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參考文檔 = https://www.cnblogs.com/mkdlf/p/7234906.html?utm_source=itdadao&utm_medium=referral
這裏的BeanUtils是BeanUtils是org.springframework.beans.BeanUtils,和org.apache.commons.beanutils.BeanUtils是有區別的
BeanUtils.copyProperties(ojb, tarObj, “id”,“ver”);
將obj的字段拷貝到tarObj中,除了id和ver,第三個字段之後是可變參數,用來指定哪些字段不用拷貝
public void test() throws Exception
{
//1.生成對象
Student s1 = new Student();
Student s2 = new Student();
//2.通過set方法賦值
s1.setId(1);
s1.setName("VN");
//s1.setAge(19);//基本數據類型可以爲null,null也能拷貝
s1.setClassID(5);
s1.setBirthday(new Date());//特殊類型不能爲null
//需求:把s1的屬性值拷貝到S2中,
//注意參數的順序,第三個參數之後爲可選參數,指定哪些字段不用拷貝
BeanUtils.copyProperties(s1, s2,"id");
System.out.println(s1);
System.out.println(s2);
}