可拖拽和带预览图的jQuery文件上传插件ssi-uploader java后台代码

package upload; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.net.URLDecoder; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Iterator; import java.util.List; import java.util.Random; 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; /** * Servlet implementation class UploadAction */ public class UploadAction extends HttpServlet { private static final long serialVersionUID = 1L; //上传文件的保存路径 protected String configPath = "uploadFile"; protected String dirTemp = "uploadFile/temp"; protected String dirName = "file"; /** * @see HttpServlet#HttpServlet() */ public UploadAction() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.setCharacterEncoding("UTF-8"); response.setContentType("text/html; charset=UTF-8"); PrintWriter out = response.getWriter(); //文件保存目录路径 //String savePath = "E:/"; String savePath = this.getServletContext().getRealPath("/") + configPath; // 临时文件目录 String tempPath = this.getServletContext().getRealPath("/") + dirTemp; // 时间 /** SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM"); String ymd = sdf.format(new Date()); savePath += "/" + ymd + "/"; **/ System.out.println("------->"+savePath); //创建文件夹 File dirFile = new File(savePath); if (!dirFile.exists()) { dirFile.mkdirs(); } /**tempPath += "/" + ymd + "/"; **/ //创建临时文件夹 File dirTempFile = new File(tempPath); if (!dirTempFile.exists()) { dirTempFile.mkdirs(); } DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(20 * 1024 * 1024); //设定使用内存超过5M时，将产生临时文件并存储于临时目录中。 factory.setRepository(new File(tempPath)); //设定存储临时文件的目录。 ServletFileUpload upload = new ServletFileUpload(factory); upload.setHeaderEncoding("UTF-8"); try { List items = upload.parseRequest(request); System.out.println("items = " + items); Iterator itr = items.iterator(); while (itr.hasNext()) { FileItem item = (FileItem) itr.next(); String fileName = item.getName(); long fileSize = item.getSize(); if (!item.isFormField()) { String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase(); SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt; try{ File uploadedFile = new File(savePath, newFileName); OutputStream os = new FileOutputStream(uploadedFile); InputStream is = item.getInputStream(); byte buf[] = new byte[1024];//可以修改 1024 以提高读取速度 int length = 0; while( (length = is.read(buf)) > 0 ){ os.write(buf, 0, length); } //关闭流 os.flush(); os.close(); is.close(); System.out.println("上传成功！路径："+savePath+"/"+newFileName); out.print(savePath+"/"+newFileName); }catch(Exception e){ e.printStackTrace(); } }else { String filedName = item.getFieldName(); if(filedName.equals("customData")){ System.out.println("用户自定义参数==============="); System.out.println("FieldName："+filedName); System.out.println(URLDecoder.decode(URLDecoder.decode(item.getString(), "utf-8"), "utf-8")); }else if(filedName.equals("tailor")){ System.out.println("裁剪后的参数==============="); System.out.println("FieldName："+filedName); System.out.println(new String(item.getString().getBytes("iso-8859-1"), "utf-8")); // 获得裁剪部分的坐标和宽高 System.out.println("String："+item.getString()); } } } } catch (FileUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } out.flush(); out.close(); } }