springboot使用redisRepository和redistemplate操作redis的过程解析

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- commons-pool2 对象池依赖 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>

redis:
 timeout: 10000ms # 连接超时时间
 host: 192.168.10.100 # Redis服务器地址
 port: 6379 # Redis服务器端口
 database: 0 # 选择哪个库，默认0库
 lettuce:
  pool:
  max-active: 1024 # 最大连接数，默认 8
  max-wait: 10000ms # 最大连接阻塞等待时间，单位毫秒，默认 -1
  max-idle: 200 # 最大空闲连接，默认 8
  min-idle: 5 # 最小空闲连接，默认 0

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 {
@Bean
public RedisTemplate<String,Object> redisTemplate(LettuceConnectionFactory
redisConnectionFactory){
RedisTemplate<String,Object> redisTemplate = new RedisTemplate<>();
//为string类型key设置序列器
redisTemplate.seTKEySerializer(new StringRedisSerializer());
//为string类型value设置序列器
redisTemplate.setValueSerializer(new
GenericJackson2jsonRedisSerializer());
//为hash类型key设置序列器
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
//为hash类型value设置序列器
redisTemplate.setHashValueSerializer(new
GenericJackson2JsonRedisSerializer());
redisTemplate.setConnectionFactory(redisConnectionFactory);
return redisTemplate;
}
}

@Override
public List<Menu> getMenusByAdminId() {
Integer adminId = ((Admin)
SecurityContextHolder.getContext().getAuthentication().getPrincipal()).getId();
ValueOperations<String, Object> valueOperations =
redisTemplate.opsForValue();
//查询缓存中是否有数据
List<Menu> menus = (List<Menu>) valueOperations.get("menu_" + adminId);
if (CollectionUtils.isEmpty(menus)){
menus = menuMapper.getMenusByAdminId(adminId);
valueOperations.set("menu_"+adminId,menus);
}
return menus;
}

public class RedisConfig {
    @Bean
    public LettuceConnectionFactory redisConnectionFactory() {
        RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration("127.0.0.1", 6567);
        redisStandaloneConfiguration.setPassword("passWord");//如果有密码需要通过这个函数设置密码
        return new LettuceConnectionFactory(redisStandaloneConfiguration);
    }

@Bean
    public JedisConnectionFactory jedisConnectionFactory(){
        //如果使用jedis作为客户端也需要声明该bean 使用与上面的类似
}
@Bean
    public RedisTemplate<?,?> redisTemplate(){
        RedisTemplate<String,Object> template = new RedisTemplate<>();
    RedisSerializer<String> stringSerializer = new StringRedisSerializer();
    jdkSerializationRedisSerializer jdkSerializationRedisSerializer = new JdkSerializationRedisSerializer();
    template.setConnectionFactory(redisConnectionFactory());
    template.setKeySerializer(stringSerializer);
    template.setHashKeySerializer(stringSerializer);
    template.setValueSerializer(stringSerializer);
    template.setHashValueSerializer(jdkSerializationRedisSerializer);
    template.setEnableTransactionSupport(true);
    template.afterPropertiesSet();
    return template;
    
}
}

import lombok.Data;
import lombok.experimental.Accessors;
import org.springframework.data.redis.core.RedisHash;
import org.springframework.data.redis.core.index.Indexed;
@Accessors(chain = true)
@Data
@RedisHash(value="Student",timeToLive = 10)
public class stu implements Serializable {
    public enum Gender{
        MALE,FEMALE
    }
    private String id;
    @Indexed
    private String name;
    private Gender gender;
    //RedisHash注解用于声明该实体将被存储与RedisHash中，如果需要使用repository的数据访问形式，这个注解是必须用到的 timetoLive为实体对象在数据库的有效期
    //@Indexed用于标注需要作为查询条件的属性
}

@Repository
public interface StuRepository extends CrudRepository<stu,String> {
stu findByName(String name);
//自定义查询方法，使用了@Indexed的name属性查询
}

@SpringBootTest
public class RedisApplicationTests {
    @Autowired
    StuRepository stuRepository;

    @Test
    void testSave(){
        stu student = new stu().setId("0002").setName("xiaoming").setGender(stu.Gender.FEMALE);
        stuRepository.save(student);//根据id更新或者新增记录
    }
    @Test
    void testFindBy(){
        //使用主键查询
        assert stuRepository.findById("0002").isPresent();
        //根据自定义方法查询
        assert stuRepository.findByName("xiaoming") !=null;
    }
}