Java Code:

package com.shop.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;
import com.shop.uitl.FileUitl;
import com.shop.uitl.ServerUrl;

public class FileUpload extends ActionSupport {

	private File file; // 上传的文件
	private String fileFileName; // 文件名称
	private String fileContentType; // 文件类型
	private String path; // 返回路径
	private boolean status; // 状态
	private String message; // 提示信息
	private String url;		//返回的url调用路径
	
	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}

	public void setFile(File file) {
		this.file = file;
	}

	public void setFileFileName(String fileFileName) {
		this.fileFileName = fileFileName;
	}

	public String getFileFileName() {
		return fileFileName;
	}

	public String getFileContentType() {
		return fileContentType;
	}

	public void setFileContentType(String fileContentType) {
		this.fileContentType = fileContentType;
	}

	public String getPath() {
		return path;
	}

	public void setPath(String path) {
		this.path = path;
	}

	public boolean isStatus() {
		return status;
	}

	public void setStatus(boolean status) {
		this.status = status;
	}

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	@Override
	public String execute() throws Exception {
		// TODO Auto-generated method stub

		HttpServletRequest request=ServletActionContext.getRequest();
		String path = ServerUrl.getServerPath(request, "upload");
		String save=ServerUrl.getDiskPath(request, "upload");
		
		if (file == null) {
			this.setMessage("文件为空！");
			status = false;
			return SUCCESS;
		}
	try{
		//创建目录 按照当天的日期来创建
		Date date=new Date();
		SimpleDateFormat format=new SimpleDateFormat("yyyyMMdd");
		SimpleDateFormat format2=new SimpleDateFormat("yyyyMMddhhmmss");
		String strDate=format.format(date);
		//检查文件夹是否存在
		if(!new File(save+strDate).isDirectory()){
			new File(save+strDate).mkdir();
		}
		//重命名文件
		
		String name=FileUitl.getExtensionName(fileFileName);
		fileFileName=format2.format(date)+name;
		
		//写入到磁盘
		FileInputStream in=new FileInputStream(file);
		File outFile=new File(save+strDate+"\\"+fileFileName);
		FileOutputStream out=new FileOutputStream(outFile);
		//文件损坏
		int ch=0;
		while((ch=in.read())!=-1){
			out.write(ch);
		}
		out.flush();
		out.close();
		in.close();
		
		setMessage("文件上传成功！");				//响应信息
		setPath("upload/"+strDate+"/"+fileFileName);//相对路径
		setStatus(true);							//状态
		setUrl(ServerUrl.getServerPath(request, "upload/"+strDate+"/"+fileFileName));								//绝对路径
		
		System.out.println(fileContentType + "已经接受到数据！");
		return SUCCESS;
	}catch (Exception e) {
		setStatus(false);
		setMessage("上传过程中发送了异常，上传失败！");
	}
	
	return SUCCESS;
	}

}