redis拒绝连接

# 具体遇到的问题
我linux的redis打开了，但是还是没有办法连接到
# 报错信息的截图

Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: /127.0.0.1:6379

Caused by: java.net.ConnectException: Connection refused: no further information

at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.8.0_221]

at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[?:1.8.0_221]

at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330) ~[netty-transport-4.1.43.Final.jar:4.1.43.Final]

at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334) ~[netty-transport-4.1.43.Final.jar:4.1.43.Final]

at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:688) ~[netty-transport-4.1.43.Final.jar:4.1.43.Final]

at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635) ~[netty-transport-4.1.43.Final.jar:4.1.43.Final]

at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552) ~[netty-transport-4.1.43.Final.jar:4.1.43.Final]

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514) ~[netty-transport-4.1.43.Final.jar:4.1.43.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050) ~[netty-common-4.1.43.Final.jar:4.1.43.Final]

at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.43.Final.jar:4.1.43.Final]

at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.43.Final.jar:4.1.43.Final]

... 1 more

# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

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server.port = 8083

spring.datasource.name=imooc_mall_local_datasource
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/imooc_mall_local?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSl=false&serverTimezone=Asia/Shanghai
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=19990116

mybatis.mapper-locations=classpath:mappers/*.xml

spring.redis.host = 127.0.0.1
spring.redis.port = 6379
spring.redis.password = 19990116a

#上传文件的路径，根据部署情况，自行修改
file.upload.dir = C:/licheng/intellij IDEA/imooc-mall2-prepare-static/
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package com.imooc.mall.config;

import java.time.Duration;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;

/**
* 描述：     缓存的配置类
*/
@Configuration
@EnableCaching
public class CachingConfig {

    @Bean
    public RedisCacheManager redisCacheManager(RedisConnectionFactory connectionFactory) {

        RedisCacheWriter redisCacheWriter = RedisCacheWriter
                .lockingRedisCacheWriter(connectionFactory);
        RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
        cacheConfiguration = cacheConfiguration.entryTtl(Duration.ofSeconds(30));

        RedisCacheManager redisCacheManager = new RedisCacheManager(redisCacheWriter,
                cacheConfiguration);
        return redisCacheManager;
    }
}
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package com.imooc.mall.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.imooc.mall.common.ApiRestResponse;
import com.imooc.mall.exception.ImoocMallException;
import com.imooc.mall.exception.ImoocMallExceptionEnum;
import com.imooc.mall.model.dao.CategoryMapper;
import com.imooc.mall.model.pojo.Category;
import com.imooc.mall.model.request.AddCategoryReq;
import com.imooc.mall.service.CategoryService;
import com.imooc.mall.vo.CategoryVo;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.util.ArrayList;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    CategoryMapper categoryMapper;

    @Override
    public void add(AddCategoryReq addCategoryReq) {
        Category category = new Category();
        BeanUtils.copyProperties(addCategoryReq, category);
        Category categoryOld = categoryMapper.selectByName(addCategoryReq.getName());
        if (categoryOld != null) {
            throw new ImoocMallException(ImoocMallExceptionEnum.NAME_EXISTED);
        }
        int count = categoryMapper.insertSelective(category);
        if (count == 0) {
            throw new ImoocMallException(ImoocMallExceptionEnum.CREATE_FAILED);
        }
    }

    @Override
    public void update(Category updateCategory) {
        if (updateCategory.getName() != null) {
            Category categoryOld = categoryMapper.selectByName(updateCategory.getName());
            if (categoryOld != null && !categoryOld.getId().equals(updateCategory.getId())) {
                throw new ImoocMallException(ImoocMallExceptionEnum.NAME_EXISTED);
            }
        }
        int count = categoryMapper.updateByPrimaryKeySelective(updateCategory);
        if (count == 0) {
            throw new ImoocMallException(ImoocMallExceptionEnum.UPDATE_FAILED);
        }
    }

    @Override
    public void delete(Integer id) {
        Category categoryOld = categoryMapper.selectByPrimaryKey(id);
        //找不到记录，无法删除，删除失败。
        if (categoryOld == null) {
            throw new ImoocMallException(ImoocMallExceptionEnum.DELETE_FAILED);
        }
        int count = categoryMapper.deleteByPrimaryKey(id);
        if (count == 0) {
            throw new ImoocMallException(ImoocMallExceptionEnum.DELETE_FAILED);
        }
    }

    @Override
    public PageInfo listForAdmin(Integer pageNum, Integer pageSize) {
        PageHelper.startPage(pageNum, pageSize, "type, order_num");
        List<Category> categoryList = categoryMapper.selectList();
        PageInfo pageInfo = new PageInfo(categoryList);
        return pageInfo;
    }

    @Override
    @Cacheable(value = "listCategoryForCustomer")
    public List<CategoryVo> listCategoryForCustomer(Integer parentId){
        ArrayList<CategoryVo> categoryVoArrayList = new ArrayList<>();
        recursivelyFindCategories(categoryVoArrayList, parentId);
        System.out.println("categoryVoList:" + categoryVoArrayList);
        return categoryVoArrayList;
    }

    private void recursivelyFindCategories(List<CategoryVo> categoryVoList, Integer parentId) {
        List<Category> categoryList = categoryMapper.selectCategoriesByParentId(parentId);
        if(!CollectionUtils.isEmpty(categoryList)){
            for (int i = 0; i < categoryList.size(); i++) {
                Category category = categoryList.get(i);
                CategoryVo categoryVO = new CategoryVo();
                BeanUtils.copyProperties(category, categoryVO);
                categoryVoList.add(categoryVO);
                recursivelyFindCategories(categoryVO.getChildCategory(), categoryVO.getId());
            }
        }
    }
}
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慕仰7036876 2020-10-18

源自：Spring Boot电商项目 5-11 利用Redis缓存加速响应

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2回答

好帮手慕阿慧回答被采纳获得+3积分 2020-10-19 11:02:16

同学你好，

1、建议同学检查一下ip和端口号是否正确。

2、建议同学在电脑上安装redis，连接本地redis试试。

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好帮手慕阿慧 2020-10-18 17:53:03

同学你好，同学项目中redis连接的是127.0.0.1，这是连接本机的Redis。同学应该将spring.redis.host值改为Linux的ip地址。

如下：

建议同学关闭Linux的防火墙，在linux中执行如下命名：

1	`systemctl stop firewalld.service`

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提问者慕仰7036876 #1

我将ip改为了192.168.139.128，并将防火墙关闭，但是还是显示连接超时。不知道怎么解决，请老师指教。 ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.139.128 netmask 255.255.255.0 broadcast 192.168.139.255 inet6 fe80::20c:29ff:fe30:20cc prefixlen 64 scopeid 0x20<link> ether 00:0c:29:30:20:cc txqueuelen 1000 (Ethernet) RX packets 23517 bytes 33507831 (31.9 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 3784 bytes 258507 (252.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

2020-10-18 21:15:33