Java component smartupload implement upload file function _java

Using JSP and Serlvet to achieve the simplest upload, for your reference, the specific contents are as follows

1, page index.jsp

 <%@ page language= "java" pageencoding= "UTF-8"%> <% String Path = Request.get 
ContextPath (); 
String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/"; %> <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >  
 

2, the action jump to the upload servlet, so to web.xml inside configuration, Web.xml:

<?xml version= "1.0" encoding= "UTF-8"?> <web-app version= "2.5" xmlns= "http://java.sun.com/xml/ns/" 
Java ee " 
 xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance " 
 xsi:schemalocation=" http://java.sun.com/ Xml/ns/javaee 
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd "> 
 <servlet> 
 < Servlet-name>uploadaction</servlet-name> 
 <servlet-class>com.pop.action.smartuploadaction </servlet-class> 
 </servlet> 
 <servlet-mapping> 
 <servlet-name>uploadaction </servlet-name> 
 <url-pattern>/upload/*</url-pattern> 
 </servlet-mapping> 
 <welcome-file-list> 
 <welcome-file>index.jsp</welcome-file> 
 </ Welcome-file-list> 

3, mapped to the action file, Smartuploadaction.java:

Package com.pop.action; 
Import java.io.IOException; 
Import javax.servlet.ServletException; 
Import Javax.servlet.http.HttpServlet; 
Import Javax.servlet.http.HttpServletRequest; 
Import Javax.servlet.http.HttpServletResponse; 
Import Javax.servlet.jsp.JspFactory; 
 
Import Javax.servlet.jsp.PageContext; 
Import Com.soft4j.httpupload4j.Request; 
Import Com.soft4j.httpupload4j.SmartUpload; 
 
Import com.soft4j.httpupload4j.SmartUploadException;  
 public class Smartuploadaction extends HttpServlet {private static final long serialversionuid = -8610555375032925108l; @Override protected void DoPost (HttpServletRequest req, HttpServletResponse resp) throws Servletexception, Ioexcep 
 tion {req.setcharacterencoding ("utf-8"); 
 Resp.setcharacterencoding ("Utf-8"); 
 Smartupload su = new Smartupload (); 
 Due to the transmission of multipart/form-data cause req can not be used, so use smartupload generated request request Reqest = Su.getrequest (); Get PageContext object PageContext PageContext = Jspfactory.getdefaultfactory ()
  . Getpagecontext (This, req, resp, NULL, True, 8192, true); 
 Su.initialize (PageContext); 
  try {su.upload (); 
 Upload to the upload directory of this project Su.save ("Upload"); 
 catch (Smartuploadexception e) {e.printstacktrace (); 
 ///Use the Reqest object generated by Smartupload to get the parameter String uname = Reqest.getparameter ("uname") passed by the page; 
 System.out.println (uname); 
 } 
}

Finally note: The component package used is smartupload.zip.

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.