springboot09-redis

redis安装：

从redis官网下载redis包，解压后：

 

cmd执行命令启动本地redis：

D:

cd D:\Program Files\redis2.4.5\64bit

redis-server.exe redis.conf

起动成功后，使用Redis DeskTop Manager客户端连接访问

 

 

下面开始java代码：

 

1.导入依赖

<!--redis-->
<dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-redis</artifactId>
</dependency>

2.配置RedisConfig

package com.mlxs.springboot09.redis.config;


import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

import java.lang.reflect.Method;

/**
 * RedisConfig类描述:
 *
 * @author yangzhenlong
 * @since 2017/3/16
 */
@Configuration
@EnableCaching
public class RedisConfig {

    @Bean
    public CacheManager cacheManager(RedisTemplate redisTemplate){
        return new RedisCacheManager(redisTemplate);
    }

    /**
     * redisTemplate对象
     * @param factory
     * @return
     */
    @SuppressWarnings("SpringJavaAutowiringInspection")
    @Bean
    public RedisTemplate<String, String> redisTemplate( RedisConnectionFactory factory){
        StringRedisTemplate redisTemplate = new StringRedisTemplate (factory);
        redisTemplate.setValueSerializer(this.getRedisSerializer());
        return redisTemplate;
    }

    /**
     * key生成策略
     * @return
     */
    @Bean
    public KeyGenerator keyGenerator(){
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName()).append(".")
                        .append(method.getName()).append("-");//类名.方法名
                if(params.length > 0){
                    for(Object param : params){
                        sb.append("&" + param.toString());//&123&abc
                    }
                }
                return sb.toString();
            }
        };
    }

    /**
     * json序列化对象
     * @return
     */
    private Jackson2JsonRedisSerializer getRedisSerializer(){
        Jackson2JsonRedisSerializer redisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        redisSerializer.setObjectMapper(this.getObjectMapper());
        return redisSerializer;
    }

    private ObjectMapper getObjectMapper(){
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        return objectMapper;
    }
}

3.单元测试

@RunWith(SpringRunner.class)
@SpringBootTest(classes = MainApp.class)
public class RedisTest {

    @Autowired
    private RedisTemplate redisTemplate;

    @Test
    public void test(){
        List<User> userList = User.buildUser();
        for(User user : userList) {
            redisTemplate.opsForValue().set("user" + user.getId(), user);
        }

        Object user1 = redisTemplate.opsForValue().get("user1");
        System.out.println("user1:" + user1);
    }
}

查看redis中的值：

控制台打印：

 

4.写service，使用key生成策略

@Service
public class UserService {

    @Cacheable(value = "userCache", keyGenerator = "keyGenerator")//设置redis 和
    public List<User> users(){
        return User.buildUser();
    }
}

5.写controller，调用service。第一次调用，会在redis写入值，第二次调用不会再进service，直接从redis读取值

@RestController
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping("/users")
    public List<User> list(){
        return userService.users();
    }
}

启动springboot启动类，访问http://localhost:8080/users

查看reids