Here is an example to illustrate how to upload an actionform file: (No jar package is required)
Create a form on the page:
<Li> test struts File Upload </LI> <br>
<Form action = "Upload. Do" method = "Post" enctype = "multipart/form-Data"> //Enctype = "multipart/form-Data" is used for uploading. You need to add
Title: <input type = "text" name = "title"> <br>
File: <input type = "file" name = "myfile"> <br> //Type: File
<Input type = "Submit" value = "Submit">
</Form>
Create a successfully uploaded page:
On this page, retrieve the name of the uploaded file, including the title:
<Body>
Title: $ {uploadform. Title} <br> // retrieve from actionform
File Name: $ {uploadform. myfile. filename} <br>
</Body>
Create actionform (use static ):
Import org. Apache. Struts. Action. actionform;
Import org. Apache. Struts. Upload. formfile;
/**
* Upload actionform
* @ Author Administrator
*
*/
Public class uploadactionform extends actionform {
Private String title;
// Formfile must be used
Private formfile myfile ;//The file type is declared as formfile, which must be declared as follows: use this to receive files
Public String gettitle (){
Return title;
}
Public void settitle (String title ){
This. Title = title;
}
Public formfile getmyfile (){
Return myfile;
}
Public void setmyfile (formfile myfile ){
This. myfile = myfile;
}
Then write the corresponding action:
/**
* Upload action
* @ Author Administrator
*
*/
Public class uploadtestaction extends action {
@ Override
Public actionforward execute (actionmapping mapping, actionform form,
Httpservletrequest request, httpservletresponse response)
Throws exception {
Uploadactionform UAF = (uploadactionform) form ;// Get form data
System. Out. println ("title" + UAF. gettitle ());// Get title
Formfile myfile = UAF. getmyfile ();// When a new formfile is created, the file will be put in and the file will be obtained (call formfile in action to obtain the uploaded file)
If (myfile! = NULL ){
System. Out. println ("filename =" + myfile. getfilename ());// This object can be used to obtain the file name, file type, and size. For details, see the document.
Fileoutputstream Fos = new fileoutputstream ("C: \" + myfile. getfilename ());// New: An output stream with a drive C. Its name is called its own name.
FOS. Write (myfile. getfiledata ());// Write to Hard Disk
FOS. Flush ();
FOS. Close ();
}
Return Mapping. findforward ("success ");
}
}
}
Configure
The test is OK.
Configure the cache for the size of files that can be uploaded and the temporary directory:
Implementing this function is configured in struts-config.xml,
</Action-mappings>
<Controller maxfilesize = "10 m" nocache = "true"/> // The Controller label has many attributes. For details, see DTD (located in struts. org. apache. struts. in the struts-config-1-2.dtd in resource), nocache = "true" indicates that the cache is cleared each time
<Plug-in classname = "com. bjsxt. Struts. utildateconverterinitwit2d-ugin"/>
</Struts-config>
Summary:
* Page configuration, such:
<Form action = "Upload. Do" method = "Post" enctype = "multipart/form-Data">
Title: <input type = "text" name = "title"> <br>
File: <input type = "file" name = "myfile"> <br>
<Input type = "Submit" value = "Submit">
</Form>
* Use formfile in actionform to receive uploaded files. For more information, see uploadactionform. java.
* Call formfile in action to obtain the data of the uploaded file. Use stream output to complete the upload. For details, see uploadtestaction. java.
* Use the <Controller/> label to configure the upload parameters, for example, <controller maxfilesize = "10 m"/>
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