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 <[EMAIL PROTECTED]> 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
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