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BeanUtils.copyProperties()的用法;

2019-11-11 02:53:14
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虽然目前已经有很多文章介绍此方法的用法,但是既然自己遇到了。 还是记录一下吧。

导包:import org.sPRingframework.beans.BeanUtils;

源代码的介绍:

/** * Copy the property values of the given source bean into the target bean. * <p>Note: The source and target classes do not have to match or even be derived * from each other, as long as the properties match. Any bean properties that the * source bean exposes but the target bean does not will silently be ignored. * <p>This is just a convenience method. For more complex transfer needs, * consider using a full BeanWrapper. * @param source the source bean * @param target the target bean * @throws BeansException if the copying failed * @see BeanWrapper */ public static void copyProperties(Object source, Object target) throws BeansException { copyProperties(source, target, null, (String[]) null); }

介绍: BeanUtils.copyProperties(bean, detailBean); //bean 给detailBean 赋值 此方法是将前面的bean 给detailBean赋值。

详细介绍: BorrowInfoBean bean=new BorrowInfoBean(); bean=this.getBorrowInfo(999); //此句意思就是查询bean的信息;

BorrowInfoBean detailBean=new BorrowInfoBean (); //新的bean

BeanUtils.copyProperties(bean, detailBean); //bean 给detailBean 赋值

(未验证,从别的博客看到)要注意一点,java.util.Date是不被支持的,而它的子类java.sql.Date是被支持的。因此如果对象包含时间类型的属性,且希望被转换的时候,一定要使用java.sql.Date类型。否则在转换时会提示argument mistype异常。


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