如果对spring cache不了解,这边有一篇文章详细的介绍了
http://jinnianshilongnian.iteye.com/blog/2001040
改项目基于maven构建
相关依赖
Xml代码
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<
dependency
>
<
groupId
>org.springframework.data</
groupId
>
<
artifactId
>spring-data-redis</
artifactId
>
<
version
>1.3.4.RELEASE</
version
>
</
dependency
>
<
dependency
>
<
groupId
>redis.clients</
groupId
>
<
artifactId
>jedis</
artifactId
>
<
version
>2.5.2</
version
>
</
dependency
>
<
dependency
>
<
groupId
>org.springframework</
groupId
>
<
artifactId
>spring-jdbc</
artifactId
>
<
version
>3.2.13.RELEASE</
version
>
</
dependency
>
<!-- 日志记录依赖包,很多都依赖此包,像log4j,json-lib等等 -->
<
dependency
>
<
groupId
>commons-logging</
groupId
>
<
artifactId
>commons-logging-api</
artifactId
>
<
version
>1.1</
version
>
</
dependency
>
<!-- junit 测试包 -->
<
dependency
>
<
groupId
>junit</
groupId
>
<
artifactId
>junit</
artifactId
>
<
version
>4.11</
version
>
<
scope
>test</
scope
>
</
dependency
>
<
dependency
>
<
groupId
>org.springframework</
groupId
>
<
artifactId
>spring-test</
artifactId
>
<
version
>3.2.13.RELEASE</
version
>
<
scope
>test</
scope
>
</
dependency
>
|
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<?
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:context
=
"http://www.springframework.org/schema/context"
xmlns:cache
=
"http://www.springframework.org/schema/cache"
xmlns:p
=
"http://www.springframework.org/schema/p"
xmlns:c
=
"http://www.springframework.org/schema/c"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache-3.2.xsd"
default-lazy-init
=
"true"
>
<
context:property-placeholder
location
=
"classpath:redis.properties"
/>
<!-- 自动扫描包 -->
<
context:component-scan
base-package
=
"com.layou"
/>
<!-- 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"
/>
<!-- spring自己的换管理器,这里定义了两个缓存位置名称 ,既注解中的value -->
<
bean
id
=
"cacheManager"
class
=
"org.springframework.cache.support.SimpleCacheManager"
>
<
property
name
=
"caches"
>
<
set
>
<
bean
class
=
"com.layou.RedisCache"
>
<
property
name
=
"redisTemplate"
ref
=
"redisTemplate"
/>
<
property
name
=
"name"
value
=
"default"
/>
</
bean
>
</
set
>
</
property
>
</
bean
>
<!-- redis 相关配置 -->
<
bean
id
=
"poolConfig"
class
=
"redis.clients.jedis.JedisPoolConfig"
>
<
property
name
=
"maxIdle"
value
=
"${redis.pool.maxIdle}"
/>
<
property
name
=
"maxTotal"
value
=
"${redis.pool.maxActive}"
/>
<
property
name
=
"maxWaitMillis"
value
=
"${redis.pool.maxWait}"
/>
<
property
name
=
"testOnBorrow"
value
=
"${redis.pool.testOnBorrow}"
/>
</
bean
>
<
bean
id
=
"connectionFactory"
class
=
"org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
>
<
property
name
=
"hostName"
value
=
"${redis.host}"
/>
<
property
name
=
"port"
value
=
"${redis.port}"
/>
<
property
name
=
"password"
value
=
"${redis.password}"
/>
<
property
name
=
"timeout"
value
=
"${redis.timeout}"
/>
<
property
name
=
"usePool"
value
=
"true"
/>
<
property
name
=
"poolConfig"
ref
=
"poolConfig"
/>
</
bean
>
<
bean
id
=
"redisTemplate"
class
=
"org.springframework.data.redis.core.RedisTemplate"
>
<
property
name
=
"connectionFactory"
ref
=
"connectionFactory"
/>
</
bean
>
</
beans
>
|
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#redis.host=localhost
redis.host=192.168.71.145
redis.port=6379
redis.password=
#客户端超时时间单位是毫秒
redis.timeout=100000
#最大连接数
redis.pool.maxActive=500
#最大能够保持idel状态的对象数
redis.pool.maxIdle=200
#最大建立连接等待时间
redis.pool.maxWait=2000
#当调用borrow Object方法时,是否进行有效性检查
redis.pool.testOnBorrow=true
|
首先,通过自己实现Cache接口来实现对redis的相关操作
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package
com.layou;
import
java.io.ByteArrayInputStream;
import
java.io.ByteArrayOutputStream;
import
java.io.IOException;
import
java.io.ObjectInputStream;
import
java.io.ObjectOutputStream;
import
org.springframework.cache.Cache;
import
org.springframework.cache.support.SimpleValueWrapper;
import
org.springframework.dao.DataAccessException;
import
org.springframework.data.redis.connection.RedisConnection;
import
org.springframework.data.redis.core.RedisCallback;
import
org.springframework.data.redis.core.RedisTemplate;
public
class
RedisCache
implements
Cache {
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 = (String) key;
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 = (String) key;
final
Object valuef = value;
final
long
liveTime =
86400
;
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;
}
});
}
@Override
public
void
evict(Object key) {
final
String keyf = (String) key;
redisTemplate.execute(
new
RedisCallback<Long>() {
public
Long doInRedis(RedisConnection connection)
throws
DataAccessException {
return
connection.del(keyf.getBytes());
}
});
}
@Override
public
void
clear() {
redisTemplate.execute(
new
RedisCallback<String>() {
public
String doInRedis(RedisConnection connection)
throws
DataAccessException {
connection.flushDb();
return
"ok"
;
}
});
}
/**
* 描述 : <Object转byte[]>. <br>
* <p>
* <使用方法说明>
* </p>
*
* @param obj
* @return
*/
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;
}
/**
* 描述 : <byte[]转Object>. <br>
* <p>
* <使用方法说明>
* </p>
*
* @param bytes
* @return
*/
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;
}
}
|
使用junit进行测试
package com.layou;
import org.junit.Before;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.CacheManager;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
@ContextConfiguration(locations = {"classpath:applicationContext-cache-redis.xml"})
public class RedisTest extends AbstractJUnit4SpringContextTests {
private RedisCache cache;
@Autowired
private CacheManager manager;
@Before
public void before() {
cache = (RedisCache) manager.getCache("default");
}
@Test
public void testAdd() throws Exception {
cache.put("test", 1);
}
@Test
public void testGet() throws Exception {
System.out.println(cache.get("test").get());
}
@Test
public void testEvict() throws Exception {
cache.evict("test");
}
@Test
public void testClear() throws Exception {
cache.clear();
}
}
在实际项目中,多是通过Spring的注解完成相关操作
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package
com.layou;
import
org.springframework.cache.annotation.CacheEvict;
import
org.springframework.cache.annotation.Cacheable;
import
org.springframework.stereotype.Service;
@Service
public
class
RedisAnnotation {
/**
* 第一次查询会到数据库中差寻,第二次就会从缓存中取
* #id代表使用参数id
* 一定要放在spring容器中管理,不然拦截不到
* @param id
* @return
*/
@Cacheable
(key=
"'name' + #id"
, value=
"default"
)
public
String getNameById(
int
id) {
//TODO 进行数据库查询并返回查询数据库内容
System.out.println(
"查询数据库"
);
return
""
+ id;
}
/**
* 从缓存中删除
* @param id
*/
@CacheEvict
(key=
"'name' + #id"
, value=
"default"
)
public
void
deleteById(
int
id) {
System.out.println(
"数据库删除"
);
}
}
|
使用junit进行相关测试
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package
com.layou;
import
org.junit.Test;
import
org.springframework.beans.factory.annotation.Autowired;
import
org.springframework.test.context.ContextConfiguration;
import
org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
@ContextConfiguration
(locations = {
"classpath:applicationContext-cache-redis.xml"
})
public
class
RedisAnnotationTest
extends
AbstractJUnit4SpringContextTests {
@Autowired
private
RedisAnnotation redis;
@Test
public
void
testQuery() {
//第二次查询的时候就会从缓存中取
System.out.println(redis.getNameById(
1
));
}
@Test
public
void
testDelete() {
redis.deleteById(
1
);
}
}
|
本文转自yunlielai51CTO博客,原文链接:http://blog.51cto.com/4925054/1741066 ,如需转载请自行联系原作者