【JAVA】org.springframework.beans.FatalBeanException: Could not copy property 'beginInventory' from source to target

异常报错如下:

2020-06-23 09:52:13.674 [http-nio-8009-exec-1] [6e97d911bd4d97a5] [6e97d911bd4d97a5] [ERROR] org.springframework.beans.BeanUtils:Could not copy property 'beginInventory' from source to target; nested exception is java.lang.IllegalArgumentException
org.springframework.beans.FatalBeanException: Could not copy property 'beginInventory' from source to target; nested exception is java.lang.IllegalArgumentException
    at org.springframework.beans.BeanUtils.copyProperties(BeanUtils.java:625) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.BeanUtils.copyProperties(BeanUtils.java:537) 

出现该异常的代码行如下:

BeanUtils.copyProperties(src, dest);

经过排查原因如下:

src的POJO类中字段定义如下:

  private Integer beginInventory;

dest的POJO类中字段定义如下:

  private int beginInventory;

由于src的beginInventory值为null,导致无法赋值给dest中的int类型,所以报错

解决方法是,将src中的Integer类型字段赋予一个初始值(比如0)