在Struts 2中实现文件上传

import java.io.OutputStream;
import java.util.Date;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class FileUploadAction extends ActionSupport {
    private static final long serialVersionUID = 572146812454l ;
    private static final int BUFFER_SIZE = 16 * 1024 ;
   
    private File myFile;
    private String contentType;
    private String fileName;
    private String imageFileName;
    private String caption;