个人总结：Struts2 上传文件的六种方法
Struts2 上传实例六种方法（去除了jar包，配置时必须导入包：
commons-fileupload-1.2.1.jar；commons-io-1.3.2.jar；commons-logging-1.0.4.jar；
freemarker-2.3.13.jar；ognl-2.6.11.jar；struts2-core-2.1.6.jar；xwork-2.1.2.jar
?
补充：
Struts2Upload(全含jar包，将数据保存到数据库)
?
压缩包部分代码如下（方法一、方法三）：
public String execute() throws Exception { InputStream is=new FileInputStream(filer); String root=ServletActionContext.getRequest().getRealPath("/upload"); File destFile=new File(root,this.getFileFileName()); OutputStream os=new FileOutputStream(destFile); byte[] buffer=new byte[400]; byte t; int length=0; while((length=is.read(buffer))>0) { os.write(buffer,0,length); } /*UploadService us=new UploadService(); int flag=us.insertUpload(filmName, filmContent,filer);*/ is.close(); os.close(); return SUCCESS; }?
private static void copy(File src, File dst) { 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]; int len = 0; while ((len = in.read(buffer)) > 0) { out.write(buffer, 0, len); } } catch (Exception e) { e.printStackTrace(); } finally { if (null != in) { try { in.close(); } catch (IOException e) { e.printStackTrace(); } } if (null != out) { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } } } @Override public String execute() throws Exception { //根据服务器的文件保存地址和原文件名创建目录文件全路径 String dstPath = ServletActionContext.getServletContext() .getRealPath("/upload") + "\" + uploadFileName; System.out.println("上传的文件的类型："+ this.getUploadContentType()); File dstFile = new File(dstPath); copy(this.upload, dstFile); return SUCCESS; }?本文系个人总结，能够实现功能，非网上搜索！！！