uploadaction.java

图片管理功能：图片的上载及下载

package action;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import org.apache.struts.upload.FormFile;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.servlet.ServletException;
import javax.imageio.ImageIO;
import java.io.*;
import java.awt.*;
import java.awt.image.BufferedImage;

import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;
import formbean.UploadForm;
import beans.UserBean;
import beans.DataBean;

/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2006-6-23
 * Time: 9:55:33
 * To change this template use File | Settings | File Templates.
 */
public class UploadAction extends Action {
    public ActionForward perform(ActionMapping mapping,
                                 ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response)
                    throws IOException, ServletException {

       request.setCharacterEncoding("GBK");
       response.setContentType("text/html;charset=gbk");
       UploadForm uploadForm = (UploadForm)form;
       FormFile pic =  uploadForm.getPic();
       String name = new String(uploadForm.getName().getBytes("ISO-8859-1")) ;
       String typecon =  new String(uploadForm.getPictype() .getBytes("ISO-8859-1") );
       String description =  new String(uploadForm.getDescription() .getBytes("ISO-8859-1") );
       if(!pic.equals("") && !name.equals("") && !typecon.equals("") && !description.equals("")){
       String picname = pic.getFileName();
        String fname=new String(picname.getBytes("ISO-8859-1"));
        String d = request.getRealPath("pictures");
        String uploadFileName = request.getRealPath("pictures")+"\\"+typecon+"\\"+fname;
        File upliadFile = new File(uploadFileName);
        BufferedInputStream bis = null;
        String filepos = "pictures"+"\\"+typecon+"\\"+fname;
       HttpSession session =request.getSession();
       UserBean ub =  (UserBean)session.getAttribute("usebean");
       String sql = "insert into pictures (name,type,pos,detail,typecon,usename,localpos) values ('"+name+"','"+pic.getContentType()+"','"+filepos+"','"+description+"','"+typecon+"','"+ub.getUsername() +"','"+uploadFileName+"') ";
       DataBean db = new DataBean();
                Image image = null;
                BufferedOutputStream bos = null;
                try{
                if(pic.getFileSize()<2*1024*1024){
                bis = new BufferedInputStream(pic.getInputStream());
                image = javax.imageio.ImageIO.read(bis);
                int width = image.getWidth(null);
                int height = image.getHeight(null);
                int w = 160;
                int h = 120;
                if(width>w||height>h){
                BufferedImage bi = new BufferedImage(w,h,
                                                     BufferedImage.TYPE_INT_RGB);
                bi.getGraphics().drawImage(image,0,0,w,h,null);
                bos = new BufferedOutputStream(new FileOutputStream(
               upliadFile));
                JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);
             encoder.encode(bi);               
                }else{
                bos = new BufferedOutputStream(new FileOutputStream(upliadFile));
                byte[] date = new byte[5*1024];
                int len = bis.read(date);
                while (len!=-1){
                    bos.write(date);
                    len = bis.read(date);
                }
                }
                }

                }catch(Exception e){
                e.printStackTrace();
            } finally {
                try {
                    if (bis != null)
                        bis.close();
                } catch (IOException e1) {

                    e1.printStackTrace();
                }
                try {
                    if (bos != null)
                        bos.close();
                } catch (IOException e2) {

                    e2.printStackTrace();
                }
            }

        try{
              db.insertObj(sql);
              return mapping.findForward("success");
        }catch(Exception e){
            e.getMessage() ;
        }
       }
           return mapping.findForward("error");
    }
}