第七章Redis_Jedis_测试

第7章-Redis_Jedis_测试

7.1Jedis所需要的jar包

 
        redis.clients
        jedis
        3.2.0
    
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7.2连接 Redis 注意事项

禁用 Linux 的防火墙：Linux(CentOS7)里执行命令
systemctl stop/disable firewalld.service
redis.conf 中注释掉 bind 127.0.0.1 ,然后 protected-mode no

7.3步骤说明

7.3.1新建一个maven工程

引入依赖
新建个测试类

host为Linux的ip地址，因为redis在Linux上，port为redis的默认端口号6379
点击运行
检查Linux的防火墙，将其暂时关闭

确保防火墙关闭状态

如果之前修改了，记得重新启动一下redis
测试成功！

7.4测试相关的数据

7.4.1 Jedis-API Key

演示：

7.4.2 Jedis-API String

7.4.3 Jedis-API List

7.4.4 Jedis-API set

7.4.5 Jedis-API hash

7.4.6 Jedis-API zset

7.5完成一个手机验证码功能

要求：
1、输入手机号，点击发送后随机生成 6位数字码，2分钟有效
2、输入验证码，点击验证，返回成功或失败
3、每个手机号每天只能输入3次

public class JedisDemo1 {
    public static void main(String[] args) {
        //模拟验证码发送
        verifyCode("13678765435");

        //模拟验证码校验
        //getRedisCode("13678765435","4444");
    }

    //校验验证码
    public static void getRedisCode(String phone,String code){
        //从redis获取验证码
        Jedis jedis = new Jedis("192.168.200.130", 6379);
        //拼接一个字符串key
        String codeKey="VerifyCode"+phone+":code";
        String redisCode = jedis.get(codeKey);
        //判断
        if(redisCode.equals(code)){
            System.out.println("成功！");
        }else{
            System.out.println("失败");
        }
        jedis.close();
    }

    //2 每个手机每天只能发送三次，验证码放到redis中，设置过期时间120
    public static void verifyCode(String phone) {
        //连接redis
        Jedis jedis = new Jedis("192.168.44.168",6379);

        //拼接key
        //手机发送次数key
        String countKey = "VerifyCode"+phone+":count";
        //验证码key
        String codeKey = "VerifyCode"+phone+":code";

        //每个手机每天只能发送三次
        String count = jedis.get(countKey);
        if(count == null) {
            //没有发送次数，第一次发送
            //设置发送次数是1
            jedis.setex(countKey,24*60*60,"1");
        } else if(Integer.parseInt(count)<=2) {
            //发送次数+1
            jedis.incr(countKey);
        } else if(Integer.parseInt(count)>2) {
            //发送三次，不能再发送
            System.out.println("今天发送次数已经超过三次");
            jedis.close();
        }

        //发送验证码放到redis里面
        String vcode = getCode();
        jedis.setex(codeKey,120,vcode);
        jedis.close();
    }


    //得到6位随机验证码
    public static String getCode(){
        Random random = new Random();
        String code = "";
        for (int i = 0; i < 6; i++) {
            code+= random.nextInt(10);
        }

        return code;
    }
}
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7.6Redis与Spring Boot 整合

Spring Boot 整合Redis非常简单，只需要按如下步骤整合即可
1、 在 pom.xml 文件中引入 redis 相关依赖

  <dependencies>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-redisartifactId>
        dependency>

        
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-pool2artifactId>
            <version>2.6.0version>
        dependency>
    dependencies>
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2、 application.properties配置redis 配置
3、 添加 redis 配置类
RedisConfig

@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setConnectionFactory(factory);
//key序列化方式
        template.setKeySerializer(redisSerializer);
//value序列化
        template.setValueSerializer(jackson2JsonRedisSerializer);
//value hashmap序列化
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        return template;
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
//解决查询缓存转换异常的问题
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
// 配置序列化（解决乱码的问题）,过期时间600秒
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(600))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }
}
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4、测试一下
RedisTestController 中添加测试方法

@RestController
@RequestMapping("/redisTest")
public class RedisTestController {

    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping
    public  String testRedis(){
        //设置redis
        redisTemplate.opsForValue().set("name","lucy");
        String  name = (String)redisTemplate.opsForValue().get("name");
        return name;
    }
}

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启动springboot

返回Redis目录