JAVA中将对象转为Map类型

之前讲过将Map转为JAVA对象的文章，那么问题来了，如果要把JAVA对象转为Map，又该怎么操作呢？
这里亲测了2个方法可行，但目前这2个方法都是基于简单JAVA Bean的情况（即Bean中不能嵌套非基本类型的对象）。

１.通过Introspector来实现

public static Map<String, Object> objectToMap1(Object obj) {
    if (obj == null) {
        return null;
    }
 
    Map<String, Object> map = new HashMap<String, Object>();
    try {
        BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
        for (PropertyDescriptor property : propertyDescriptors) {
            String key = property.getName();
            if (key.compareToIgnoreCase("class") == 0) {
                continue;
            }
            Method getter = property.getReadMethod();
            Object value = getter != null ? getter.invoke(obj) : null;
            map.put(key, value);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
     
    return map;
}

　　
２.通过com.alibaba.fastjson.JSON来实现

    @SuppressWarnings("unchecked")
    public static Map<String, Object> objectToMap2(Object obj) {
        
        return JSON.parseObject(JSON.toJSONString(obj), Map.class);
    }

以下是测试过程：

public static void main(String[] args) {
    SingleWithdrawCallBackMessage message = new SingleWithdrawCallBackMessage();
    message.setAcqSerialNo(2017080100000999L);
    message.setBankNo("111111111111112");
    message.setErrorMessage("");
    message.setFundPayNo("1111111111111112");
    message.setOrderTime("2017-08-01 12:00:00");
    message.setOutOrderNo("2017080100000001");
    message.setPoundageAmount(0L);
    message.setStatus(SingleWithdrawStatus.SINGLE_WITHDRAW_SUCCESS.getCode());
    message.setWithdrawAmount(500L);
     
    Map<String, Object> map = null;
    map = objectToMap1(message);
    System.out.println(map);
     
    Map<String, Object> map2 = objectToMap2(message);
    System.out.println(map2);
}

　　
输出结果：
{fundPayNo=1111111111111112, poundageAmount=0, orderTime=2017-08-01 12:00:00, bankNo=111111111111112, errorMessage=, acqSerialNo=2017080100000999, withdrawAmount=500, outOrderNo=2017080100000001, status=03}

{fundPayNo=1111111111111112, poundageAmount=0, orderTime=2017-08-01 12:00:00, bankNo=111111111111112, errorMessage=, acqSerialNo=2017080100000999, withdrawAmount=500, outOrderNo=2017080100000001, status=03}