First of all, Struts.xml. If you want to restrict the type of upload file, you can configure an interceptor:
<!--dynamically specify the file types that are allowed to be uploaded by dynamically setting Allowtypes properties-->
<param name= "Allowtypes" >image/bmp,image/png,image/gif,image/jpeg</param>
Single File Upload jsp:
Single File upload successful interface:<body> <center> <form action= "upload.action" method= "POST" enctype= "multipart/ Form-data "> <table cellpadding=" 0 "cellspacing=" 0 "style=" width:350px; " > <tr> <td colspan= "2" class= "Getcenter" > Single File Upload </td> </tr> <tr> <td> file title: </td> <td> <input type= "text" name= "title" class= "txt"/> </td> </tr> <tr> <td> Select file: </td> <td> <input type= "file" name= "file" class= "file"/> </td> </tr> <tr> <td colspan= "2" class= "Getcenter" > <input type= "Submit" value= "Upload"/> < Input type= "reset" value= "reset"/> </td> </tr> </table> </form> </center> </body>
<body> File Upload successful!!!
Multiple files:<script type= "Text/javascript" > Function addtr () {var tab = document.getElementById ("tab"); var newrow = Tab.insertrow (tab.rows.length); Newrow.insertcell (0). innerhtml= "<input type=\" file\ "name=\" file\ "/>"; function Delrow () {var tab = document.getElementById ("tab"); if (tab.rows.length>3) {tab.deleterow (tab.rows.length-1); }else{alert ("Keep at least two lines.") "); } </script>
Multi-File Successful interface:
<body> <c:foreach items= "${filefilename}" var= "file" varstatus= "status" > files uploaded successfully!!!
web.xml://Configure Struts-clean to avoid the first upload without file<filter> <filter-name>struts-cleanup</filter-name> <filter-class> org.apache.struts2.dispatcher.actioncontextcleanup</filter-class> </filter> < filter-mapping> <filter-name>struts-cleanup</filter-name> <url-pattern>/*</ Url-pattern> </filter-mapping>
Struts.xml<struts> <constant name= "struts.i18n.encoding" value= "Utf-8" ></constant> <package name= " Default "namespace="/"extends=" Struts-default "> <action name=" Product "class=" Com.tudou.struts.action.ProductAction "> </action> <action name=" upload "class=" Com.tudou.struts.action.FileUpLoadAction "> <param name=" Savepath ">/uploadfiles</param> <result Name= "Success" >/fileSuccess.jsp</result> </action> <action name= "Multiupload" Com.tudou.struts.action.MultiFileUpLoadAction "> <param name=" Savepath ">/uploadfiles</param> < Result name= "Success" >/success.jsp</result> </action> </package> <package name= "MyPackage" Namespace= "/" extends= "Struts-default" > <action name= "Login" class= "Com.tudou.struts.action.LoginAction" > <result name= "Input" >/login.jsp</result> <result name= "index" >/index.jsp</result> </ Action> </package>Single File Action:
Package com.tudou.struts.action; Import Java.io.File; Import Java.io.FileInputStream; Import Java.io.FileOutputStream; Import Org.apache.struts2.ServletActionContext; Import Com.opensymphony.xwork2.ActionContext; public class Fileuploadaction {private string title;//File title private files file;//domain private string filecontenttype ; File type private String filefilename; filename private String Savepath; Upload address public void Setsavepath (String savepath) {this.savepath = Savepath; Public String GetTitle () {return title; public void Settitle (String title) {this.title = title; Public file GetFile () {return file; public void Setfile (file file) {this.file = file; Public String Getfilecontenttype () {return filecontenttype; } public void Setfilecontenttype (String filecontenttype) {this.filecontenttype = Filecontenttype; Public String Getfilefilename () {return filefilename; public void Setfilefilename (String filefilename) {THis.filefilename = Filefilename; //Returns the Save Address public String Getsavepath () throws Exception {return servletactioncontext.getrequest (). Getrealpath (Savep ATH); The public String execute () throws Exception {//the original filename of the server's file save address to build the upload file output stream FileOutputStream fos = new Fileoutputstrea M (This.getsavepath () + "\" + this.getfilefilename ()); To upload files to create a file input stream FileInputStream fis = new FileInputStream (This.getfile ()); Writes the uploaded file content to the server byte[] b = new byte[1024]; int len = 0; while (len = Fis.read (b)) > 0) {fos.write (b, 0, Len); Actioncontext.getcontext (). put ("Upload", this); Return "Success"; } }
Multi-File Upload action:Package com.tudou.struts.action; Import Java.io.File; Import Java.io.FileInputStream; Import Java.io.FileOutputStream; Import Org.apache.struts2.ServletActionContext; Import Com.opensymphony.xwork2.ActionContext; public class Multifileuploadaction {//private string[] title;//File title private file[] file;//file domain private String file Contenttype[]; File type private string[] filefilename; filename private String Savepath; Upload address public void Setsavepath (String savepath) {this.savepath = Savepath; }//Public string[] GetTitle () {//return title; }////public void Settitle (string[] title) {//this.title = title; Public file[] GetFile () {return File; public void Setfile (file[] file) {this.file = File; String[] Getfilecontenttype () {return filecontenttype; } public void Setfilecontenttype (string[] filecontenttype) {this.filecontenttype = Filecontenttype; String[] Getfilefilename () {return filefilename; } public void Setfilefilename (string[] filefilename) {this.filefilename = Filefilename; //Returns the Save Address public String Getsavepath () throws Exception {return servletactioncontext.getrequest (). Getrealpath (Savep ATH); Public String Execute () throws Exception {for (int i = 0; i < file.length i++) {//Set up upload file output with the original filename of the server's file save address Stream FileOutputStream fos = new FileOutputStream (This.getsavepath () + "\" + this.getfilefilename () [i]); Create file input stream FileInputStream fis = new FileInputStream (This.getfile () [i]) by uploading files; Writes the uploaded file content to the server byte[] b = new byte[1024]; int len = 0; while (len = Fis.read (b)) > 0) {fos.write (b, 0, Len); } actioncontext.getcontext (). put ("Upload", this); Return "Success"; } }
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