pack

创新互联建站公司2013年成立，先为弓长岭等服务建站，弓长岭等地企业，进行企业商务咨询服务。为弓长岭企业网站制作PC+手机+微官网三网同步一站式服务解决您的所有建站问题。age com.itheima.servlet; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; 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.FileUploadBase; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.FilenameUtils; import com.itheima.util.IdGenertor; public class UploadServlet3 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); //检测form是否是multipart/form-data类型的 boolean isMultipart = ServletFileUpload.isMultipartContent(request); if(!isMultipart){ throw new RuntimeException("The form's enctype attribute value must be multipart/form-data"); } //解析请求内容 DiskFileItemFactory factory = new DiskFileItemFactory();//产生FileItem的工厂 factory.setRepository(new File("d:/"));//指定临时文件的存放目录 ServletFileUpload sfu = new ServletFileUpload(factory); // sfu.setFileSizeMax(3*1024*1024);//单个文件大小限制 // sfu.setSizeMax(5*1024*1024);//总文件大小 List items = new ArrayList(); try { items = sfu.parseRequest(request); }catch(FileUploadBase.FileSizeLimitExceededException e) { response.getWriter().write("单个文件不能超过3M"); } catch(FileUploadBase.SizeLimitExceededException e) { response.getWriter().write("总文件不能超过5M"); }catch (FileUploadException e) { e.printStackTrace(); throw new RuntimeException("解析请求失败"); } //遍历： for(FileItem item:items){ //处理普通字段 if(item.isFormField()){ processFormField(item); }else{ //处理上传字段 processUploadField(item); } } } protected void processUploadField(FileItem item) { try { // InputStream in = item.getInputStream(); //找一个存放文件的位置；存放的文件名 String fileName = item.getName();//上传的文件的文件名 C:UserswzhtingDesktopa.txt a.txt(浏览器不同) if(fileName!=null&&!fileName.equals("")){ //限定上传文件的类型 if(!item.getContentType().startsWith("image")){ return; } fileName = FilenameUtils.getName(fileName); fileName = IdGenertor.genGUID()+"_"+fileName; //存放路径 String realPath = getServletContext().getRealPath("/WEB-INF/files"); //生成一个子目录 String childDirectory = genChildDirectory(realPath,fileName); File storeDirectory = new File(realPath+File.separator+childDirectory); if(!storeDirectory.exists()){ storeDirectory.mkdirs(); } // OutputStream out = new FileOutputStream(new File(storeDirectory, fileName)); // // int len = -1; // byte b[] = new byte[1024]; // while((len=in.read(b))!=-1){ // out.write(b, 0, len); // } // in.close(); // out.close(); // // item.delete();//清除临时文件 item.write(new File(storeDirectory, fileName)); } } catch (Exception e) { e.printStackTrace(); } } private String genChildDirectory(String realPath, String fileName) { int hashCode = fileName.hashCode(); int dir1 = hashCode&0xf; int dir2 = (hashCode&0xf0)>>4; String str = dir1+File.separator+dir2; File file = new File(realPath,str); if(!file.exists()){ file.mkdirs(); } return str; } //按照日期生成子目录 private String genChildDirectory(String realPath) { Date now = new Date(); DateFormat df = new SimpleDateFormat("yyyy-MM-dd"); String str = df.format(now); File file = new File(realPath,str); if(!file.exists()){ file.mkdirs(); } return str; } protected void processFormField(FileItem item) { //打印到控制台 String fieldName = item.getFieldName(); String fieldValue = ""; try { fieldValue = item.getString("UTF-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } System.out.println(fieldName+"="+fieldValue); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } } 做做笔记,传播知识,我是个勤劳的搬运工 1224144402@qq.com
本文题目：FileUpload组件-创新互联
网页路径：http://kswjz.com/article/hjoes.html