��权限没有,则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存,跨进程需要再加一层缓存:redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>How to deserialize json without property names with jackson library? - Stack Overflow
最新消息:雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客

How to deserialize json without property names with jackson library? - Stack Overflow

programmeradmin3浏览0评论

A webservice call, which is out of my control, returns a json response in this format:

[1737189665,1.0001,2.1123,"some string"]

The json consists of the bare values, i.e. without any property names. I know the property names (timestamp, min, max, message) from the documentation of the webservice.

That json must be mapped into an object of type Result

@Data   // lombok
@Builder  // lombok
public class Result {
  Long timestamp;
  Double min;
  Double max;
  String message;
}

What is the best way to do the mapping with the jackson library? Why jackson? Because my application has already chosen jackson as library to handle json.

I have already a working solution with a custom deserializer, but I am not sure if this is really the best way. Is the CustomDeserializer really necessary?

My solution is to register a custom deserializer with the Result class:

@Data
@Builder
@JsonDeserialize(using = ResultDeserializer.class)
 public class Result {
    // ...
 }

The ResultDeserializer looks like this:

public class ResultDeserializer extends StdDeserializer<Result> {

    // serialVersionId and constructors omitted

    @Override
    public Result deserialize(JsonParser p, DeserializationContext ctx) throws IOException, JacksonException {

        JsonNode node = p.getCodec().readTree(p);
        Iterator<JsonNode> children = node.elements();
        
        return Result.builder()
            .timestamp(children.next().asLong();)
            .min(children.next().asDouble())
            .max(children.next().asDouble())
            .message(children.next().asText())
        .build();
    }
}

The mapping looks like this:

Object[] rawJson = "[1737189665,1.0001,2.1123,\"some string\"]"; // in reality retrieved from webservice

ObjectMapper mapper = new ObjectMapper();
Result result = mapper.convertValue(rawJson, Result.class);
发布评论

评论列表(0)

  1. 暂无评论