imageupload.java

整个系统采用MVC开发模式

package Manager;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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

public class ImageUpload extends HttpServlet {

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		  String name1=null;
		 try {

	            DiskFileItemFactory factory = new DiskFileItemFactory();



	            ServletFileUpload sevletFileUpload = new ServletFileUpload(factory);

	            // 设置允许用户上传文件大小,单位:字节，这里设为2m

	            sevletFileUpload.setSizeMax(2 * 1024 * 1024);

	            // 设置最多只允许在内存中存储的数据,单位:字节

	            factory.setSizeThreshold(4096);

	            // 设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录

	            factory.setRepository(new File("d:\\temp"));

	            // 开始读取上传信息 

	            List fileItems = sevletFileUpload.parseRequest(request);

	            // 依次处理每个上传的文件

	            Iterator iter = fileItems.iterator();



	            // 正则匹配，过滤路径取文件名

	            String regExp = ".+\\\\(.+)$";



	            // 过滤掉的文件类型

	            String[] errorType = { ".exe", ".com", ".cgi", ".asp" };

	            Pattern p = Pattern.compile(regExp);
	          
	            while (iter.hasNext()) {

	                 FileItem item = (FileItem) iter.next();

	                 // 忽略其他不是文件域的所有表单信息

	                 if (!item.isFormField()) {

	                    String name = item.getName();
	                   
	                   
	                     long size = item.getSize();

	                     if ((name == null || name.equals("")) && size == 0)

	                          continue;

	                     Matcher m = p.matcher(name);
	                     

	                     boolean result = m.find();

	                     if (result) {

	                          for (int temp = 0; temp < errorType.length; temp++) {

	                               if (m.group(1).endsWith(errorType[temp])) {

	                                   throw new IOException(name + ": 非法文件类型禁止上传");

	                               }

	                          }

	                          try {

	                               // 保存上传的文件到指定的目录

	                               // 在下文中上传文件至数据库时，将对这里改写开始

	                               item.write(new File("D:\\workspace\\gouwuche3\\WebRoot\\temp.files\\"+ m.group(1)));
	                               name1=m.group(1);


	                               out.print(name + "&nbsp;&nbsp;" + size + "<br>");

	                               // 在下文中上传文件至数据库时，将对这里改写结束

	                          } catch (Exception e) {

	                               out.println(e);

	                          }



	                     } else {

	                          throw new IOException("fail to upload");

	                     }

	                 }

	            }

	       } catch (IOException e) {

	            out.println(e);

	       } catch (FileUploadException e) {

	            out.println(e);

	       }

		//图片上传组建利用结束
	      System.out.println(name1);
	       String path="temp.files/".concat(name1); System.out.println(path);
	       response.sendRedirect("/gouwuche3/GoodsManage/GoodsAdd.jsp?url="+path+"");
	}
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
                 doPost(request,response);
		
	}

}