struts2.0文件的上传一个实例

package com.sun.action; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.Date; import java.util.List; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class MoreFileUploadAction extends ActionSupport{ /** * */ private static final long serialVersionUID = -6096327807183421604L; private List < File > upload = new ArrayList < File > (); private List < String > uploadFileName = new ArrayList < String > (); private List < String > uploadContentType = new ArrayList < String > (); private static final int BUFFER_SIZE=16*1024; private String imageFileName=new String(); List<String> image=new ArrayList<String>(); public List < File > getUpload() { return this .upload; } public void setUpload(List < File > uploads) { this .upload = uploads; } public String getImageFileName() { return imageFileName; } public List < String > getUploadFileName() { return this .uploadFileName; } public void setUploadFileName(List < String > uploadFileName) { this .uploadFileName = uploadFileName; } public List < String > getUploadContentType() { return this .uploadContentType; } public void setUploadContentType(List < String > contentTypes) { this .uploadContentType = contentTypes; } private 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(); } } private static String getExtention(String fileName) { int pos = fileName.lastIndexOf( "." ); return fileName.substring(pos); } @Override public String execute() { for(int i=0;i<upload.size();i++) { imageFileName= new Date().getTime() + getExtention(uploadFileName.get(i)); File imageFile = new File(ServletActionContext.getServletContext().getRealPath( "/UploadImages" ) + "/" + imageFileName); image.add(imageFileName); copy(upload.get(0), imageFile); } return SUCCESS; } public List<String> getImage() { return image; } public void setImage(List<String> image) { this.image = image; } }