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SpringBoot使用Redis缓存

时间:2017-07-22 21:14:14      阅读:284      评论:0      收藏:0      [点我收藏+]

标签:数据库   raw   target   password   清空   mil   jar包   bin   app   

  (1)pom.xml引入jar包,如下:

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

  (2)application.properties中配置Redis连接信息,如下:

# Redis数据库索引(默认为0)
spring.redis.database=0
# Redis服务器地址
spring.redis.host=172.31.19.222
# Redis服务器连接端口
spring.redis.port=6379
# Redis服务器连接密码(默认为空)
spring.redis.password=
# 连接池最大连接数(使用负值表示没有限制)
spring.redis.pool.max-active=8
# 连接池最大阻塞等待时间(使用负值表示没有限制)
spring.redis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间(毫秒)
spring.redis.timeout=0

  (3)新建Redis缓存配置类RedisConfig,如下:

package springboot.config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cache.CacheManager;
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.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 com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;


/**
 * Redis缓存配置类
 * @author szekinwin
 *
 */
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport{

    @Value("${spring.redis.host}")
    private String host;
    @Value("${spring.redis.port}")
    private int port;
    @Value("${spring.redis.timeout}")
    private int timeout;
    
    //自定义缓存key生成策略
//    @Bean
//    public KeyGenerator keyGenerator() {
//        return new KeyGenerator(){
//            @Override
//            public Object generate(Object target, java.lang.reflect.Method method, Object... params) {
//                StringBuffer sb = new StringBuffer();
//                sb.append(target.getClass().getName());
//                sb.append(method.getName());
//                for(Object obj:params){
//                    sb.append(obj.toString());
//                }
//                return sb.toString();
//            }
//        };
//    }
    //缓存管理器
    @Bean 
    public CacheManager cacheManager(@SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {
        RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
        //设置缓存过期时间 
        cacheManager.setDefaultExpiration(10000);
        return cacheManager;
    }
    @Bean
    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory){
        StringRedisTemplate template = new StringRedisTemplate(factory);
        setSerializer(template);//设置序列化工具
        template.afterPropertiesSet();
        return template;
    }
     private void setSerializer(StringRedisTemplate template){
            @SuppressWarnings({ "rawtypes", "unchecked" })
            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.setValueSerializer(jackson2JsonRedisSerializer);
     }
}

  (4)新建UserMapper,如下:

package springboot.dao;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;

import springboot.domain.User;

@Mapper
@CacheConfig(cacheNames = "users")
public interface UserMapper {

    @Insert("insert into user(name,age) values(#{name},#{age})")
    int addUser(@Param("name")String name,@Param("age")String age);
    
    @Select("select * from user where id =#{id}")
    @Cacheable(key ="#p0") 
    User findById(@Param("id") String id);
    
    @CachePut(key = "#p0")
    @Update("update user set name=#{name} where id=#{id}")
    void updataById(@Param("id")String id,@Param("name")String name);
    
    //如果指定为 true,则方法调用后将立即清空所有缓存
    @CacheEvict(key ="#p0",allEntries=true)
    @Delete("delete from user where id=#{id}")
    void deleteById(@Param("id")String id);
    
}

  @Cacheable将查询结果缓存到redis中,(key="#p0")指定传入的第一个参数作为redis的key。

  @CachePut,指定key,将更新的结果同步到redis中

  @CacheEvict,指定key,删除缓存数据,allEntries=true,方法调用后将立即清除缓存

  (5)service层与controller层跟上一篇整合一样,启动redis服务器,redis服务器的安装与启动可以参考之前的博客,地址如下:

    http://www.cnblogs.com/gdpuzxs/p/6623171.html

  (6)配置log4j日志信息,如下:

 

## LOG4J配置
log4j.rootCategory=DEBUG,stdout
## 控制台输出
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n

 

  

 

SpringBoot使用Redis缓存

标签:数据库   raw   target   password   清空   mil   jar包   bin   app   

原文地址:http://www.cnblogs.com/gdpuzxs/p/7222309.html

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