Java对象指定部分/全部属性copy工具类

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要将部分属性从一个Java对象复制到另一个对象，可以使用一个实用程序类和一个利用反射复制指定字段的方法。以下是一个示例实现：

public class ObjectCopier {
    public static void copyFields(Object source, Object destination, String... fields) throws IllegalAccessException {
        Class<?> sourceClass = source.getClass();
        Class<?> destinationClass = destination.getClass();

        for (String field : fields) {
            Field sourceField = null;
            try {
                sourceField = sourceClass.getDeclaredField(field);
            } catch (NoSuchFieldException e) {
                // Ignore fields that don't exist in the source object
                continue;
            }
            Field destinationField = null;
            try {
                destinationField = destinationClass.getDeclaredField(field);
            } catch (NoSuchFieldException e) {
                // Ignore fields that don't exist in the destination object
                continue;
            }

            sourceField.setAccessible(true);
            destinationField.setAccessible(true);
            destinationField.set(destination, sourceField.get(source));
        }
    }
}

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测试

@Data
public class User {

    private String warehouseCode;


    private String warehouseName;


    private Integer  deductType;


    private String  deductOrderCode;


    private BigDecimal deductAmount;
}


@Data
public class User2 {

    private String warehouseCode;


    private String warehouseName;

    private Integer  deductType;

    public static void main(String[] args) throws IllegalAccessException {
        User2 user2 = new User2();
        user2.setWarehouseCode("code");
        user2.setWarehouseName("name");
        user2.setDeductType(111);
        User user = new User();
        ObjectCopier.copyFields(user2,user,"warehouseCode","warehouseName");
        System.out.println(user);
    }
}

测试结果

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