Java-Redis JdkSerializationRedisSerializer和StringRedisSerializer

在將redis中存儲的數據進行減一操作時出現：

io.lettuce.core.RedisCommandExecutionException: ERR value is not a valid float
    at io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:118) ~[lettuce-core-5.0.4.RELEASE.jar:na]
    at io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:109) ~[lettuce-core-5.0.4.RELEASE.jar:na]
    at io.lettuce.core.protocol.CommandWrapper.complete(CommandWrapper.java:57) ~[lettuce-core-5.0.4.RELEASE.jar:na]
    at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:598) ~[lettuce-core-5.0.4.RELEASE.jar:na]
    at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:556) ~[lettuce-core-5.0.4.RELEASE.jar:na]
    at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:508) ~[lettuce-core-5.0.4.RELEASE.jar:na]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) ~[netty-transport-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) ~[netty-common-4.1.24.Final.jar:4.1.24.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.24.Final.jar:4.1.24.Final]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]

查看redis中存儲的數據：

 

發現是RedisConfig中的序列化配置問題，將原本的

redisTemplate.setValueSerializer(new JdkSerializationRedisSerializer());

改為

redisTemplate.setValueSerializer(new StringRedisSerializer());

存儲到redis中的數據就會以字符串的格式存儲，在進行數據運算時就會轉換為對應的數值類型。