java通过js上传文件

简单的利用java与js实现文件上传 package com.fendou.myString; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.Iterator; 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.FileItemFactory; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class FileUpload extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { boolean a=ServletFileUpload.isMultipartContent(request); if(a){ FileItemFactory factory=new DiskFileItemFactory(); ServletFileUpload upload=new ServletFileUpload (factory); Iterator items; try{ items=upload.parseRequest (request).iterator(); while(items.hasNext()){ FileItem item=(FileItem) items.next(); if(!item.isFormField()){ String name=item.getName (); String fileName=name.substring(name.lastIndexOf("\\")+1, name.length()); String path=request.getRealPath("file")+File.pathSeparatorChar+fileName; File uploadFile=new File &#40;path&#41;; request.getSession ().setAttribute("file", uploadFile); item.write(uploadFile); response.setContentType ("text/html"); response.setCharacterEncoding("utf-8"); PrintWriter out=response.getWriter(); // out.print("<font size='2'> 上传的文件为："+name+"<br>"); // out.print("保存在服务器上 的地址为："+path+"</font>"); } } }catch(Exception e){ e.printStackTrace(); } } response.sendRedirect("smartupload.jsp"); } }