Orient DB - 使用带链接的Java将链接数据存储到Orient DB中

时间:2015-03-30 07:03:00

标签: java json hashmap orientdb

我正在使用的是从Orient db(服务器)获取数据容器并将其存储在本地方向数据库中,然后在程序的后期使用它。

我有以下jsonObject,它是从服务器方面db:

获得的
{
        "@type": "d",
        "@rid": "#95:0",
        "@version": 3,
        "@class": "demo1_OnlineShopping",
        "product": [
            {
                "@type": "d",
                "@rid": "#97:0",
                "@version": 3,
                "@class": "demo1_MobilePhone",
                "operatingSystem": "Android",
                "condition": "",
                "minPrice": "100",
                "maxPrice": "500",
                "keyword": "Galaxy S5",
                "brand": "Samsung"
            },
            {
                "@type": "d",
                "@rid": "#97:3",
                "@version": 1,
                "@class": "demo1_MobilePhone",
                "operatingSystem": "Android",
                "condition": null,
                "minPrice": "5",
                "maxPrice": "300",
                "keyword": "M8",
                "brand": "HTC"
            }
        ],
        "user": {
            "@type": "d",
            "@rid": "#100:0",
            "@version": 1,
            "@class": "demo1_User",
            "password": "jamesgillespy@suremail.info",
            "email": "1qaz2wsx@"
        },
        "maxAllowance": "350",
        "cart": null,
        "lookingFor": "Mobile Phone",
        "@fieldTypes": "product=z"
    }

我使用下面的代码将其转换为hashmap,以将其存储在本地db:

Map<String, Object> map = new HashMap<>();
            ObjectMapper mapper = new ObjectMapper();
            map = mapper.readValue(jsonString, new TypeReference<HashMap<String, Object>>(){});

然后使用以下代码将其存储到本地东方数据库中:

ODocument doc = new ODocument("Person");
        for(Entry<String, Object> entry : hashmap.entrySet()){
            doc.field( entry.getKey(), entry.getValue());
        }
        doc.save();

我的第一个问题是,它不允许存储以@ like&#34; @ type&#34;,&#34; @ class&#34;它会引发异常。当我删除它们时它会起作用。然后出现另一个问题,那些没有在本地数据库中链接。它存储为一个数据容器,其中必须存在与多个数据容器的链接。我认为这是因为&#34; @ class&#34;不在那里。并且在插入时手动创建数据库名称(Person)似乎是错误的。任何链接或代码都会有所帮助。提前谢谢。

0 个答案:

没有答案
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