org.springframework.data.redis.RedisConnectionFailureException: 
Unable to connect to Redis; 
nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to 127.0.0.1/<unresolved>:6379

完整的項目報錯信息：

org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to 127.0.0.1/<unresolved>:6379
   at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1092)
   at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getConnection(LettuceConnectionFactory.java:1065)
   at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getSharedConnection(LettuceConnectionFactory.java:865)
   at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getConnection(LettuceConnectionFactory.java:340)
   at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:132)
   at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:95)
   at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:82)
   at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:211)
   at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:184)
   at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:95)
   at org.springframework.data.redis.core.DefaultValueOperations.get(DefaultValueOperations.java:53)
   at com.wuyue.travel.service.HotelService.add(HotelService.java:60)
   at com.wuyue.travel.service.HotelService$$FastClassBySpringCGLIB$$577547fe.invoke(<generated>)
   at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
   at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
   at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)
   at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
   at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
   at com.wuyue.travel.service.HotelService$$EnhancerBySpringCGLIB$$af4f4c1f.add(<generated>)
   at com.wuyue.travel.controller.admin.HotelController.add(HotelController.java:65)
   at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
   at java.base/java.lang.reflect.Method.invoke(Method.java:577)
   at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
   at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
   at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800)
   at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
   at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
   at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
   at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
   at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320)
   at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
   at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:74)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
   at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215)
   at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)
   at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
   at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
   at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
   at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
   at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
   at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
   at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
   at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
   at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
   at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
   at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
   at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
   at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
   at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
   at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: io.lettuce.core.RedisConnectionException: Unable to connect to 127.0.0.1/<unresolved>:6379
   at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:78)
   at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:56)
   at io.lettuce.core.AbstractRedisClient.getConnection(AbstractRedisClient.java:234)
   at io.lettuce.core.RedisClient.connect(RedisClient.java:204)
   at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.lambda$getConnection$1(StandaloneConnectionProvider.java:113)
   at java.base/java.util.Optional.orElseGet(Optional.java:364)
   at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.getConnection(StandaloneConnectionProvider.java:113)
   at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1085)
   ... 103 more
Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: /127.0.0.1:6379
   at java.base/sun.nio.ch.Net.pollConnect(Native Method)
   at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:672)
   at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:946)
   at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327)
   at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340)
   at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:636)
   at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:583)
   at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:500)
   at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462)
   at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897)
   at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
   ... 1 more
Caused by: java.net.ConnectException: Connection refused: no further information
   ... 12 more

問題描述：

提示：這里描述項目中遇到的問題：

在某個項目中添加按鈕一直顯示執(zhí)行出錯

一開始想的是代碼問題，于是翻看各層代碼：

首先看頁面：

<script>
    layui.use(['form', 'upload', 'laydate'] ,function(){

        var form = layui.form
            ,$ = layui.jquery
            ,layer = layui.layer
            ,upload = layui.upload
            ,laydate = layui.laydate;

        //日期
        laydate.render({
            elem: '#date'
        });

        //普通圖片上傳
        var uploadInst = upload.render({
            elem: '#test1'
            ,url: '/uploadFile'
            ,before: function(obj){
                //預(yù)讀本地文件示例，不支持ie8
                obj.preview(function(index, file, result){
                    $('#demo1').attr('src', result); //圖片鏈接（base64）
                });
            }
            ,done: function(res){
                //如果上傳失敗
                if(res.code > 0){
                    return layer.msg('上傳失敗');
                }
                //上傳成功
                return layer.msg('上傳成功');
            }
            ,error: function(){
                //演示失敗狀態(tài)，并實現(xiàn)重傳
                var demoText = $('#demoText');
                demoText.html('<span style="color: #FF5722;">上傳失敗</span> <a class="layui-btn layui-btn-xs demo-reload">重試</a>');
                demoText.find('.demo-reload').on('click', function(){
                    uploadInst.upload();
                });
            }
        });

        //監(jiān)聽提交
        form.on('submit(setmyinfo)', function(obj){

            $.ajax({
                type: "POST",
                url: "/hotel",
                data: JSON.stringify(obj.field),
                dataType: "json",
                contentType: "application/json;charset=utf-8",
                success: function(result) {
                    if(result.code == 0) {

                        //登入成功的提示
                        layer.msg(
                            result.message,{
                                icon: 1
                            });
                    } else {
                        layer.msg(result.message, {
                            icon: 5
                        });
                    }
                }
            });

        });

    });
</script>

Controller層代碼

	/**
	 * 增加
	 * @param hotel
	 */
	@ResponseBody
	@RequestMapping(method=RequestMethod.POST)
	public Result add(@RequestBody Hotel hotel){
		hotelService.add(hotel);
		return new Result(true,StatusCode.OK,"增加成功");
	}

Dao層數(shù)據(jù)訪問接口

public interface HotelDao extends JpaRepository<Hotel,String>,JpaSpecificationExecutor<Hotel>{

    List<Hotel> findByAddrLike(String addr);

}

Service層代碼

	/**
	 * 增加
	 * @param hotel
	 */
	public void add(Hotel hotel) {
		hotel.setId( idWorker.nextId()+"" );
		//取到緩存中的文件url
		String fileurl = (String) redisTemplate.opsForValue().get("fileurl");

		hotel.setImg("https://travel031.oss-cn-qingdao.aliyuncs.com/"+fileurl);
		hotelDao.save(hotel);
	}

其實這一路看過來沒發(fā)現(xiàn)啥問題，基本上是誰也不會覺得代碼有問題