一、 springCloud作为公共模块搭建框架
springCloud 微服务模块中将redis作为公共模块进行的搭建结构图，如下：
二、redis 公共模块的搭建框架
- 如上架构，代码如下
- pom.xml 关键代码：
<dependencies>
<!-- SpringBoot Boot Redis -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
<version>2.5.1</version>
</dependency>
<dependency>
<groupId>org.redisson</groupId>
<artifactId>redisson-spring-boot-starter</artifactId>
<version>3.15.0</version>
</dependency>
</dependencies>
- Redis使用FastJson序列化
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import com.alibaba.fastjson.parser.ParserConfig;
import org.springframework.util.Assert;
import java.nio.charset.Charset;
/**
* Redis使用FastJson序列化
*/
public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T>
{
@SuppressWarnings("unused")
private ObjectMapper objectMapper = new ObjectMapper();
public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
private Class<T> clazz;
static
{
ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
}
public FastJson2JsonRedisSerializer(Class<T> clazz)
{
super();
this.clazz = clazz;
}
@Override
public byte[] serialize(T t) throws SerializationException
{
if (t == null)
{
return new byte[0];
}
return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
}
@Override
public T deserialize(byte[] bytes) throws SerializationException
{
if (bytes == null || bytes.length <= 0)
{
return null;
}
String str = new String(bytes, DEFAULT_CHARSET);
return JSON.parseObject(str, clazz);
}
public void setObjectMapper(ObjectMapper objectMapper)
{
Assert.notNull(objectMapper, "'objectMapper' must not be null");
this.objectMapper = objectMapper;
}
protected JavaType getJavaType(Class<?> clazz)
{
return TypeFactory.defaultInstance().constructType(clazz);
}
}
- redis 配置类
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
/**
* redis配置
*/
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport
{
@Bean
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory)
{
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(connectionFactory);
FastJson2JsonRedisSerializer serializer = new FastJson2JsonRedisSerializer(Object.class);
ObjectMapper mapper = new ObjectMapper();
mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);
serializer.setObjectMapper(mapper);
// 使用StringRedisSerializer来序列化和反序列化redis的key值
template.setKeySerializer(new StringRedisSerializer());
template.setValueSerializer(serializer);
// Hash的key也采用StringRedisSerializer的序列化方式
template.setHashKeySerializer(new StringRedisSerializer());
template.setHashValueSerializer(serializer);
template.afterPropertiesSet();
return template;
}
}
- 读取springcloud 服务模块中的yml中配置的redis代码实体
yml中的配置一般如下：
spring:
redis:
host: IP地址
port: 6379
password: 密码
之前连接redis代码中发现直接把账号和密码都写入模块了（可能当时为了方便）
这个造成如果地址发生变化需要不停的修改极其繁琐，索性将配置写入yml中，通过实体加配置ConfigurationProperties读取yml公用这样方便使用，起到了真正简化易改的作用
@Configuration
@RefreshScope
@Data
@ConfigurationProperties(prefix = "spring.redis") //切记此处一定要加spring否则容易读不出来
public class RedisConn {
@ApiModelProperty(value = "账号")
private String host;
@ApiModelProperty(value = "端口")
private int port;
@ApiModelProperty(value = "密码")
private String password;
}
- redis 连接配置
import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import javax.annotation.Resource;
import java.io.IOException;
@Configuration
public class RedssonConfig {
@Bean
@ConditionalOnMissingBean
public RedisConn getRedisConn()
{
return new RedisConn();
}
@Primary
@Bean
public RedissonClient redissonClient() throws IOException {
Config config = new Config();
RedisConn redisConn = getRedisConn();
//此处就是redis实体读取yml中的地址和端口，简单方便连接
String url = "redis://"+redisConn.getHost()+":"+redisConn.getPort();
System.out.println("url:"+url);
config.useSingleServer().setAddress(url)
.setPassword(redisConn.getPassword());
RedissonClient redisson = Redisson.create(config);
return redisson;
}
@Bean
public RedissonClient shutdown(@Qualifier("redissonClient") RedissonClient redissonClient) {
return redissonClient;
}
}
- 以上redis 就配置完了，后续我们可以写reids的模版的进行缓存的增加，删除等操作了，这个是个我写的小模块，大家可以根据自己的需求添加，方便后续其他的springcloud模块调用的方式
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
/**
* spring redis 工具类
**/
@SuppressWarnings(value = { "unchecked", "rawtypes" })
@Component
public class RedisService
{
@Autowired
public RedisTemplate redisTemplate;
/**
* 缓存基本的对象，Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
*/
public <T> void setCacheObject(final String key, final T value)
{
redisTemplate.opsForValue().set(key, value);
}
/**
* 缓存基本的对象，Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
* @param timeout 时间
* @param timeUnit 时间颗粒度
*/
public <T> void setCacheObject(final String key, final T value, final Long timeout, final TimeUnit timeUnit)
{
redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @return true=设置成功；false=设置失败
*/
public boolean expire(final String key, final long timeout)
{
return expire(key, timeout, TimeUnit.SECONDS);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @param unit 时间单位
* @return true=设置成功；false=设置失败
*/
public boolean expire(final String key, final long timeout, final TimeUnit unit)
{
return redisTemplate.expire(key, timeout, unit);
}
/**
* 判断 key是否存在
*
* @param key 键
* @return true 存在 false不存在
*/
public Boolean hasKey(String key)
{
return redisTemplate.hasKey(key);
}
/**
* 获得缓存的基本对象。
*
* @param key 缓存键值
* @return 缓存键值对应的数据
*/
public <T> T getCacheObject(final String key)
{
ValueOperations<String, T> operation = redisTemplate.opsForValue();
return operation.get(key);
}
/**
* 删除单个对象
*
* @param key
*/
public boolean deleteObject(final String key)
{
return redisTemplate.delete(key);
}
/**
* 删除集合对象
*
* @param collection 多个对象
* @return
*/
public long deleteObject(final Collection collection)
{
return redisTemplate.delete(collection);
}
}
- 另外切记在spring.factories中进行注入哈
至此，这个redis的公共模块就完成了，大家可以直接在其他服务模块中将redis当成一个依赖添加到对应的服务的pom中即可如下：
<dependency>
<groupId>com.（包名）</groupId>
<artifactId>common-redis</artifactId>
</dependency>
