Java——okhttp3调用API接口

你的名字 2023-07-09 03:26 35阅读 0赞

##### Java——okhttp3调用API接口 [官方网站][Link 1] #####

本篇以java调用有课API接口为例，签名需要以map的key进行字典排序之后进行sha1加密算法后得出。有课API文档地址：[https://postman.mudu.tv/?version=latest][https_postman.mudu.tv_version_latest]

##### 字典排序 #####

以下提供的两种方式都可以进行字典排序：  
**方式一：**

// 对map中的数据以key进行字典排序
     public static String sortMapKey(Map<String, String> map) {
        
         // 将map放入到List中
         List<Map.Entry<String, String>> keys = new ArrayList<>(map.entrySet());
         // 排序
         keys.sort(Comparator.comparing(o -> (o.getKey())));
         StringBuffer buf = new StringBuffer("{"); // 循环构建键值对字符串
         for (Map.Entry<String, String> item : keys) {
        
             if (StringUtils.isNotBlank(item.getKey())) {
        
                 String key = item.getKey();
                 String val = item.getValue();
                 buf.append("\"").append(key).append("\"").append(":").append("\"").append(val).append("\"").append(",");
             }
         }
         String buff = buf.toString();
         if (!buff.isEmpty()) {
        
             buff = buff.substring(0, buff.length() - 1)+"}";
         }
         return buff;
     }

**方式二：**

public static String sortMapKey1(Map<String, String> map) {
        
    	Collection<String> keyset = map.keySet();
    	List<String> list = new ArrayList<String>(keyset);
    	Collections.sort(list);
    	JSONObject jsonObject = new JSONObject(true);
    	for (int i = 0; i < list.size(); i++) {
        
    		jsonObject.put(list.get(i).toString(), map.get(list.get(i)));
    	}
    	return jsonObject.toJSONString();
    }

##### sha1算法算出签名 #####

/**
     * SHA1安全加密算法   
     * 
     * @param maps
     * @return
     * @throws DigestException
     */
    public static String shaSign(Map<String, String> maps) throws DigestException {
        
    	// 获取信息摘要-参数排序后字符串
    	String decrypt = sortMapKey(maps);
    	System.out.println(decrypt);
    	try {
        
    		// 指定sha1算法    
    		MessageDigest digest = MessageDigest.getInstance("SHA-1");
    		// Updates the digest using the specified array of bytes.
    		digest.update(decrypt.getBytes());
    		// 获取字节数组      
    		byte messageDigest[] = digest.digest();
    		// CreateHexString       
    		StringBuffer hexString = new StringBuffer();
    		// 字节数组转换为十六进制数       
    		for (int i = 0; i < messageDigest.length; i++) {
        
    			String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
    			if (shaHex.length() < 2) {
        
    				hexString.append(0);
    			}
    			hexString.append(shaHex);
    		}
    		return hexString.toString();
    	} catch (NoSuchAlgorithmException e) {
        
    		e.printStackTrace();
    		throw new DigestException("签名错误！");
    	}
    }

##### 生成十位时间戳 #####

public static String getTimeStamp() {
        
    	return String.valueOf(System.currentTimeMillis() / 1000);
    }

##### 示例 #####

**以同步post请求调用公众观看-登录接口:**

/**
     * 以同步post请求调用公众观看-登录接口
     * 
     * @throws DigestException
     */
    static void publicLogin() throws DigestException {
        
    	HashMap<String, String> map = new HashMap<>();
    	map.put("access_key", "填自己的access_key");
    	map.put("secret_key", "填自己的secret_key");
    	map.put("id", "jnwpCAqFiI8KeFCovh7U7fA2pPljmDqz");
    	map.put("name", "test");
    	map.put("timestamp", getTimeStamp());
    	//得到签名
    	String sign = shaSign(map);
    	OkHttpClient okHttpClient = new OkHttpClient();
    	// 参数
    	RequestBody body = new FormBody.Builder().add("name", map.get("name")).add("id", map.get("id")).build();
    	// post请求
    	Request request = new Request.Builder()
    			.url("http://youke.mudu.tv/Index.php?c=session&a=anonymousLogin&timestamp=" + map.get("timestamp")
    					+ "&access_key=" + map.get("access_key") + "&sign=" + sign)
    			.post(body).build();
    	Response response = null;
    	try {
        
    		// execute()方法表示同步请求，如需异步请求调用enqueue()方法
    		response = okHttpClient.newCall(request).execute();
    		String str = response.body().string();
    		JSONObject json = JSONObject.parseObject(str);
    		//调用公开观看-token登录跳转观看页
    		publicLoginDetail(json.getString("data"));
    	} catch (IOException e) {
        
    		e.printStackTrace();
    	}
    }

**以同步get请求调用公开观看-token登录跳转观看页：**

/**
     *  以同步get请求调用公开观看-token登录跳转观看页
     * 
     * @param audience_token
     * @throws DigestException
     */
    static void publicLoginDetail(String audience_token) throws DigestException {
        
    	HashMap<String, String> map = new HashMap<>();
    	map.put("access_key", "填自己的access_key");
    	map.put("secret_key", "填自己的secret_key");
    	map.put("id", "jnwpCAqFiI8KeFCovh7U7fA2pPljmDqz");
    	map.put("audience_token", audience_token);
    	map.put("timestamp", getTimeStamp());
    	//得到签名
    	String sign = shaSign(map);
    	OkHttpClient okHttpClient = new OkHttpClient();
    	// get请求
    	Request request = new Request.Builder().url("http://youke.mudu.tv/Index.php?c=session&a=sessionLogin&timestamp="
    			+ map.get("timestamp") + "&access_key=" + map.get("access_key") + "&sign=" + sign + "&id="
    			+ map.get("id") + "&audience_token=" + map.get("audience_token")).get().build();
    	System.out.println(request);
    	Response response = null;
    	try {
        
    		response = okHttpClient.newCall(request).execute();
    		String str = response.body().string();
    		System.out.println(str);
    	} catch (IOException e) {
        
    		e.printStackTrace();
    	}
    }

[Link 1]: https://square.github.io/okhttp/
[https_postman.mudu.tv_version_latest]: https://postman.mudu.tv/?version=latest