jsp實現文件上傳

java代碼部分：

public ActionForward add(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		AddForm addForm = (AddForm) form;


		ActionErrors errors = new ActionErrors();
		try {
			// 獲得要上傳文件
			FormFile file = addForm.getFile();
			System.out.println(file.getContentType());
			if (!"image/pjpeg".equals(file.getContentType())) {
				errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
						"你選擇的文件類型有誤", false));
				this.addErrors(request, errors);
				return mapping.findForward("error");
			}
			// 獲得上傳文件名
			String filename = file.getFileName();


			// 獲得新的文件名稱
			String newfilename = DataDefine.getDateId() + "."
					+ filename.substring(filename.lastIndexOf("."));


			String imagespath = "images" + "/" + newfilename;


			// 獲得服務器上傳目錄
			String dir = this.getServlet().getServletContext().getRealPath(
					"images");


			// 獲得輸入流
			InputStream in = file.getInputStream();
			// 定義文件輸入流
			OutputStream fileout = new FileOutputStream(dir + File.separator
					+ newfilename);
			int c = 0;
			byte[] buffer = new byte[1024];
			while ((c = in.read(buffer, 0, 1024)) != -1) {


				fileout.write(buffer, 0, c);


			}
			file.destroy();


			// 數據庫記錄信息
			Product pro = new Product();
			pro.setProductname(addForm.getProductname());
			pro.setImagespath(imagespath);
			biz.saveProduct(pro);


		} catch (Exception e) {
			e.printStackTrace();
		}


		return null;
	}

jsp部分：

1.添加
<%@ page language="java" pageEncoding="utf-8"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%> 
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>
 
 
	
		
	
	
		
		
		產品名稱 : 

		產品的圖片：
	
			
		
		
	


2:顯示

    	
    	
    		${product.productname}