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

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补充：

Struts2Upload(全含jar包，将数据保存到数据库)

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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; }

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 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;       }

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