HttpConnectionPool

Use the HttpConnectionPool need instantiate PoolConfig and Properties

For example, the following

        /* poolConfig */
        PoolConfig config = new PoolConfig();
        config.setMaxTotal(20);
        config.setMaxIdle(5);
        config.setMaxWaitMillis(1000);
        config.setTestOnBorrow(true);

        /* properties */
        Properties properties = new Properties();
        properties.setProperty("httpUrl", "http://localhost:8888/xxx/xxxx");
        properties.setProperty("httpMethod", "POST");
        properties.setProperty("httpHeader", "Accept:*/*,Content-type:application/json");

        /* connection pool */
        HttpConnectionPool pool = new HttpConnectionPool(config, properties);

        /* pool getConnection */
        HttpURLConnection connection = pool.getConnection();
        
        ...

        /* pool returnConnection */
        pool.returnConnection(connection);

More configs see the Configuration wiki.