今日问题 小记之

工作中我们有时会遇到map转换xml的需求 今天特意记下
话不多说 直接上代码 使用递归的思路

public static String map2Xml(Map<String, Object> paramMap) {
        synchronized (MapUtil.class) {
            StringBuilder strBuilder = new StringBuilder();
            strBuilder.append("<?xml version='1.0' encoding='UTF-8' ?>\n");
            strBuilder.append("<REQ_PARAM>");
            Set<String> objSet = paramMap.keySet();
            for (String key : objSet) {
                if (key == null) {
                    continue;
                }
                strBuilder.append("\n");
                strBuilder.append("<").append(key).append(">\n");
                Object value = paramMap.get(key);
                strBuilder.append(convert(value));
                strBuilder.append("</").append(key).append(">");
            }
            strBuilder.append("\n</REQ_PARAM>");
            return strBuilder.toString();
        }
    }

    public static String convert(Map map) {
        StringBuilder strBuilder = new StringBuilder();
        for (Object o : map.keySet()) {
            strBuilder.append("<").append(o).append(">");
            strBuilder.append(convert(map.get(o)));
            strBuilder.append("</").append(o).append(">\n");
        }
        return strBuilder.toString();
    }

    public static String convert(Collection<?> objects) {
        StringBuilder strBuilder = new StringBuilder("\n");
        for (Object obj : objects) {
            strBuilder.append("<").append(obj).append(">");
            strBuilder.append(convert(obj));
            strBuilder.append("</").append(obj).append(">\n");
        }
        return strBuilder.toString();
    }

    /**
     * 描述：递归进行转换
     * Created by zjw on 2018-12-11 11:21:37
     *
     * @param object
     * @return String
     */
    public static String convert(Object object) {
        if (object instanceof Map) {
            return convert((Map)object);
        }
        if (object instanceof Collection) {
            return convert((Collection<?>) object);
        }
        StringBuilder strBuilder = new StringBuilder();
        if (isObject(object)) {
            Class<?> clz = object.getClass();
            Field[] fields = clz.getDeclaredFields();

            for (Field field : fields) {
                field.setAccessible(true);
                String fieldName = field.getName();
                Object value;
                try {
                    value = field.get(object);
                } catch (IllegalArgumentException | IllegalAccessException e) {
                    continue;
                }
                strBuilder.append("<").append(fieldName).append("\">");
                if (isObject(value)) {
                    strBuilder.append(convert(value));
                } else {
                    strBuilder.append(value.toString());
                }
                strBuilder.append("</").append(fieldName).append(">");
            }
        } else if (object == null) {
            strBuilder.append("null");
        } else {
            strBuilder.append(object.toString());
        }
        return strBuilder.toString();
    }

    /**
     * 描述：判断是否是对象
     * Created by zjw on 2018-12-11 11:20:48
     *
     * @param obj
     * @return boolean
     */
    private static boolean isObject(Object obj) {
        if (obj == null) return false;
        if (obj instanceof String) return false;
        if (obj instanceof Integer) return false;
        if (obj instanceof Double) return false;
        if (obj instanceof Float) return false;
        if (obj instanceof Byte) return false;
        if (obj instanceof Long) return false;
        if (obj instanceof Character) return false;
        if (obj instanceof Short) return false;
        return !(obj instanceof Boolean);
    }

    public static void main(String[] args) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        Map<String, Object> reqParamMap = new HashMap<>();
        Map<String, Object> pubInfoMap = new HashMap<>();
        Map<String, Object> busInfoMap = new HashMap<>();
        reqParamMap.put("PUB_INFO", pubInfoMap);
        reqParamMap.put("BUSI_INFO", busInfoMap);
        pubInfoMap.put("REQ_TIME", sdf.format(new Date()));
        pubInfoMap.put("CHANNLE_ID", "789");
        pubInfoMap.put("REGION_ID", "123");
        pubInfoMap.put("REQ_SERIAL_NO", "20181211");
        pubInfoMap.put("PROCESS_CODE", "TokenCheck");
        busInfoMap.put("TOKEN", "testToken");
        // busInfoMap.put("list", Arrays.asList("abc", "def"));
        System.out.println(GsonUtil.toJson(reqParamMap));
        System.out.println(MapUtil.map2Xml(reqParamMap));
    }