Redis7之Spring Boot集成Redis（十一）

十一 Spring Boot集成Redis

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

2.防火墙

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

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

<?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>

写YML

server.port=7777

spring.application.name=redis7_study

主启动

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);
    }
}

业务类

import redis.clients.jedis.Jedis;

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

/**
 * @Author:晓风残月Lx
 * @Date: 2023/3/13 21:32
 */
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("123456");

        //  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);
        }
    }
}

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

在这里插入图片描述

2.步骤

改POM(导包)

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

业务类

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;

/**
 * @Author:晓风残月Lx
 * @Date: 2023/3/13 22:13
 */
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")
                .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();

    }
}

PS:这个东西的输出真的很难找到

5.RedisTemplate (推荐)

1.连接单机

ps:Module还是刚刚的，所以省略了建Module

改POM(导包)

<!--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>

写YML

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

业务类

**配置类 **

RedisConfig

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;

/**
 * @auther 晓风残月Lx
 * @create 2023-03-14 8:11
 */
@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

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;

/**
 * @auther 晓风残月Lx
 * @create 2023-03-14 8:11
 */
@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:[email protected]")
                .version("1.0")
                .termsOfServiceUrl("https://www.atguigu.com/")
                .build();
    }
}

service

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;

/**
 * @Author:晓风残月Lx
 * @Date: 2023/3/14 8:10
 */
@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);
    }
}

controller

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;

/**
 * @Author:晓风残月Lx
 * @Date: 2023/3/14 8:19
 */
@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

swagger (http://localhost:7070/swagger-ui.html) 测试接口
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

在这里插入图片描述

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）

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
- 当Redis集群节点发生变化后，Lettuce默认是不会刷新节点拓扑

解决方法：

排除Lettuce采用jedis（不了吧最好）

重写连接工厂实例（还不如第一种）

// 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;

}

刷新节点结群拓扑和动态感应（推荐）

改YML，一步到位(最后多了两行配置)

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
#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

Redis7之Spring Boot集成Redis（十一）

十一 Spring Boot集成Redis

1.配置文件

2.防火墙

3.Jedis （一般不用了，了解即可）

1.介绍

2.步骤

4.Lettuce

1.介绍以及和Jedis的区别

2.步骤

5.RedisTemplate (推荐)

1.连接单机

2.连接集群

1.正常启动

2.人为模拟down机

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