JAVA文件上传

导入jspSmartUpload.jar包

servlet代码

package product;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.jspsmart.upload.File;
import com.jspsmart.upload.Files;
import com.jspsmart.upload.Request;
import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;

import dao.ProductDao;
import pojo.Product;

@WebServlet("/manager/admin_doproductadd")
public class DoProductAdd extends HttpServlet {        
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //创建smartupload对象
        SmartUpload su = new SmartUpload();
        //初始化
        su.initialize(this.getServletConfig(), request, response);
        //上传过程
        try {
            su.upload();
        } catch (SmartUploadException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        //获取上传的文件对象
        Files fs = su.getFiles();
        File f = fs.getFile(0);//由于只上传了一个，所以直接获取0号元素
        String fname = f.getFilePathName();//xx.jpg
        try {
            //此处由于是上传到发布路径下，所以开发路径下没有该图片,项目目录下有图片
            su.save("/images/product");
        } catch (SmartUploadException e) {          
            e.printStackTrace();
        }
        //原来的request获取不到原来表单的参数，需要SmartUpload对象的request获取表单中的参数
        Request req1 = su.getRequest();
        String productname =  req1.getParameter("pruductname"); 
        String picture =  req1.getParameter("picture");
        String price =  req1.getParameter("price");
        String desc =  req1.getParameter("desc");
        String stock =  req1.getParameter("stock");
        Product p = new Product();
        p.setProduct_filename(productname);
        p.setProduct_describe(desc);
        p.setProduct_filename(fname);
        p.setProduct_price(Double.parseDouble(price));
        p.setProduct_stock(Integer.parseInt(stock));    
        p.setProduct_name(productname);
        int flag = ProductDao.insert(p);
        if(flag>0) {
            response.sendRedirect("admin_doproductselect");
        }else {
            PrintWriter out = response.getWriter();
            out.print("<script>");
            out.print("alert('增加失败');");
            out.print("location.href='admin_toproductadd';");
            out.print("</script>");
        }

    }

}

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HTML

 <form action="/shopproject/manager/admin_doproductadd" enctype="multipart/form-data" method="post"  name="myform">
<table>
    <tr>
          <td>图书名字：<input class="common-text required" id="" name="pruductname" size="50" value="" type="text">
            </td>
    </tr> 
    <tr>
    <td>图书图片：<input class="common-text required" id="" name="picture" size="50" value="" type="file">
         </td>
     </tr> 
     <tr>
          <td> 图书价格： <input class="common-text required" id="" name="price" size="50" value="" type="text">
         </td>
     </tr> 
     <tr>

           <td> 图书描述：<input class="common-text required" id="" name="desc" size="120" value="" type="text">
              </td>
      </tr> 
     <tr>
          <td> 图书库存：<input class="common-text required" id="" name="stock" size="50" value="" type="text">
            </td>
      </tr> 
</form>

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总结:
   需要导入jspSmartUpload.jar
   表单form加上属性enctype="multipart/form-data"，提交方式为post
   需要用SmartUpload重新获取request对象才能获取表单对应的内容