Struts处理文件上传

	// 文件上传需要的三个属性:
	private File upload;
	private String uploadFileName;
	@SuppressWarnings("unused")
	private String uploadContentType;

import org.apache.commons.io.FileUtils;

	// 保存商品的方法:
	public String save() throws IOException {
		// 将提交的数据添加到数据库中.
		product.setPdate(new Date());
		// product.setImage(image);
		if(upload != null){
			// 将商品图片上传到服务器上.
			// 获得上传图片的服务器端路径.
			String path = ServletActionContext.getServletContext().getRealPath(
					"/products");
			// 创建文件类型对象:
			File diskFile = new File(path + "//" + uploadFileName);
			// 文件上传:
			FileUtils.copyFile(upload, diskFile);
	
			product.setImage("products/" + uploadFileName);
		}
		productService.save(product);
		return "saveSuccess";
	}

	// 修改商品的方法
	public String update() throws IOException {
		// 将信息修改到数据库
		product.setPdate(new Date());
		
		// 上传:
		if(upload != null ){
			String delPath = ServletActionContext.getServletContext().getRealPath(
					"/" + product.getImage());
			File file = new File(delPath);
			file.delete();
			// 获得上传图片的服务器端路径.
			String path = ServletActionContext.getServletContext().getRealPath(
					"/products");
			// 创建文件类型对象:
			File diskFile = new File(path + "//" + uploadFileName);
			// 文件上传:
			FileUtils.copyFile(upload, diskFile);

			product.setImage("products/" + uploadFileName);
		}
		productService.update(product);
		// 页面跳转
		return "updateSuccess";
	}