BeanUtils Copy Properties: Register ConvertUtils

Question

I have a web application written in Java. Im uses the BeanUtils.copyProperties method. If the date field is null, it causes an error. I solved it using the ConvertUtils.register method.

 ConvertUtils.register(new DateConverter(null), Date.class); 

Now it works, but what is the correct way to use ConvertUtils.register . Where should it be located?

Answer 1

What you did is CORRECT for only one class (Date). This is achieved for all supported types, including Date, by calling the register method on ConvertUtilsBean , as shown below:

  ConvertUtilsBean convertUtilsBean = BeanUtilsBean.getInstance().getConvertUtils(); convertUtilsBean.register(false, true, -1); 

Here, the first argument false means that it does not throw a conversion exception. The second argument true represents, if there is an exception, uses null as the default value. The third argument -1 means that the array types will default to null. If you want arrays with a specific size by default, specify the size as the third parameter.

See here (ConvertUtilsBean Javadoc) for more details.

Answer 2

A good place is ServletContextListener, you just need to do it once.

ServletContextListener is not called

Answer 3

To register your converters in the right place, check the links below:

http://www.coderanch.com/t/459630/Struts/Apache-Commons-Custom-Converter-Implementation http://mail-archives.apache.org/mod_mbox/struts-user/200303.mbox/% [e-mail] % 3E