The basic use of spring's assertion tool class assert

These days more busy looking at the previous project, found this spring under the Assert method, (previously used, but it seems to forget almost the * *)

Org.springframework.util.Assert;

The Assert assertion tool class, typically used for data legitimacy checks.

It's usually written like this in the usual judgment.

if (message== null | | message.equls ("")) {
throw new IllegalArgumentException ("Incorrect input information!");
}

The code above with the Assert tool class can be simplified to:

Assert.hastext (Message, "Input information Error!");

Here's a look at the common assertion methods in the Assert class that I collected:

Assert.notnull (Object object, "object is required")-Object non-empty
Assert.istrue (Object object, "object must be True")-the object must be True
Assert.notempty (Collection Collection, "Collection must not being empty")-collection non-empty
Assert.haslength (String text, "text must be specified")-the character is not null and the character length is not 0
Assert.hastext (String text, "text must not is empty")-text is not null and must contain at least one character that is not a space
Assert.isinstanceof (class Clazz, Object obj, "clazz must be of type [Clazz]")-obj must be able to be properly styled as a clazz-specified class

The basic use of spring's assertion tool class assert