1 添加Redis依赖
引入需要集成的redis版本
<!--spring redis 2.8.2 start--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> <version>2.4.2</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.7.10.RELEASE</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.8.1</version> </dependency> <!--spring redis 2.8.2 end-->
2 添加redis相关配置
redis-config.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:cache="http://www.springframework.org/schema/cache"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
<context:property-placeholder location="classpath*:config/redis.properties" />
<!-- 启用缓存注解功能，这个是必须的，否则注解不会生效，另外，该注解一定要声明在spring主配置文件中才会生效 -->
<cache:annotation-driven cache-manager="cacheManager" />
<!-- redis 相关配置 -->
<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="${redis.maxIdle}" />
<property name="maxWaitMillis" value="${redis.maxWait}" />
<property name="testOnBorrow" value="true" />
</bean>
<bean id="JedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<property name="hostName" value="${redis.host}"/>
<property name="port" value="${redis.port}" />
<property name="password" value="${redis.password}" />
<property name="poolConfig" ref="poolConfig" />
</bean>
<bean id="jacksonJsonRedisSerializer" class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
<bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="JedisConnectionFactory" />
<property name="keySerializer" ref="stringRedisSerializer" />
<property name="hashKeySerializer" ref="stringRedisSerializer" />
<property name="valueSerializer" ref="jacksonJsonRedisSerializer" />
<property name="hashValueSerializer" ref="jacksonJsonRedisSerializer" />
</bean>
<!-- spring自己的缓存管理器，这里定义了缓存位置名称 ，即注解中的value -->
<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
<property name="caches">
<set>
<!-- 这里可以配置多个redis -->
<bean class="com.test.common.redis.RedisCacheUtil">
<property name="redisTemplate" ref="redisTemplate" />
<property name="name" value="common" />
<!-- common名称要在类或方法的注解中使用 -->
</bean>
</set>
</property>
</bean>
</beans>
3 导入配置文件
<import resource="classpath:redis-config.xml" />
4 添加redis数据库参数配置
redis.properties
###redis的配置 redis.host=192.168.1.59 redis.port=7000 redis.password=2131232 #一个pool最多可有多少个状态为idle（空闲）的jedis实例 redis.maxIdle=50 redis.minIdle=10 redis.maxWait=3000 #一个pool可分配多少个jedis实例 redis.maxTotal=200 redis.expiration=30000
5.添加redis工具类
/**
* Redis缓存工具类: 实现Cache，支撑spring cache的使用
*/
@Component
public class RedisCacheUtil implements Cache{
@Autowired
private RedisTemplate<String, Object> redisTemplate;
private String name;
public RedisTemplate<String, Object> getRedisTemplate() {
return redisTemplate;
}
public void setRedisTemplate(RedisTemplate<String, Object> redisTemplate) {
this.redisTemplate = redisTemplate;
}
public void setName(String name) {
this.name = name;
}
@Override
public String getName() {
return this.name;
}
@Override
public Object getNativeCache() {
return this.redisTemplate;
}
@Override
public ValueWrapper get(Object key) {
final String keyf = key.toString();
Object object = null;
object = redisTemplate.execute(new RedisCallback<Object>() {
public Object doInRedis(RedisConnection connection)
throws DataAccessException {
byte[] key = keyf.getBytes();
byte[] value = connection.get(key);
if (value == null) {
return null;
}
return toObject(value);
}
});
return (object != null ? new SimpleValueWrapper(object) : null);
}
@Override
public void put(Object key, Object value) {
final String keyf = key.toString();
final Object valuef = value;
final long liveTime = 86400;//默认实现时间1天
redisTemplate.execute(new RedisCallback<Long>() {
public Long doInRedis(RedisConnection connection)
throws DataAccessException {
byte[] keyb = keyf.getBytes();
byte[] valueb = toByteArray(valuef);
connection.set(keyb, valueb);
if (liveTime > 0) {
connection.expire(keyb, liveTime);
}
return 1L;
}
});
}
private byte[] toByteArray(Object obj) {
byte[] bytes = null;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(obj);
oos.flush();
bytes = bos.toByteArray();
oos.close();
bos.close();
}catch (IOException ex) {
ex.printStackTrace();
}
return bytes;
}
private Object toObject(byte[] bytes) {
Object obj = null;
try {
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new ObjectInputStream(bis);
obj = ois.readObject();
ois.close();
bis.close();
} catch (IOException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
return obj;
}
@Override
public void evict(Object key) {
System.out.println("del key");
final String keyf = key.toString();
redisTemplate.execute(new RedisCallback<Long>() {
public Long doInRedis(RedisConnection connection)
throws DataAccessException {
return connection.del(keyf.getBytes());
}
});
}
@Override
public void clear() {
// TODO Auto-generated method stub
System.out.println("clear key");
redisTemplate.execute(new RedisCallback<String>() {
public String doInRedis(RedisConnection connection)
throws DataAccessException {
connection.flushDb();
return "ok";
}
});
}
@Override
public <T> T get(Object key, Class<T> type) {
// TODO Auto-generated method stub
return null;
}
@Override
public ValueWrapper putIfAbsent(Object key, Object value) {
// TODO Auto-generated method stub
return null;
}
@Override
public <T> T get(Object arg0, Callable<T> arg1) {
// TODO Auto-generated method stub
return null;
}
}
6 业务代码中cache配置使用
/** Redis cached 测试
* value值：对应redis-config.xml中cacheManager中配置的name。
key值：redis的key值，请保证唯一，否则会被覆盖。可以通过#参数的方式获取传入的参数作为key值
* @return
*/
@Cacheable(value="common",key="'test1'")
public int getTest1() {
int i=new Random().nextInt();
return i;
}
@Cacheable(value="common",key="'test2_id_'+#userId")
public Map getTest2(String userId){
Map map = new HashMap();
List<TestModel> testModels=test();
map.put("total", testModels);
return map;
}