Detailed introduction to the use of spring assertions

Assertion is to determine that an actual value is what you expect, and if it is different, throw an exception.

Assert is often used for:

1. Determine whether the parameters of the method are normal values.
2. Used in juit.

 1 import org.springframework.util.Assert; 2  3 
 /** 4  * Created by hunt on 2017/6/27. 5  */ 6 public class AssertTest { 7     
 public static void main(String[] args) { 8         String name = null; 9         
 Assert.notNull(name,"name不能为空");10     }
  }

##Assert.notNull source code:

1     public static void notNull(Object object, String message) {        
if (object == null) {3             throw new IllegalArgumentException(message);4         }5     }

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