BeanUtils

1、org.apache.commons.beanutils.BeanUtils.copyProperties(dest, src)
org.springframework.beans.BeanUtils.copyProperties(src, dest)
注意：2者的入参顺序不同，严重 :cry:

2、spring的BeanUtils.copyProperties抛出RuntimeException
apache的会抛出 checked Exception

3、spring的BeanUtils.copyProperties 要求property类型严格一致，否则就出错
比如srcBean有一个属性是Short, destBean有一个同名属性，但是类型是Integer，就会出错

Exception in thread "main" org.springframework.beans.FatalBeanException: Could not copy properties from source to target; nested exception is java.lang.IllegalArgumentException: argument type mismatch
	at org.springframework.beans.BeanUtils.copyProperties(BeanUtils.java:588)
	at org.springframework.beans.BeanUtils.copyProperties(BeanUtils.java:498)
	at cn.com..bussiness.bb.main(bb.java:23)
Caused by: java.lang.IllegalArgumentException: argument type mismatch
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.beans.BeanUtils.copyProperties(BeanUtils.java:585)
	... 2 more

4、org.apache.commons.beanutils.BeanUtils.copyProperties 会把null的Integer转换成0，再复制