2025年java map转object_json对象转map集合

编程汇总 • 2025-04-10 07:01 • 阅读 82

FindArchiveDto findArchiveDto = new FindArchiveDto();

findArchiveDto.setContractStatus("降龙");

findArchiveDto.setCustName("明华");

findArchiveDto.setDepartmentName("赵无极");

fastjson转换方法

//Object转Map

Map map = JSONObject.parseObject(JSONObject.toJSONString(findArchiveDto), Map.class);

Map map = JSONObject.parseObject(JSON.toJSONString(findArchiveDto));

//Map转Object

FindArchiveDto findArchiveDto1 = JSON.parseObject(JSON.toJSONString(map), FindArchiveDto.class);

FindArchiveDto findArchiveDto2 = JSONObject.toJavaObject(JSON.toJSONString(map), FindArchiveDto.class);

jackson的转换

ObjectMapper mapper = new ObjectMapper();

//对象转map

Map m = mapper.readValue(mapper.writeValueAsString(findArchiveDto), Map.class);

//map转对象

FindArchiveDto dto = mapper.readValue(mapper.writeValueAsString(m), FindArchiveDto.class);

还可以用org.apache.commons.beanutils.BeanMap进行转换

Map map = new org.apache.commons.beanutils.BeanMap(findArchiveDto);

还可以用org.apache.commons.beanutils.BeanUtils将map转为对象

BeanUtils.populate(findArchiveDto, map);

//Object转Map

public static Map getObjectToMap(Object obj) throws IllegalAccessException {

    Map map = new LinkedHashMap();

    Class clazz = obj.getClass();

    System.out.println(clazz);

    for (Field field : clazz.getDeclaredFields()) {

        field.setAccessible(true);

        String fieldName = field.getName();

        Object value = field.get(obj);

        if (value == null){

            value = "";

        }

        map.put(fieldName, value);

    }

    return map;

}

//Map转Object

public static Object mapToObject(Map map, Class beanClass) throws Exception {

    if (map == null)

        return null;

    Object obj = beanClass.newInstance();

    Field[] fields = obj.getClass().getDeclaredFields();

    for (Field field : fields) {

        int mod = field.getModifiers();

        if (Modifier.isStatic(mod) || Modifier.isFinal(mod)) {

            continue;

        }

        field.setAccessible(true);

        if (map.containsKey(field.getName())) {

            field.set(obj, map.get(field.getName()));

        }

    }

    return obj;

}

2025年java map转object_json对象转map集合

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