hi,
i've tried with db but is complex, i've do in this way:
using the inteceptior of struts and the tag <s:file in jsp
private String saveFile(File file, String savePath, String fileName) {
fileName = fileName.replace(' ', '_');
File dirPath = new File(savePath);
if (!dirPath.exists()) {
dirPath.mkdirs();
}
try {
//retrieve the file data
InputStream stream = new FileInputStream(file);
//write the file to the file specified
OutputStream bos = new FileOutputStream(savePath + File.separator +
fileName);
int bytesRead;
byte[] buffer = new byte[8192];
while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {
bos.write(buffer, 0, bytesRead);
}
bos.close();
stream.close();
} catch (Exception e) {
return null;
}
return "img/item/" + fileName;
}
i simply put in the db the string.
works.
On Tue, May 19, 2009 at 21:13, Martin Gainty <[email protected]> wrote:
>
> Struts FileUploadInterceptor offers maximumSize,allowedTypes and
> allowedExtensions parameters specifically
>
> Interceptor parameters:
>
>
>
>
>
>
>
>
> maximumSize (optional) - the maximum size (in bytes) that the interceptor
> will allow a file reference to be set
> on the action. Note, this is not related to the various properties found in
> struts.properties.
> Default to approximately 2MB.
>
> allowedTypes (optional) - a comma separated list of content types (ie:
> text/html) that the interceptor will allow
> a file reference to be set on the action. If none is specified allow all
> types to be uploaded.
>
> allowedExtensions (optional) - a comma separated list of file extensions (ie:
> .html) that the interceptor will allow
> a file reference to be set on the action. If none is specified allow all
> extensions to be uploaded.
> http://struts.apache.org/2.0.14/struts2-core/apidocs/org/apache/struts2/interceptor/FileUploadInterceptor.html
>
> HTH
> Martin Gainty
> ______________________________________________
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>
>> Subject: RE: upload and store img
>> Date: Tue, 19 May 2009 13:11:19 -0400
>> From: [email protected]
>> To: [email protected]
>>
>> Retrieving from DB and outputting to HTTP:
>> Every time I've done this it has been without the use of struts. I use
>> a
>> servlet that looks for e request parameter storing an ID that resolves
>> to
>> the image in the DB. I lookup the image, set the response type for that
>>
>> image, then output the bytes that make up that image directly to the
>> response.
>> Say the servlet is mapped to "/GetImageServlet". You can then use that
>> path
>> As the SRC of an image as follows:
>> <IMG SRC="/GetImageServlet" />
>>
>>
>> Inserting the image from http request to DB:
>> I've done this with mysql and oracle, but am not too familiar with
>> postgres.
>>
>>
>> For this to work with fileuploadinterceptor, the POJO must have 3
>> properties:
>> public class Example {
>> ...
>> File upload;
>> String uploadFileName;
>> String uploadContentType;
>> ...
>> }
>>
>>
>> I use hibernate to put it in the DB. Here's how I did it with Oracle.
>> You can probably modify for this as necessary Postgres. For this to work
>> with
>> Hibernate, the POJO must have 1 encapsulated property:
>> public class Example {
>> ...
>> Blob attachment;
>> ...
>> }
>>
>>
>> This is the getter for that property:
>> public class Example {
>> ...
>> /**
>> * Returns a {...@link Blob} equivalent of this object's
>> * {...@link #upload}. Do not call this directly -- it
>> * it intended for Hibernate interaction with Oracle
>> ONLY.
>> *
>> * @return
>> * a {...@link Blob} equivalent of this object's
>> * {...@link #attachmentByteStream}.
>> */
>> public Blob getAttachment() {
>> try {
>> if(this.attachment != null) {
>> return this.attachment;
>> }
>> else {
>> if(this.upload != null) {
>> return
>> Hibernate.createBlob(
>> new
>> FileInputStream(upload));
>> }
>> else return null;
>> }
>> }
>> catch (IOException ioException) {
>> ioException.printStackTrace();
>> return null;
>> }
>> }
>> ...
>> }
>>
>>
>> Additionally, there are some other setters/getters Hibernate/Oracle
>> requires,
>> the base of their name must match the name declared in the hbm.xml file:
>> public class Example {
>> ...
>> /**
>> * Sets this item's {...@link #attachment} {...@link Blob}.
>> Do not call this
>> * directly -- it intended for Hibernate interaction
>> with Oracle ONLY.
>> *
>> * @param attachment
>> * the {...@link Blob} to set to this object's
>> {...@link #attachment}.
>> */
>> public void setAttachment(Blob attachment) {
>> this.attachment = attachment;
>> }
>>
>> public InputStream getAttachmentStream() throws
>> SQLException {
>> return (attachment==null ? null :
>> attachment.getBinaryStream());
>> }
>>
>> public void setAttachmentStream(InputStream
>> attachmentStream)
>> throws IOException {
>> this.attachment =
>> Hibernate.createBlob(attachmentStream);
>> }
>> ...
>> }
>>
>>
>> This is the relevant part of the hibernate mapping:
>> <hibernate-mapping>
>> <class name="com.foo.Example" table="EXAMPLE">
>> <property name="attachment" type="blob">
>> <column name="ATCHMNT_LOB" />
>> </property>
>> </class>
>> </hibernate-mapping>
>>
>>
>> This is the relevant fragment from the html form submitting to struts:
>> <s:form action="save"
>> name="requestform"
>> method="post"
>> enctype="multipart/form-data">
>> <s:file name="siteRequest.upload"
>> label="Attachment" />
>> </s:form>
>>
>> -----Original Message-----
>> From: Stefano Tranquillini [mailto:[email protected]]
>> Sent: Tuesday, May 19, 2009 12:29 PM
>> To: Struts Users Mailing List
>> Subject: UI: upload and store img
>>
>> Hi all.
>> i've to do a UI that permits to store some images, how can i do that?
>> i tried to use upload file but is quite complex and doesn't work.
>> is better if i put the img inside the db?
>> someone of u has experience about that?
>> if i put inside the db the img (i use postrgres) how can i display it in
>> a jsp?
>>
>> thanks folks
>>
>> --
>> Stefano
>>
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