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First, create the page to upload the file, the code is as follows
1. Struts2 can also be easily implemented with multiple file uploads. Add more than one file field to the Input form field: multifileupload.jsp
1 <%@ Page Language="Java"ContentType="text/html; Charset=utf-8"%>2 <%@ taglib URI="/struts-tags"prefix="s" %>3 <HTML>4 <Head>5 <title>Multiple file uploads</title>6 </Head>7 <Body>8 <FontColor= "Red"><S:fielderror/></Font>9 <formAction= "Multifileupload.action"Method= "POST"enctype= "Multipart/form-data">TenFile title:<inputtype= "text"name= "title"size= " the"value= "${param.title}"/><BR/> One <!--set two file fields with the same name - ASelect the first file:<inputtype= "File"name= "Upload"size= " the"/><BR/> -Select a second file:<inputtype= "File"name= "Upload"size= " the"/><BR/> - <inputtype= "Submit"value= "Upload"/> the </form> - </Body> - </HTML>
2. Encapsulate the multiple file domains in an action class using an array: Multifileuploadaction.java
1 Packageorg.qiujy.web.struts2;2 ImportJava.io.BufferedInputStream;3 ImportJava.io.BufferedOutputStream;4 ImportJava.io.File;5 ImportJava.io.FileInputStream;6 ImportJava.io.FileOutputStream;7 Importjava.io.IOException;8 ImportJava.io.InputStream;9 ImportJava.io.OutputStream;Ten ImportOrg.apache.struts2.ServletActionContext; One ImportCom.opensymphony.xwork2.ActionSupport; APublicclass multifileuploadactionextendsActionsupport { -Privatestaticfinalintbuffer_size = 16 * 1024; - //file Title the PrivateString title; - //to encapsulate multiple uploaded file domain objects with file arrays - Privatefile[] upload; - //to encapsulate multiple upload file names with a string array + Privatestring[] Uploadfilename; - //to encapsulate multiple upload file types with a string array + Privatestring[] Uploadcontenttype; A //directory path to save files (via Dependency injection) at PrivateString Savepath; - //The following are getter and setter for all attributes. Omitted... - //one of your own packages copy the source file object into the target file object - privatestaticvoid Copy (file src, file dst) { -InputStream in =NULL; -OutputStream out =NULL; in Try { -in =NewBufferedinputstream (NewFileInputStream (SRC), buffer_size); toout =NewBufferedoutputstream (NewFileOutputStream (DST), + buffer_size); - byte[] buffer =Newbyte[buffer_size]; the intLen = 0; * while(len = in.read (buffer)) > 0) { $Out.write (buffer, 0, Len);Panax Notoginseng } -}Catch(Exception e) { the e.printstacktrace (); +}finally { A if(NULL!=In ) { the Try { + in.close (); -}Catch(IOException e) { $ e.printstacktrace (); $ } - } - if(NULL!=Out ) { the Try { - out.close ();Wuyi}Catch(IOException e) { the e.printstacktrace (); - } Wu } - } About } $ @Override - PublicString Execute ()throwsException { -file[] Srcfiles = This. Getupload (); - //process Each file that you want to upload A for(inti = 0; i < srcfiles.length; i++) { + //Create directory file full path based on server's file save address and original file name theString Dstpath =Servletactioncontext.getservletcontext () -. Getrealpath ( This. Getsavepath ()) $+ "\" + this.getuploadfilename () [i]; theFile Dstfile =NewFile (dstpath); the This. Copy (Srcfiles[i], dstfile); the } the returnsuccess; - } in}
3, in Struts.xml configuration only need to change the name of the action to configure the rest of the basic do not need to change what
Struts2 Multi-File upload principles and examples
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