Java对象指定部分/全部属性copy工具类

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));

        }

    }

}

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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