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Java實(shí)現(xiàn)京東聯(lián)盟API數(shù)據(jù)獲取功能

更新時(shí)間：2022年07月25日 10:53:35 作者：予風(fēng)北

這篇文章介紹了Java獲取京東聯(lián)盟API數(shù)據(jù)的方法，文中通過(guò)示例代碼介紹的非常詳細(xì)。對(duì)大家的學(xué)習(xí)或工作具有一定的參考借鑒價(jià)值，需要的朋友可以參考下

一：api參數(shù)

京東聯(lián)盟提供了一個(gè)SDK的包下載好加入到項(xiàng)目中，SDK封裝了api的調(diào)用方法，代碼就是每個(gè)api的調(diào)用實(shí)例如下把申請(qǐng)的四個(gè)參數(shù)填好就行。

String SERVER_URL = "https://api.jd.com/routerjson";
String accessToken = null;
String appKey = "";
String appSecret = "";
JdClient client=new DefaultJdClient(SERVER_URL,accessToken,appKey,appSecret);
UnionOpenGoodsJingfenQueryRequest request=new UnionOpenGoodsJingfenQueryRequest();
JFGoodsReq goodsReq=new JFGoodsReq();
goodsReq.setEliteId(1);
request.setGoodsReq(goodsReq);
request.setVersion("1.0");
UnionOpenGoodsJingfenQueryResponse response=client.execute(request);
System.out.println(response);

加入倆個(gè)依賴(lài)。

<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.2</version>
</dependency>
 
<dependency>
     <groupId>org.codehaus.jackson</groupId>
     <artifactId>jackson-core-asl</artifactId>
     <version>1.9.2</version>
</dependency>

是不是按照我上面的來(lái)System.out.println(response)，沒(méi)有拿到數(shù)據(jù)，就是一串包名 com.jd.open.api.sdk.response.kplunion.UnionOpenGoodsJingfenQueryResponse@1df82230不要慌，因?yàn)槭窃贘ava中集合是打印不出來(lái)的，只需要轉(zhuǎn)化為string就能出來(lái)數(shù)據(jù)。這樣String json = JSON.toJSONString(response)，就出來(lái)數(shù)據(jù)了咯。

二：在一個(gè)util里寫(xiě)一個(gè)httpclient方法

    public static String doGet(String url) {
        // 創(chuàng)建Httpclient對(duì)象
        CloseableHttpClient httpclient = HttpClients.createDefault();
        String resultString = "";
        CloseableHttpResponse response = null;
        try {
            // 創(chuàng)建uri
            URIBuilder builder = new URIBuilder(url);
            URI uri = builder.build();
            // 創(chuàng)建http GET請(qǐng)求
            HttpGet httpGet = new HttpGet(uri);
            // 執(zhí)行請(qǐng)求
            response = httpclient.execute(httpGet);
            // 判斷返回狀態(tài)是否為200
            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return resultString;
    }

business是入?yún)?shù)前端傳入的就必須是網(wǎng)址格式先調(diào)用getBusiness，在傳參，method是地址，例jd.union.open.activity.query我用的是一個(gè)URL拼接的方法。詳情https://jos.jd.com/commontools?id=2，appKey，appSecret寫(xiě)好。

private static String appKey="";
private static String appSecret="";

    public String getGoodsJingfenQuery(String business,String method) {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//設(shè)置日期格式
        String date = df.format(new Date());// new Date()為獲取當(dāng)前系統(tǒng)時(shí)間，也可使用當(dāng)前時(shí)間戳
        String rc =getBusinessnot(business);//把入?yún)?shù)轉(zhuǎn)化成json格式
        String sj =getTime(date);//把時(shí)間轉(zhuǎn)化網(wǎng)址格式
        String str =appSecret+"360buy_param_json"+rc+"app_key"+appKey+"method"+method+"sign_methodmd5timestamp"+date+"v1.0"+appSecret;
        String sign=MD5(str);//獲取簽名，MD5 32位的加密
        String url="https://api.jd.com/routerjson?360buy_param_json="+newbusiness+"&app_key="+appKey+"&method="+method+"&sign_method=md5&timestamp="+sj+"&v=1.0&sign="+sign;
        return httpClientUtil.doGet(url,null);
    }

里面一些方法。

    public String getBusiness(String business) {
        String a = business.replace("{","%7B");
        String b = a.replace(":","%3A");
        String c = b.replace("}","%7D");
        return c.replace("\"","%22");
    }
 
    public String getBusinessnot(String business) {
        String a = business.replace("%7B","{");
        String b = a.replace("%3A",":");
        String c = b.replace("%7D","}");
        return c.replace("%22","\"");
    }
 
    public String getTime(String time) {
        String a = time.replace(" ","+");
        return a.replace(":","%3A");
    }
 
    public String getMD5(String str) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            return new BigInteger(1, md.digest()).toString(16);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
 
    public static String MD5(String s) {
        char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
        try {
            byte[] btInput = s.getBytes();
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            mdInst.update(btInput);
            byte[] md = mdInst.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

這樣就拿到了京東聯(lián)盟的數(shù)據(jù)。

有一個(gè)毒點(diǎn)，我用帶參的httpclient方法map<string,string> param =new treemap<>();，而不是寫(xiě)一長(zhǎng)串url，列如param.put("360buy_param_json","{\"goodsReq\":{\"eliteId\":\"1\"}}");我試了傳過(guò)去報(bào)json轉(zhuǎn)化異常，不知道咋解決。

到此這篇關(guān)于Java獲取京東聯(lián)盟API數(shù)據(jù)的文章就介紹到這了。希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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