Java image Upload/File upload __java

Picture upload/File upload

1. Creating a Web project create a new JSP

<%@ page language= "java" import= "java.util.*" pageencoding= "UTF-8"%>
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >


<title>my JSP ' index.jsp ' starting page</title>

<body>
<form action= "<%=request.getcontextpath ()%>/upload.action" method= "post" enctype= "Multipart/form-data" >
Please select the uploaded file/Picture:
<input type= "File" name= "file"/>
<!--Please choose the uploaded Picture:-->
<!--<input type= "file" name= "file" accept= "image/*"/>-->
<input type= "Submit" value= "Upload"/>
</form>
</body>

2 Web.xml

<?xml version= "1.0" encoding= "UTF-8"?>
<web-app version= "2.5"
Xmlns= "Http://java.sun.com/xml/ns/javaee"
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 ">
<display-name></display-name>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:SpringMVC.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>

<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

</web-app>

3 Applicationcontext.xml

4 Springmvc.xml

<beans>

<!--is very important-->
<bean id= "Multipartresolver" class= "Org.springframework.web.multipart.commons.CommonsMultipartResolver" >
<property name= "defaultencoding" value= "Utf-8" ></property>
</bean>

</beans>

5 Controller:

Package Com.bwie.controller;


Import Java.io.File;
Import java.io.IOException;
Import Java.util.UUID;


Import Javax.servlet.http.HttpServletRequest;
Import Org.springframework.stereotype.Controller;
Import org.springframework.web.bind.annotation.RequestMapping;
Import Org.springframework.web.multipart.MultipartFile;
Import Org.springframework.web.multipart.MultipartHttpServletRequest;



@Controller
public class Powercontroller {

@RequestMapping ("Upload")
public void upload (HttpServletRequest request) {
Get support File upload Request Object Multiparthttpservletrequest
Multiparthttpservletrequest mtpreq = (multiparthttpservletrequest) request;
Getting files in a file field through Mtpreq
Multipartfile file = mtpreq.getfile ("file");
Get the file's original file name through the Multipartfile object
String fileName = File.getoriginalfilename ();
Generate filename for a UUID
UUID Randomuuid = Uuid.randomuuid ();
Get the suffix name of the file
int i = Filename.lastindexof (".");
String uuidname = randomuuid.tostring () +filename.substring (i);
Gets the path address of the server (the saved address of the uploaded file)
String Realpath = Request.getsession (). Getservletcontext (). Getrealpath ("/file");
Convert a path to a folder and determine if the folder exists
File dir = new file (Realpath);
if (!dir.exists ()) {
Dir.mkdir ();
}
Gets the save path for a file
String Path = realpath+ "/" +uuidname;


Create a new space for the file in this server, * No data
File NewFile = new file (path);

try {
File.transferto (new File (path));
catch (IllegalStateException e) {
TODO auto-generated Catch block
E.printstacktrace ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}

SYSTEM.ERR.PRINTLN ("-----Server's path address is::" +realpath);
SYSTEM.ERR.PRINTLN ("-----Picture name is::" +filename);
SYSTEM.ERR.PRINTLN ("-----Picture new name is::" +uuidname);
SYSTEM.ERR.PRINTLN ("-----Picture New path is::" +path);

}
}