/**
 * 浅拷贝的工具类
 */
public class PropertiesUtil {

    /**
     * 两个类，属性名一样的元素，复制成员。
     */
    public static void copy(Object source,Object target){
        Class<?> sourceClass=source.getClass();
        Class<?> targetClass=target.getClass();
        Field [] sourceFields=sourceClass.getDeclaredFields();
        //遍历成员
        for (int i = 0; i < sourceFields.length; i++) {
            //获取第i个元素
            Field field=sourceFields[i];
            //设置可见性
            field.setAccessible(true);
            //拿到成员名
            String name = field.getName();
            Field targetField=null;
            try {
                targetField = targetClass.getDeclaredField(name);
            } catch (NoSuchFieldException e) {
                //e.printStackTrace();
                continue;
            }
            //复制属性的值
            targetField.setAccessible(true);
            try {
                targetField.set(target,field.get(source));
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 两个类，属性名一样的元素，复制成员。
     */
    public static <T> T copy(Object source,Class<T> targetClass){
        Class<?> sourceClass=source.getClass();
        T target= null;
        try {
            target = targetClass.newInstance();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        Field [] sourceFields=sourceClass.getDeclaredFields();
        //遍历成员
        for (int i = 0; i < sourceFields.length; i++) {
            //获取第i个元素
            Field field=sourceFields[i];
            //设置可见性
            field.setAccessible(true);
            //拿到成员名
            String name = field.getName();
            Field targetField=null;
            try {
                targetField = targetClass.getDeclaredField(name);
            } catch (NoSuchFieldException e) {
                //e.printStackTrace();
                continue;
            }
            //复制属性的值
            targetField.setAccessible(true);
            try {
                targetField.set(target,field.get(source));
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
        return target;
    }
//    public static void main(String[] args) {
//        UserVO user1=new UserVO();
//        UserVO user2=new UserVO();
//        user1.setId(1L);
//        user1.setUsername("zhangsan");
//        copy(user1,user2);
//        System.out.println(user2);
//    }

}