SpringBoot集成Redis

[12.1 配置文件](#12.1 配置文件)
[12.2 防火墙](#12.2 防火墙)
[12.3 Jedis(一般不用了，了解即可)](#12.3 Jedis(一般不用了，了解即可))
[12.4 Lettuce](#12.4 Lettuce)
[12.5 Redis Template(推荐)](#12.5 Redis Template(推荐))
- 1.连接单机
- - 1.改pom
  - 2.写YML
  - 3.业务类
  - - 3.1配置类
    - [3.2 service](#3.2 service)
    - [3.3 controller](#3.3 controller)
    - 测试
    - 序列化问题
- 2.连接集群

12.1 配置文件

redis.conf配置文件，改完后确保生效，记得重启，记得重启

默认daemonize no 改为 daemonize yes
- 默认protected-mode yes 改为 protected-mode no
- 默认bind 127.0.0.1 改为直接注释掉(默认bind 127.0.0.1只能本机访问)或改成本机IP地址，否则影响远程IP连接
- 添加redis密码改为 requirepass 你自己设置的密码

12.2 防火墙

java 复制代码

启动： systemctl start firewalld
关闭： systemctl stop firewalld
查看状态： systemctl status firewalld 
开机禁用  ： systemctl disable firewalld
开机启用  ： systemctl enable firewalld    
添加 ：firewall-cmd --zone=public --add-port=80/tcp --permanent    （--permanent永久生效，没有此参数重启后失效）
重新载入： firewall-cmd --reload
查看： firewall-cmd --zone= public --query-port=80/tcp
删除： firewall-cmd --zone= public --remove-port=80/tcp --permanent

12.3 Jedis(一般不用了，了解即可)

1.介绍

Jedis Client 是Redis 官网推荐的一个面向 Java 客户端，库文件实现了对各类API进行封装调用

2.步骤

建Moudle redis_7_study
改POM

java 复制代码

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.atguigu.redis7</groupId>
    <artifactId>redis7_study</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.10</version>
        <relativePath/>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.16.18</lombok.version>
    </properties>

    <dependencies>
        <!--SpringBoot通用依赖模块-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--jedis-->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>4.3.1</version>
        </dependency>
        <!--通用基础配置-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3.写YML

java 复制代码

server.port=7777

spring.application.name=redis7_study

4.主启动

java 复制代码

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Redis7Study01Application {

    public static void main(String[] args) {
        SpringApplication.run(Redis7Study01Application.class, args);
    }
}

5.业务类

java 复制代码

import redis.clients.jedis.Jedis;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;


public class JedisDemo {
    public static void main(String[] args) {
        // 1 connection 连接，通过指定ip和端口号
        Jedis jedis = new Jedis("192.168.238.111", 6379);

        // 2 指定访问服务器密码
        jedis.auth("111111");

        //  3 获得了Jedis客户端，可以像jdbc一样访问redis
        System.out.println(jedis.ping());

        // keys
        Set<String> keys = jedis.keys("*");
        System.out.println(keys);

        // string
        jedis.set("k3","hello-jedis");
        System.out.println(jedis.get("k3"));
        System.out.println(jedis.ttl("k3"));

        // list
        jedis.lpush("list","11","22","33");
        List<String> list = jedis.lrange("list", 0, -1);
        for (String s : list) {
            System.out.println(s);
        }
        System.out.println(jedis.rpop("list"));
        System.out.println(jedis.lpop("list"));

        // hash
        jedis.hset("hset1","k1","v1");
        Map<String,String> hash = new HashMap<>();
        hash.put("k1","1");
        hash.put("k2","2");
        hash.put("k3","3");
        jedis.hmset("hset2",hash);
        System.out.println(jedis.hmget("hset2","k1","k3","k2"));
        System.out.println(jedis.hget("hset1", "k1"));
        System.out.println(jedis.hexists("hset2","k2"));
        System.out.println(jedis.hkeys("hset2"));

        // set
        jedis.sadd("set1","1","2","3");
        jedis.sadd("set2","4");
        System.out.println(jedis.smembers("set1"));
        System.out.println(jedis.scard("set1"));
        System.out.println(jedis.spop("set1"));
        jedis.smove("set1","set2","1");
        System.out.println(jedis.smembers("set1"));
        System.out.println(jedis.smembers("set2"));
        System.out.println(jedis.sinter("set1", "set2"));  // 交集
        System.out.println(jedis.sunion("set1","set2"));   // 并集

        // zset
        jedis.zadd("zset1",100,"v1");
        jedis.zadd("zset1",80,"v2");
        jedis.zadd("zset1",60,"v3");

        List<String> zset1 = jedis.zrange("zset1", 0, -1);
        for (String s : zset1) {
            System.out.println(s);
        }
        List<String> zset11 = jedis.zrevrange("zset1", 0, -1);
        for (String s : zset11) {
            System.out.println(s);
        }
    }
}

12.4 Lettuce

1.介绍以及和Jedis的区别

Lettuce是一个Redis的Java驱动包，Lettuce翻译为生菜，没错，就是吃的那种生菜，所以它的Logo就是生菜

2.步骤

1.改pom

java 复制代码

 <!--lettuce-->
        <dependency>
            <groupId>io.lettuce</groupId>
            <artifactId>lettuce-core</artifactId>
            <version>6.2.1.RELEASE</version>
        </dependency>

2.业务类

java 复制代码

import io.lettuce.core.RedisClient;
import io.lettuce.core.RedisURI;
import io.lettuce.core.api.StatefulRedisConnection;
import io.lettuce.core.api.sync.RedisCommands;

import java.util.List;


public class LettuceDemo {

    public static void main(String[] args) {
        // 1 使用构建器链式编程来builder我们的RedisURI
        RedisURI uri = RedisURI.builder()
                .withHost("192.168.238.111")//.redis("192.168.238.111")
                .withPort(6379)
                .withAuthentication("default", "123456")
                .build();
        // 2 连接客户端
        RedisClient redisClient = RedisClient.create(uri);
        StatefulRedisConnection<String, String> conn = redisClient.connect();

        // 3 创建操作的command, 通过conn 创建
        RedisCommands<String, String> commands = conn.sync();

        // string
        commands.set("k1","v1");
        System.out.println("==========================="+commands.get("k1"));
        System.out.println("==========================="+commands.mget("k1","k2"));
        List<String> keys = commands.keys("*");
        for (String key : keys) {
            System.out.println("========================="+key);
        }

        // list
        commands.lpush("list01","1","2","3");
        List<String> list01 = commands.lrange("list01", 0, -1);
        for (String s : list01) {
            System.out.println("================"+s);
        }
        System.out.println("===================="+ commands.rpop("list01", 2));

        // hash
        commands.hset("hash","k1","v1");
        commands.hset("hash","k2","v2");
        commands.hset("hash","k3","v3");
        System.out.println("======================="+commands.hgetall("hash"));
        Boolean hexists = commands.hexists("hash", "v2");
        System.out.println("------"+hexists);

        // set
        commands.sadd("s1","1","2");
        System.out.println("=================================" + commands.smembers("s1"));
        System.out.println(commands.sismember("s1", "1"));
        System.out.println(commands.scard("s1"));

        // zset
        commands.zadd("a1",100,"v1");
        commands.zadd("a1",80,"v2");
        System.out.println(commands.zrange("a1", 0, -1));
        System.out.println("======================"+commands.zcount("a1", "90", "100"));

        // 4 各种关闭释放资源  先开后关
        conn.close();
        redisClient.shutdown();

    }
}

12.5 Redis Template(推荐)

1.连接单机

1.改pom

java 复制代码

<!--SpringBoot与Redis整合依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
        </dependency>
        <!--swagger2-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>

2.写YML

java 复制代码

server.port=7777

spring.application.name=redis7_study

# ========================logging=====================
logging.level.root=info
logging.level.com.atguigu.redis7=info
logging.pattern.console=%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger- %msg%n 

logging.file.name=D:/mylogs2023/redis7_study.log
logging.pattern.file=%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger- %msg%n

# ========================swagger=====================
spring.swagger2.enabled=true
#在springboot2.6.X结合swagger2.9.X会提示documentationPluginsBootstrapper空指针异常，
#原因是在springboot2.6.X中将SpringMVC默认路径匹配策略从AntPathMatcher更改为PathPatternParser，
# 导致出错，解决办法是matching-strategy切换回之前ant_path_matcher
spring.mvc.pathmatch.matching-strategy=ant_path_matcher

# ========================redis单机=====================
spring.redis.database=0
# 修改为自己真实IP
spring.redis.host=192.168.111.185
spring.redis.port=6379
spring.redis.password=111111
spring.redis.lettuce.pool.max-active=8
spring.redis.lettuce.pool.max-wait=-1ms
spring.redis.lettuce.pool.max-idle=8
spring.redis.lettuce.pool.min-idle=0

3.业务类

3.1配置类

RedisConfig

java 复制代码

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;


@Configuration
public class RedisConfig
{
    /**
     * redis序列化的工具配置类，下面这个请一定开启配置
     * 127.0.0.1:6379> keys *
     * 1) "ord:102"  序列化过
     * 2) "\xac\xed\x00\x05t\x00\aord:102"   野生，没有序列化过
     * this.redisTemplate.opsForValue(); //提供了操作string类型的所有方法
     * this.redisTemplate.opsForList(); // 提供了操作list类型的所有方法
     * this.redisTemplate.opsForSet(); //提供了操作set的所有方法
     * this.redisTemplate.opsForHash(); //提供了操作hash表的所有方法
     * this.redisTemplate.opsForZSet(); //提供了操作zset的所有方法
     * @param lettuceConnectionFactory
     * @return
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory)
    {
        RedisTemplate<String,Object> redisTemplate = new RedisTemplate<>();

        redisTemplate.setConnectionFactory(lettuceConnectionFactory);
        //设置key序列化方式string
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        //设置value的序列化方式json，使用GenericJackson2JsonRedisSerializer替换默认序列化
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());

        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());

        redisTemplate.afterPropertiesSet();

        return redisTemplate;
    }
}

SwaggerConfig

java 复制代码

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;


@Configuration
@EnableSwagger2
public class SwaggerConfig
{
    @Value("${spring.swagger2.enabled}")
    private Boolean enabled;

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .enable(enabled)
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.lv")) //你自己的package
                .paths(PathSelectors.any())
                .build();
    }
    public ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("springboot利用swagger2构建api接口文档 "+"\t"+ DateTimeFormatter.ofPattern("yyyy-MM-dd").format(LocalDateTime.now()))
                .description("springboot+redis整合,有问题给管理员发邮件:")
                .version("1.0")
                .termsOfServiceUrl("https://www.atguigu.com/")
                .build();
    }
}

3.2 service

java 复制代码

import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.UUID;
import java.util.concurrent.ThreadLocalRandom;


@Service
@Slf4j
public class OrderService {

    // RedisTemplate  ===>  StringRedisTemplate
    @Resource
    private RedisTemplate redisTemplate;
    //    private StringRedisTemplate redisTemplate;

    public static  final String ORDER_KEY = "ord:";

    public void addOrder(){
        int keyId = ThreadLocalRandom.current().nextInt(1000)+1;
        String serialNo = UUID.randomUUID().toString();

        String key = ORDER_KEY+keyId;
        String value = "京东订单" + serialNo;

        redisTemplate.opsForValue().set(key,value);
        log.info("============key:{}",key);
        log.info("============value:{}",value);
    }

    public String getOrderId(Integer keyId){
        return (String) redisTemplate.opsForValue().get(ORDER_KEY + keyId);
    }
}

3.3 controller

java 复制代码

import com.lv.service.OrderService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;


@RestController
@Slf4j
@Api(tags = "订单接口")
public class OrderController {

    @Resource
    private OrderService orderService;

    @ApiOperation("新增订单")
    @RequestMapping(value = "/order/add", method = RequestMethod.POST)
    public void addOrder(){
        orderService.addOrder();
    }

    @ApiOperation("按照keyId 查询订单")
    @RequestMapping(value = "/order/{keyId}", method = RequestMethod.GET)
    public String getOrderId(@PathVariable Integer keyId){
        return orderService.getOrderId(keyId);
    }
}

测试

序列化问题

如果使用RedisTemplate，推荐序列化用StringRedisSerializer，默认使用的是JdkSerializationRedisSerializer，存入Redis会出现乱码问题，查询非常不方便

)

2.连接集群

1.正常启动

启动前面配的集群
改写YML（注意IP和端口）

java 复制代码

server.port= 7070
spring.application.name=redis7_study01

# ========================logging=====================
logging.level.root=info
logging.level.com.atguigu.redis7=info
logging.pattern.console=%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger- %msg%n 

logging.file.name=D:/mylogs2023/redis7_study.log
logging.pattern.file=%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger- %msg%n

# ========================swagger=====================
spring.swagger2.enabled=true
#在springboot2.6.X结合swagger2.9.X会提示documentationPluginsBootstrapper空指针异常，
#原因是在springboot2.6.X中将SpringMVC默认路径匹配策略从AntPathMatcher更改为PathPatternParser，
# 导致出错，解决办法是matching-strategy切换回之前ant_path_matcher
spring.mvc.pathmatch.matching-strategy=ant_path_matcher

# ========================redis单机=====================
#spring.redis.database=0
## 修改为自己真实IP
#spring.redis.host=192.168.238.111
#spring.redis.port=6379
#spring.redis.password=123456
#spring.redis.lettuce.pool.max-active=8
#spring.redis.lettuce.pool.max-wait=-1ms
#spring.redis.lettuce.pool.max-idle=8
#spring.redis.lettuce.pool.min-idle=0

spring.redis.password=123456
#获取失败，最大重定向次数
spring.redis.clusterspring.redis.cluster.nodes=192.1.max-redirects=3
spring.redis.lettuce.pool.max-active=8
spring.redis.lettuce.pool.max-wait=-1ms
spring.redis.lettuce.pool.max-idle=8
spring.redis.lettuce.pool.min-idle=0
68.238.111:6381,192.168.238.111:6382,192.168.238.112:6383,192.168.238.112:6384,192.168.238.113:6385,192.168.238.113:6386

Swagger测试接口

2.人为模拟down机

让master-6381down机，shutdown
查看集群信息，看slave是否上位 Cluster nodes
我们客户端再次读写
- 直接报错Error
- 原因是因为SpringBoot客户端没有动态感知到RedisCluster的最新集群信息
- 导致这个的原因是
  - Spring Boot 2，Redis默认的是 Lettuce(蕾缇斯)
  - 当Redis集群节点发生变化后，Lettuce默认是不会刷新节点拓扑

3.解决方案

1.排除Lettuce采用jedis（不推荐）

2.重写连接工厂(极度不推荐)

java 复制代码

// 很不推荐，不用了解
@Bean
public DefaultClientResources lettuceClientResources() {

    return DefaultClientResources.create();

}


@Bean
public LettuceConnectionFactory lettuceConnectionFactory(RedisProperties redisProperties, ClientResources clientResources) {

 

    ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder()

            .enablePeriodicRefresh(Duration.ofSeconds(30)) //按照周期刷新拓扑

            .enableAllAdaptiveRefreshTriggers() //根据事件刷新拓扑

            .build();

 

    ClusterClientOptions clusterClientOptions = ClusterClientOptions.builder()

            //redis命令超时时间,超时后才会使用新的拓扑信息重新建立连接

            .timeoutOptions(TimeoutOptions.enabled(Duration.ofSeconds(10)))

            .topologyRefreshOptions(topologyRefreshOptions)

            .build();

 

    LettuceClientConfiguration clientConfiguration = LettuceClientConfiguration.builder()

            .clientResources(clientResources)

            .clientOptions(clusterClientOptions)

            .build();

 

    RedisClusterConfiguration clusterConfig = new RedisClusterConfiguration(redisProperties.getCluster().getNodes());

    clusterConfig.setMaxRedirects(redisProperties.getCluster().getMaxRedirects());

    clusterConfig.setPassword(RedisPassword.of(redisProperties.getPassword()));

 

    LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory(clusterConfig, clientConfiguration);

 

    return lettuceConnectionFactory;

}

3.刷新节点集群拓扑动态感应

改写YML

java 复制代码

server.port= 7070
spring.application.name=redis7_study01
# ========================logging=====================
logging.level.root=info
logging.level.com.atguigu.redis7=info
logging.pattern.console=%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger- %msg%n 
logging.file.name=D:/mylogs2023/redis7_study.log
logging.pattern.file=%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger- %msg%n
# ========================swagger=====================
spring.swagger2.enabled=true
#在springboot2.6.X结合swagger2.9.X会提示documentationPluginsBootstrapper空指针异常，
#原因是在springboot2.6.X中将SpringMVC默认路径匹配策略从AntPathMatcher更改为PathPatternParser，
# 导致出错，解决办法是matching-strategy切换回之前ant_path_matcher
spring.mvc.pathmatch.matching-strategy=ant_path_matcher

# ========================redis单机=====================
#spring.redis.database=0
## 修改为自己真实IP
#spring.redis.host=192.168.238.111
#spring.redis.port=6379
#spring.redis.password=123456
#spring.redis.lettuce.pool.max-active=8
#spring.redis.lettuce.pool.max-wait=-1ms
#spring.redis.lettuce.pool.max-idle=8
#spring.redis.lettuce.pool.min-idle=0

spring.redis.password=123456
#获取失败，最大重定向次数
spring.redis.clusterspring.max-redirects=3
spring.redis.lettuce.pool.max-active=8
spring.redis.lettuce.pool.max-wait=-1ms
spring.redis.lettuce.pool.max-idle=8
spring.redis.lettuce.pool.min-idle=0
redis.cluster.nodes=192.168.238.111:6381,192.168.238.111:6382,192.168.238.112:6383,192.168.238.112:6384,192.168.238.113:6385,192.168.238.113:6386
#支持集群拓扑动态感应刷新,自适应拓扑刷新是否使用所有可用的更新，默认false关闭
spring.redis.lettuce.cluster.refresh.adaptive=true
#定时刷新
spring.redis.lettuce.cluster.refresh.period=2000

SpringBoot集成Redis

目录

12.1 配置文件

12.2 防火墙

12.3 Jedis(一般不用了，了解即可)

1.介绍

2.步骤

3.写YML

4.主启动

5.业务类

12.4 Lettuce

1.介绍以及和Jedis的区别

2.步骤

1.改pom

2.业务类

12.5 Redis Template(推荐)

1.连接单机

1.改pom

2.写YML

3.业务类

3.1配置类

3.2 service

3.3 controller

测试

序列化问题

2.连接集群

1.正常启动

2.人为模拟down机

3.解决方案

1.排除Lettuce采用jedis（不推荐）

2.重写连接工厂(极度不推荐)

3.刷新节点集群拓扑动态感应