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STRUTS2 Study Note ten: File upload

Source: Internet
Author: User
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Struts2 upload 1, Struts2 by default Apache commons-fileupload2, STRUTS2 support three types of upload components 3, need to introduce commons-fileupload dependent package * commons-io-1.3.2.jar* COMMONS-FILEUPLOAD-1.2.1.JAR4, the form needs to use the Post submission method, the encoding type needs to be used: MULTIPART/FORM-DATA5, Struts2 action Gets the file name->> rule: Enter the name of the domain + fixed string filename Gets the file data->> rule: Name of the file input field gets the content type->> rule: Enter the name of the domain + Fixed string ContentType6, get input stream, write file with output stream action class 
 Packagecom.djoker.struts2;ImportJava.io.BufferedInputStream;ImportJava.io.BufferedOutputStream;ImportJava.io.File;ImportJava.io.FileInputStream;ImportJava.io.FileOutputStream;ImportJava.io.InputStream;ImportJava.io.OutputStream;ImportOrg.apache.struts2.ServletActionContext;Importcom.opensymphony.xwork2.Action; Public classuploadaction {PrivateString Myfilefilename; PrivateFile MyFile; PrivateString Desccontexttype;  PublicString Getmyfilefilename () {returnMyfilefilename; }     Public voidsetmyfilefilename (String myfilefilename) { This. Myfilefilename =Myfilefilename; }     PublicFile Getmyfile () {returnMyFile; }     Public voidsetmyfile (File myFile) { This. MyFile =MyFile; }     PublicString Getdesccontexttype () {returnDesccontexttype; }     Public voidSetdesccontexttype (String desccontexttype) { This. Desccontexttype =Desccontexttype; }         PublicString Execute ()throwsException {System.out.println (myfilefilename); InputStream is=NULL; OutputStream OS=NULL; Try{ is=NewBufferedinputstream (NewFileInputStream (myFile)); OS=NewBufferedoutputstream (NewFileOutputStream (Servletactioncontext.getservletcontext (). Getrealpath ("upload") + "/" +myfilefilename)); byte[] Bytebuffer =New byte[1024]; intLen = 0;  while(len = Is.read (bytebuffer)) > 0) {os.write (Bytebuffer,0, Len); }        } finally {            if(Is! =NULL) {is.close (); }            if(OS! =NULL) {os.close (); }        }        returnaction.success; }}

upload.jsp file 
<%@ Page Language="Java"ContentType="text/html; charset=gb18030"pageencoding="GB18030"%><!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=gb18030"><title>Insert Title here</title></Head><Body><formAction= "Uploadaction.action"Method= "POST"enctype= "Multipart/form-data">Select File:<inputtype= "File"name= "MyFile"><BR>File Description:<inputtype= "text"name= "desc"><BR>    <inputtype= "Submit"value= "Upload"></form></Body></HTML>
Struts.xml configuration, configure maximum file upload limit 
<?XML version= "1.0" encoding= "UTF-8"?><!DOCTYPE struts Public "-//apache software foundation//dtd struts Configuration 2.1.7//en" "Http://struts.apache. Org/dtds/struts-2.1.7.dtd "><Struts>        <!--when the Struts.xml configuration file changes, it will be loaded immediately, in the production environment is best not to configure -    <constantname= "Struts.configuration.xml.reload"value= "true"></constant>    <!--provide more friendly tips -    <constantname= "Struts.devmode"value= "true"></constant>    <!--setting for a character set -    <constantname= "Struts.i18n.encoding"value= "GB18030"/>    <!--maximum configuration file upload limit -    <constantname= "Struts.multipart.maxSize"value= "9999999999"></constant>    < Packagename= "Struts2"extends= "Struts-default" >        <Global-results>            <result>/success.jsp</result>            <resultname= "Error">/error.jsp</result>        </Global-results>        <Actionname= "Login"class= "Com.djoker.struts2.LoginAction">            <result>/success.jsp</result>            <resultname= "Error">/error.jsp</result>        </Action>        <Actionname= "Uploadaction"class= "Com.djoker.struts2.uploadAction">            <result>/success.jsp</result>        </Action>    </ Package>        <includefile= "Struts-user.xml"></include></Struts>

STRUTS2 Study Note ten: File upload

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