Struts處理文件上傳

	// 文件上傳需要的三個屬性:
	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 {
		// 將提交的數據添加到數據庫中.
		product.setPdate(new Date());
		// product.setImage(image);
		if(upload != null){
			// 將商品圖片上傳到服務器上.
			// 獲得上傳圖片的服務器端路徑.
			String path = ServletActionContext.getServletContext().getRealPath(
					"/products");
			// 創建文件類型對象:
			File diskFile = new File(path + "//" + uploadFileName);
			// 文件上傳:
			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 {
		// 將信息修改到數據庫
		product.setPdate(new Date());
		
		// 上傳:
		if(upload != null ){
			String delPath = ServletActionContext.getServletContext().getRealPath(
					"/" + product.getImage());
			File file = new File(delPath);
			file.delete();
			// 獲得上傳圖片的服務器端路徑.
			String path = ServletActionContext.getServletContext().getRealPath(
					"/products");
			// 創建文件類型對象:
			File diskFile = new File(path + "//" + uploadFileName);
			// 文件上傳:
			FileUtils.copyFile(upload, diskFile);

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