小弟请教个问题

您好我想问一下上传图片到服务器把图片地址信息保存到数据库点击刷新按钮怎么在把图片信息从数据库拿出来显示在后台的 grid中谢谢不胜感谢 --------------------编程问答-------------------- 你这边的刷新操作就相当于一次查询全部信息的操作，点击刷新按钮的时候，通过单击事件，在js中写一个连接后台的方法，在后台查询出所有的图片信息，生成一个list返回页面，然后再在页面上循环遍历出来 --------------------编程问答-------------------- 你可以用ajax异步请求刷新图片，就写在刷新按钮的方法里面。 --------------------编程问答-------------------- 写了但是最后一步数据库返回的值怎么跟grid联系一块老是出错 --------------------编程问答-------------------- 把表单中上传的图片保存在服务器把图片路径和填写的信息保存在数据库同时把图片信息传到后面页面的grid中是现在表单信息传到grid 还是传到数据库在从数据库拿数据到grid 这个问题纠结两天了
谢谢

--------------------编程问答-------------------- 你可以看一下有关验证码的相关东西
就是你要的那种
--------------------编程问答-------------------- 可以试试这个方法！

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import com.iprecare.entity.management.product.Product;
import com.iprecare.service.ProductsService;
import com.iprecare.serviceImpl.ProductsServiceImpl;
import com.iprecare.util.Commons;
import com.iprecare.util.GetNowTime;

public class AddProductServlet extends HttpServlet {
private String savePath="/images/product";
ServletContext sc;
private Map<String,String> parameters=new HashMap<String, String>();
private static final long serialVersionUID = 1L;

public void init(ServletConfig config)
{
   sc=config.getServletContext();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
   super.destroy(); // Just puts "destroy" string in log
   // Put your code here
}

/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        doPost(request, response);
        }

/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
File file = doAttachment(request);
String pic ="nopic.gif";
String poto=parameters.get("pic");
if(file ==null&&poto!=null){
   pic =poto;
}
if(file!=null){
   pic=file.toString();
}
PrintWriter out = response.getWriter();
String productName=parameters.get("productName");
float productMatkPrice=Float.parseFloat(parameters.get("productMatkPrice"));
float productMembPrice=Float.parseFloat(parameters.get("productMembPrice"));
String productType=parameters.get("productType");
String productDesc=parameters.get("productDesc");
//String productName=request.getParameter("productName");
//String aa=request.getParameter("productMatkPrice");
//float productMatkPrice=Float.parseFloat(aa);
//String bb=request.getParameter("productMembPrice");
//float productMembPrice=Float.parseFloat(bb);
//String productType=request.getParameter("productType");
//String productImg=request.getParameter("productImg");
//String productDesc=request.getParameter("productDesc");
//System.out.println("productImg="+productImg);
Product pd=new Product();
pd.setProductName(productName);
pd.setProductMatkPrice(productMatkPrice);
pd.setProductMembPrice(productMembPrice);
pd.setProductType(productType);
pd.setProductImg(pic);
pd.setProductDesc(productDesc);
ProductsService pds=new ProductsServiceImpl();
pds.AddProducts(pd);
//request.setAttribute("error", "<script language = javascript>alert('信息保存成功！');location.href='/iPreCare/management/products/addProducts.jsp'</script>");
//request.getRequestDispatcher("index.jsp").forward(request, response);
//return;
out.print(Commons.getJS("添加成功！", "/iPreCare/management/products/addProducts.jsp"));
}

public File doAttachment(HttpServletRequest request) throws ServletException, IOException {
   File file = null;
   String filename=null;
   DiskFileItemFactory factory = new DiskFileItemFactory();
   ServletFileUpload upload = new ServletFileUpload(factory);
   try {
    List items = upload.parseRequest(request);
    Iterator itr = items.iterator();
    while (itr.hasNext()) {
     FileItem item = (FileItem) itr.next();
     if (item.isFormField()) {
      parameters.put(item.getFieldName(), item.getString("UTF-8"));
     } else {
      if (item.getName() != null && !item.getName().equals("")) {
       File tempFile = new File(item.getName());
       filename = tempFile.getName();
        // String suffix=filename.substring(filename.lastIndexOf('.'));
            //filename=GetNowTime.getNewTime()+filename;
            System.out.println(filename +" "+filename);
            file = new File(sc.getRealPath("/") + savePath, filename);
            System.out.println("d="+sc.getRealPath("/"));
       item.write(file);
       file = new File(filename);
      }
     }
    }
   } catch (Exception e) {
    e.printStackTrace();
   }
   return file;
}
} --------------------编程问答-------------------- 大哥你写的doPost（）这个方法是干嘛的  图片上传到服务器  地址跟信息放到数据库也做好了我想问一下怎么把信息同时在放入grid 中 --------------------编程问答-------------------- 你写的doPost（）这个方法是干嘛的图片上传到服务器地址跟信息放到数据库也做好了我想问一下怎么把信息同时在放入grid 中 --------------------编程问答-------------------- 会用Ajax不，？用ajax试试 --------------------编程问答--------------------

补充：Java ,  Web 开发

小弟 请教个问题

小弟请教个问题