为什么80%的码农都做不了架构师?>>>
参考:
http://www.cnblogs.com/edwinchen/p/3816938.html
本项目创建的是Maven项目
一、pom.xml引入dependencies
<dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-redis</artifactId><version>1.7.3.RELEASE</version></dependency><dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>2.7.3</version><exclusions><exclusion><groupId>org.apache.commons</groupId><artifactId>commons-pool2</artifactId></exclusion></exclusions></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.3.8.RELEASE</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-pool2</artifactId><version>2.4.2</version></dependency>
二、配置applicationContext-redis.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsd"><bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"><property name="maxTotal" value="${redis.pool.maxTotal}" /><property name="maxIdle" value="${redis.pool.maxIdle}" /><property name="maxWaitMillis" value="${redis.pool.maxWaitMillis}" /><property name="testOnBorrow" value="${redis.pool.testOnBorrow}" /><property name="testOnReturn" value="${redis.pool.testOnReturn}" /><property name="testWhileIdle" value="${redis.pool.testWhileIdle}"/></bean><bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"p:hostName="${redis.host}" p:port="${redis.port}" p:password="${redis.password}"p:poolConfig-ref="poolConfig"/><bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"><property name="connectionFactory" ref="connectionFactory" /><property name="keySerializer"><bean class="org.springframework.data.redis.serializer.StringRedisSerializer" /></property><property name="valueSerializer"><bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" /></property></bean></beans>
注意:配置poolConfig中property 的name 需要对应JedisPoolConfig这个类中实际的属性;
配置connectionFactory同样要注意这个,因为其他博文配置属性时有所不同,主要是因为redis版本不同引起的有所不同。
三、properties文件配置值
# poolConfig 配置信息
redis.pool.maxTotal=1024
redis.pool.maxIdle=200
redis.pool.maxWaitMillis=1000
redis.pool.testOnBorrow=true
redis.pool.testOnReturn=true
redis.pool.testWhileIdle=true# connectionFactory 配置信息
redis.host=localhost
redis.port=6379
redis.timeout=15000
redis.password=123456
另外,需要注意的是,要引入该文件可以在applicationContext-redis.xml加入
<!-- scanner redis properties 假如有封装用于加载properties,就不需要加这句了 -->
<context:property-placeholder location="classpath:property/redis.properties" />
四、使用RedisTemplate
其他项目需要RedisTemplate的时候,需要引入以上maven模块的dependency
测试类使用:
/*** 测试 spring-data-redis 集成* Created by zhile on 2017/5/12 0012.*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class TestRedis {@Autowiredprivate RedisTemplate redisTemplate;@Testpublic void testTemple() {ValueOperations valueOperations = redisTemplate.opsForValue();valueOperations.set("spring-data-redis::test", "tom", 1000, TimeUnit.SECONDS);System.out.println("set successed");
/*ValueOperations valueOpers = redisTemplate.opsForValue();System.out.println("get:" + valueOpers.get("spring-data-redis::test"));*/}@Testpublic void testRedisTemple() {ValueOperations valueOpers = redisTemplate.opsForValue();System.out.println("get:" + valueOpers.get("spring-data-redis::test"));}
}
这样,只要引入集成了RedisTemplate的maven模块,就可以直接使用。
五、问题小结:
1.引入的dependency需要注意兼容性,因为redis2.7.3 中的commons-pool2版本不完整,需要引入较新的commons-pool2。
Caused by: java.lang.NoSuchMethodError:
redis.clients.jedis.JedisPool.apache/commons/pool2/impl/GenericObjectPoolConfig等等
2.假如spring-data-redis的版本1.8.3,而redis的版本还是为2.7.3的话,会报这样的错:
所以,需要注意版本兼容的问题,这是因为spring-data-redis的版本太新点。
java.lang.IllegalStateException: Failed to load ApplicationContext Caused by: org.springframework.beans.factory.BeanCreationException:Error creating bean with name 'redisTemplate' defined in class path resource [applicationContext-redis.xml]:...Caused by: org.springframework.beans.factory.BeanCreationException:Error creating bean with name 'connectionFactory' defined in class path resource[applicationContext-redis.xml]:...Caused by: java.lang.NoClassDefFoundError:
Could not initialize class org.springframework.data.redis.connection.jedis.JedisConnectionFactory...
补充参考:
http://zhaozhiming.github.io/blog/2015/04/12/spring-data-redis/
http://www.baeldung.com/spring-data-redis-tutorial