生成相应压缩图。图片生成的命名方式是从xxx_01、xxx_02、xxx_03一直自动排列下去。压缩图为xxx_01_70
package com..web.action;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.web.commons.util.DirList;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
@SuppressWarnings("serial")
public class MultipleFileUploadUsingListAction extends ActionSupport {
private String id;
private File[] uploads;
private String[] uploadFileNames;
private String[] uploadContentTypes;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public File[] getUpload() { return this.uploads; }
public void setUpload(File[] upload) { this.uploads = upload; }
public String[] getUploadFileName() { return this.uploadFileNames; }
public void setUploadFileName(String[] uploadFileName) { this.uploadFileNames = uploadFileName; }
public String[] getUploadContentType() { return this.uploadContentTypes; }
public void setUploadContentType(String[] uploadContentType) { this.uploadContentTypes = uploadContentType; }
public String upload() throws Exception{
try{
String productname=id;
String url = ServletActionContext.getServletContext().getRealPath("Personalizedphoto")+"\\"+id+"\\";
for (int i=0;i<uploads.length;i++) {
FileInputStream fis=new FileInputStream(uploads[i]);
if(!(new File(url).isDirectory()))
{
new File(url).mkdir();
}
int temp=1,temp2=1;
String myFileName = productname+"_0"+temp;
DirList dirlist = new DirList();
String[] dir =dirlist.list(url);
for(int j=0;j<dir.length;j++){
String[] split = dir[j].split("\\.");
if(split[1].equals("jpg")&&split[0].split("\\_").length==3){
String[] split2=split[0].split("\\_");
if(Integer.parseInt(split2[1])>0&Integer.parseInt(split2[1])>=temp2){
temp2=Integer.parseInt(split2[1])+1;
}
if(Integer.parseInt(split2[1])==0){
temp2=1;
}
}
}
if(temp2<10){
myFileName = productname+"_0"+temp2;
}else{
myFileName = productname+"_"+temp2;
}
FileOutputStream fos=new FileOutputStream(url+myFileName+"_800.jpg");
byte[] buffer=new byte[1024];
int len=0;
while((len=fis.read(buffer))>0){
fos.write(buffer, 0, len);
}
java.io.File file = new java.io.File(url+myFileName+"_800.jpg");
String newurl=url+myFileName+"_70.jpg";
java.awt.Image src = javax.imageio.ImageIO.read(new java.io.File(url+myFileName+"_800.jpg"));
float tagsize=70;
int old_w=src.getWidth(null);
int old_h=src.getHeight(null);
int new_w=0;
int new_h=0;
float tempdouble;
if(old_w>old_h){
tempdouble=old_w/tagsize;
}else{
tempdouble=old_h/tagsize;
}
new_w=Math.round(old_w/tempdouble);
new_h=Math.round(old_h/tempdouble); java.awt.image.BufferedImage tag = new java.awt.image.BufferedImage(new_w,new_h,java.awt.image.BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);
FileOutputStream newimage=new FileOutputStream(newurl);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage);
encoder.encode(tag);
newurl=url+myFileName+"_130.jpg";
tagsize=130;
if(old_w>old_h){
tempdouble=old_w/tagsize;
}else{
tempdouble=old_h/tagsize;
}
new_w=Math.round(old_w/tempdouble);
new_h=Math.round(old_h/tempdouble);
tag = new java.awt.image.BufferedImage(new_w,new_h,java.awt.image.BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);
newimage=new FileOutputStream(newurl);
encoder = JPEGCodec.createJPEGEncoder(newimage);
encoder.encode(tag);
newurl=url+myFileName+"_180.jpg";
tagsize=180;
if(old_w>old_h){
tempdouble=old_w/tagsize;
}else{
tempdouble=old_h/tagsize;
}
new_w=Math.round(old_w/tempdouble);
new_h=Math.round(old_h/tempdouble);
tag = new java.awt.image.BufferedImage(new_w,new_h,java.awt.image.BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);
newimage=new FileOutputStream(newurl);
encoder = JPEGCodec.createJPEGEncoder(newimage);
encoder.encode(tag);
newurl=url+myFileName+"_500.jpg";
tagsize=500;
if(old_w>old_h){
tempdouble=old_w/tagsize;
}else{
tempdouble=old_h/tagsize;
}
new_w=Math.round(old_w/tempdouble);
new_h=Math.round(old_h/tempdouble);
tag = new java.awt.image.BufferedImage(new_w,new_h,java.awt.image.BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);
newimage=new FileOutputStream(newurl);
encoder = JPEGCodec.createJPEGEncoder(newimage);
encoder.encode(tag);
newimage.close();
}
}catch(Exception e){}
this.setId(id);
return SUCCESS;
}
}
这个action还调用了一个类DirList ，是用于扫描当前文件夹里的图片，并且根据当前的命名情况来命名新上传的图片，如原来已经有了10张，那上传之后的就从第11开始命名。
import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.regex.Pattern;
public class DirList {
public String[] list(String thepath) {
File path = new File(thepath);
String[] list;
list = path.list();
Arrays.sort(list, new AlphabeticComparator());
return list;
}
private void deleteFile(File file){
if(file.exists()){
if(file.isFile()){
file.delete();
}else if(file.isDirectory()){
File files[] = file.listFiles();
for(int i=0;i<files.length;i++){
this.deleteFile(files[i]);
}
}
file.delete();
}else{
}
}
}
class DirFilter implements FilenameFilter {
private Pattern pattern; public DirFilter(String regex) {
pattern = Pattern.compile(regex); }
public boolean accept(File dir, String name) {
// Strip path information, search for regex:
return pattern.matcher(new File(name).getName()).matches();
}
}
class AlphabeticComparator implements Comparator {
public int compare(Object o1, Object o2) {
String s1 = (String) o1; String s2 = (String) o2;
return s1.toLowerCase().compareTo(s2.toLowerCase());
}
}
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