在做工地是数据大屏项目的时候，我们采用的技术是微服务，需要springboot与redis、zookeeper、dubbo等相结合
在开发过程中遇到了空指针异常，报错信息具体如下：
2022-03-02 13:12:53.530 ERROR 71824 --- [nio-8090-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException: null at com.qf.bigdata.view.web.service.impl.WorkerTotalServiceImpl.workerTotal(WorkerTotalServiceImpl.java:21) ~[classes/:na] at com.qf.bigdata.view.web.controller.api.WorkerController.getWorkerTotal(WorkerController.java:19) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_301] ......解决 step01
服务提供者的@Service是来自dubbo的Service，而不是springframework中的
step02服务消费者的@Reference是来自dubbo的
step03启动类要记得加@EnableDubbo
---------小插曲----------------------当上述步骤全都做完之后，我发现报了一个新错，此时我很开心那，因为上面的问题就算是解决了，下面是新的错误信息
org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to 192.168.100.107:6379 at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.translateException(LettuceConnectionFactory.java:1534) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.getConnection(LettuceConnectionFactory.java:1442) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1228) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getConnection(LettuceConnectionFactory.java:1211) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getSharedConnection(LettuceConnectionFactory.java:975) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getConnection(LettuceConnectionFactory.java:360) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:134) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:97) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:84) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:215) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:188) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:96) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.DefaultValueOperations.get(DefaultValueOperations.java:53) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at com.qf.data.view.facade.service.worker.WorkerFacadeImpl.getWorkerTotal(WorkerFacadeImpl.java:24) ~[classes/:na] at com.alibaba.dubbo.common.bytecode.Wrapper3.invokeMethod(Wrapper3.java) ~[dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:47) ~[dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:76) ~[dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.config.invoker.DelegateProvidermetaDataInvoker.invoke(DelegateProvidermetaDataInvoker.java:52) ~[dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56) ~[dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:62) ~[dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:131) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:103) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:96) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:172) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51) [dubbo-2.6.2.jar:2.6.2] at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:80) [dubbo-2.6.2.jar:2.6.2] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_301] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_301] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_301] Caused by: io.lettuce.core.RedisConnectionException: Unable to connect to 192.168.100.107:6379 at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:78) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:56) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.AbstractRedisClient.getConnection(AbstractRedisClient.java:242) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.RedisClient.connect(RedisClient.java:206) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.lambda$getConnection$1(StandaloneConnectionProvider.java:115) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at java.util.Optional.orElseGet(Optional.java:267) ~[na:1.8.0_301] at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.getConnection(StandaloneConnectionProvider.java:115) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.getConnection(LettuceConnectionFactory.java:1440) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] ... 41 common frames omitted Caused by: io.lettuce.core.RedisCommandExecutionException: ERR Client sent AUTH, but no password is set at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:135) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:108) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:118) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:109) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:680) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:640) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:591) ~[lettuce-core-5.3.5.RELEASE.jar:5.3.5.RELEASE] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.55.Final.jar:4.1.55.Final] at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.55.Final.jar:4.1.55.Final] at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.55.Final.jar:4.1.55.Final] ... 1 common frames omittedstep04：
yml配置文件中的密码需要与Redis.conf中设置的密码一致，若没有设置密码，就别写密码了
我的方法就是不设置密码，如下图
现在程序可以继续开发啦，问题已解决~
现在我们用一个数据去测试一下
