Netty + WebSocket 出现异常求解！！！

想写一个基于Netty WebSocket实现聊天的一个小功能，由于环境使然需要使用https的方式，如果使用https那么websocket必须使用wss的方式，我通过jdk自带的keytool工具生成了一个签证，集成之后发现各种报错

public class SSLUtil {

    public static SSLContext createSSLContext(String password) throws Exception {
        KeyStore ks = KeyStore.getInstance("JKS"); /// "JKS"
        InputStream ksInputStream = new SSLUtil().getClass().getClassLoader().getResourceAsStream("nettySSL.jks");
        ks.load(ksInputStream, password.toCharArray());
        //KeyManagerFactory充当基于密钥内容源的密钥管理器的工厂。
        KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());//getDefaultAlgorithm:获取默认的 KeyManagerFactory 算法名称。
        kmf.init(ks, password.toCharArray());
        //SSLContext的实例表示安全套接字协议的实现，它充当用于安全套接字工厂或 SSLEngine 的工厂。
        SSLContext sslContext = SSLContext.getInstance("TLS");
        sslContext.init(kmf.getKeyManagers(), null, null);
        return sslContext;
    }
}

 ws = new WebSocket("wss://localhost:8602/wss")
 .......

访问提示如下异常：

io.netty.handler.codec.DecoderException: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:473)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:281)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
	at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)
Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
	at sun.security.ssl.Alert.createSSLException(Alert.java:131)
	at sun.security.ssl.Alert.createSSLException(Alert.java:117)
	at sun.security.ssl.TransportContext.fatal(TransportContext.java:314)
	at sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:293)
	at sun.security.ssl.TransportContext.dispatch(TransportContext.java:187)
	at sun.security.ssl.SSLTransport.decode(SSLTransport.java:154)
	at sun.security.ssl.SSLEngineImpl.decode(SSLEngineImpl.java:594)
	at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:549)
	at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:413)
	at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:392)
	at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:626)
	at io.netty.handler.ssl.SslHandler$SslEngineType$3.unwrap(SslHandler.java:280)
	at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1332)
	at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1227)
	at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1274)
	at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:503)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:442)
	... 17 more

兄弟，你问题解决了吗？我和你遇到相同的问题