tapestry-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Allen Guo <elon....@gmail.com>
Subject Re: How to load a image dynamiclly in tapestry5.0.4
Date Wed, 23 May 2007 05:12:11 GMT

But I don't think it's useful for me to organize TAPESTRY application
effectlly.
That books just represent basic programming Philosophy .
Jesse Kuhnert 写道:
> +1 I picked it up after seeing Howard mentioned it and loved it. :)
>
> On 5/22/07, Howard Lewis Ship <hlship@gmail.com> wrote:
>>
>> The book "The Pragmatic Programmer" is an excellent start on learning
>> how
>> to
>> organize your code and your mind and work effectively,
>> professionally, and
>> pragmatically.
>>
>> http://www.powells.com/biblio/65-9780201616224-0
>>
>> On 5/21/07, Allen Guo <elon.guo@gmail.com> wrote:
>> >
>> > Thanks , It's running now
>> > But suppose there is five properties of Product is relative with image
>> > Product class looks like
>> > class Product{
>> > private String _img1;
>> > private String _img2;
>> > private String _img3;
>> > private String _img4;
>> > private String _img5;
>> > ....
>> > }
>> >
>> > So for show the img, I have to define the corresponding Img url in
>> > ProductDetai.java like
>> > // ProductDetail.java
>> > class ProductDetail{
>> > private String _imgUrl1;
>> > private String _imgUrl2;
>> > private String _imgUrl3;
>> > private String _imgUrl4;
>> > private String _imgUrl5;
>> > public String getProductImageURL1() {
>> > return "http://static.myco.com/product-images/" + _imgUrl1 + ".gif";
>> > }
>> > public String getProductImageURL2() {
>> > return "http://static.myco.com/product-images/" + _imgUrl2 + ".gif";
>> > }
>> > public String getProductImageURL3() {
>> > return "http://static.myco.com/product-images/" + _imgUrl3 + ".gif";
>> > }
>> > public String getProductImageURL4() {
>> > return "http://static.myco.com/product-images/" + _imgUrl4 + ".gif";
>> > }
>> > public String getProductImageURL5() {
>> > return "http://static.myco.com/product-images/" + _imgUrl5 + ".gif";
>> > }
>> > }
>> > Imagine another simple page like ProductList,
>> > I have to define another list to show the image even there is only a
>> > dynamic image for every product
>> > The ProductList may look like
>> > // ProductList.java
>> > class ProductList{
>> > private List _productList;
>> > private List _imgList;
>> > ......
>> > }
>> > Oh god , so terrible codes.
>> > There are a lot of similar require my project.
>> > Can you give me more suggestion?
>> >
>> > Howard Lewis Ship 写道:
>> >
>> > > In order to answer this question, some background is needed.
>> > >
>> > > If you know the product's id (whatever you use, where it's SKU
>> number
>> > > or a
>> > > surrogate key) ... what is the exact process from going from that
>> to a
>> > > URL
>> > > suitable for an <img> tag?
>> > >
>> > > That is ... are the images stored in the database? Or are they on
>> the
>> > > file
>> > > system somewhere? If they are files on the file system, are those
>> files
>> > > mapped to a client-visible URL?
>> > >
>> > > In the latter case, you can do something like:
>> > >
>> > > <img t:id="productImage" src="prop:productImageURL"/>
>> > >
>> > > public String getProductImageURL() {
>> > > return "http://static.myco.com/product-images/" + _productId +
>> ".gif";
>> > > }
>> > >
>> > >
>> > >
>> > > Assigning a t:id to a tag without specifying a component type
>> creates
>> > > an Any
>> > > component, a component that just renders whatever tag and informal
>> > > parameters you provide it. Here wer'e linking that to some Java code
>> > > in the
>> > > corresponding page or component that computes the URL of the product
>> > > based
>> > > on an instance variable. Probably your example is more complicated,
>> > > but you
>> > > get the idea.
>> > >
>> > > There's another approach used when the data is inside the database,
>> > > but we
>> > > can dive into that if the above solution is insufficient.
>> > >
>> > > Assets are useful for accessing resources inside the web application
>> > > context, or on the classpath, and includes logic related to
>> > > localization ...
>> > > but it is not always appropriate when accessing resources that are
>> well
>> > > outside the web application itself.
>> > >
>> > > On 5/19/07, Allen Guo <elon.guo@gmail.com> wrote:
>> > >>
>> > >> Hi All,
>> > >>
>> > >> I want to show the ProductDetail page with product image. It looks
>> like
>> > >> <img src="p_001.jpg" />.
>> > >> You know, every product has different image name,so I need to pass
>> the
>> > >> string 'p_001.jpg' to the corresponding page.
>> > >> As result the img tag should look like <img
>> src="${product.image}"/>
>> or
>> > >> I can use Asset to do it.
>> > >>
>> > >> But I tried to do it using the first approach, exception occured.
>> > >> And I don't know how to the second approach.
>> > >> Can anyone give me an idea?
>> > >>
>> > >> Thank in advance
>> > >> Allen Guo
>> > >>
>> > >>
>> > >>
>> ---------------------------------------------------------------------
>> > >> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
>> > >> For additional commands, e-mail: users-help@tapestry.apache.org
>> > >>
>> > >>
>> > >
>> > >
>> >
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
>> > For additional commands, e-mail: users-help@tapestry.apache.org
>> >
>> >
>>
>>
>> -- 
>> Howard M. Lewis Ship
>> TWD Consulting, Inc.
>> Independent J2EE / Open-Source Java Consultant
>> Creator and PMC Chair, Apache Tapestry
>> Creator, Apache HiveMind
>>
>> Professional Tapestry training, mentoring, support
>> and project work. http://howardlewisship.com
>>
>
>
>


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
For additional commands, e-mail: users-help@tapestry.apache.org


Mime
View raw message