公司apns接口私有协议java实现。Base64算法apache下的commons-codec实现有少许问题，最好使用JDK8原生的实现！

Apns.java

private static final String apns(long uid, int type, String alert, long sn) {
        String playload = APNS.newPayload().alertBody(alert).customField("type", type).build();

        int length = 13 + 9 + playload.getBytes(CharsetUtil.UTF_8).length;

        ByteBuf bf = Unpooled.buffer(length);
        bf.writeInt(length)
          .writeByte(1)
          .writeLong(sn)
          .writeLong(uid)
          .writeByte(1)
          .writeBytes(playload.getBytes(CharsetUtil.UTF_8));

        return Base64.getUrlEncoder().encodeToString(bf.array());
        // return Base64Utils.encodeToUrlSafeString(bf.array());
    }
    

pom.xml

<dependency>
    <groupId>com.notnoop.apns</groupId>
    <artifactId>apns</artifactId>
    <version>1.0.0.Beta6</version>
</dependency>
<dependency>
    <groupId>io.netty</groupId>
    <artifactId>netty-all</artifactId>
    <version>4.1.2.Final</version>
</dependency>