upload&&download

package am.demo; 
import java.io.File; 
import java.io.IOException; 
import java.util.Iterator; 
import java.util.List; 
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; 
@SuppressWarnings("serial") 
public class Upload extends HttpServlet { 
    private String uploadPath = "d://temp"; // 上传文件的目录 
    @SuppressWarnings("unchecked") 
    public void doPost(HttpServletRequest request, HttpServletResponse response) 
            throws IOException, ServletException { 
        try { 
            // Create a factory for disk-based file items 
            DiskFileItemFactory factory = new DiskFileItemFactory(); 
            // Create a new file upload handler 
            ServletFileUpload upload = new ServletFileUpload(factory); 
            List<FileItem> items = upload.parseRequest(request);// 得到所有的文件 
            Iterator<FileItem> i = items.iterator();
            while (i.hasNext()) { 
                FileItem fi = (FileItem) i.next();
                String fileName = fi.getName();
                if (fileName != null) { 
                    File fullFile = new File(fi.getName()); 
                    File savedFile = new File(uploadPath, fullFile.getName()); 
                    fi.write(savedFile);
                }
            }
            response.setContentType("text/html;charset=GBK");   
            response.getWriter().print(
            "<mce:script language='javascript'><!-- 
alert('上传成功');window.location.href='index.jsp'; 
// --></mce:script>"); 
        } catch (Exception e) { 
            // 可以跳转出错页面 
            e.printStackTrace();
        }
    }
    public void init() throws ServletException { 
        File uploadFile = new File(uploadPath); 
        if (!uploadFile.exists()) { 
            uploadFile.mkdirs();
        }
    }
}

package am.demo; 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.IOException; 
import java.io.OutputStream; 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
@SuppressWarnings("serial") 
public class Download extends HttpServlet { 
    public void doGet(HttpServletRequest request, HttpServletResponse response) 
            throws IOException, ServletException { 
        String aFileName = new String(request.getParameter("name").getBytes( 
                "iso8859-1"), "gbk"); 
        File fileLoad = new File("d:/temp", aFileName); 
        FileInputStream in = null; // 输入流 
        OutputStream out = response.getOutputStream();
        byte b[] = new byte[1024]; 
        try { 
             response.setContentType("application/x-msdownload;"); 
            response.setHeader("Content-disposition", "attachment; filename=" 
                    + new String(aFileName.getBytes("GBK"), "ISO-8859-1")); 
            // download the file. 
            in = new FileInputStream(fileLoad); 
            int n = 0; 
            while ((n = in.read(b)) != -1) { 
                out.write(b, 0, n); 
            }
        } catch (Throwable e) { 
            e.printStackTrace();
        } finally { 
            try { 
                in.close();
                out.close();
            } catch (Throwable e) { 
                e.printStackTrace();
            }
        }
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response) 
            throws IOException, ServletException { 
        doGet(request, response);
    }
}

package am.demo; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
@SuppressWarnings("serial") 
public class Delete extends HttpServlet { 
    public void doGet(HttpServletRequest request, HttpServletResponse response) 
            throws FileNotFoundException, IOException { 
        String aFileName = new String(request.getParameter("name").getBytes( 
                "iso8859-1"), "gbk"); 
        File file = new File("d:/temp", aFileName); 
        response.setContentType("text/html;charset=GBK"); 
        if (!file.isDirectory()) { 
            file.delete();
            response.getWriter().print(
                "<mce:script language='javascript'><!-- 
alert('删除成功');window.location.href='index.jsp'; 
// --></mce:script>"); 
        } else { 
        }
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response) 
            throws IOException, ServletException { 
        doGet(request, response);
    }
}