Redis整合Spring结合使用缓存实例
发布时间：2020-05-23 13:00:23 所属栏目：MsSql 来源：互联网
导读：一、Redis介绍什么是Redis？redis是一个key-value存储系统。和Memcached类似，它支持存储的value类型相对更多，包括string(字符串)、list(链表)、set(集合)、zset(sortedset--有序集
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一、Redis介绍 <!--Redis start --> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.6.1.RELEASE</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.7.3</version> </dependency> <!--Redis end --> 2、配置bean
<!-- jedis 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="${redis.testOnBorrow}" />
</bean >
<!-- redis服务器中心 -->
<bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" >
<property name="poolConfig" ref="poolConfig" />
<property name="port" value="${redis.port}" />
<property name="hostName" value="${redis.host}" />
<property name="password" value="${redis.password}" />
<property name="timeout" value="${redis.timeout}" ></property>
</bean >
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate" >
<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 >
<!-- cache配置 -->
<bean id="methodCacheInterceptor" class="com.mucfc.msm.common.MethodCacheInterceptor" >
<property name="redisUtil" ref="redisUtil" />
</bean >
<bean id="redisUtil" class="com.mucfc.msm.common.RedisUtil" >
<property name="redisTemplate" ref="redisTemplate" />
</bean >
其中配置文件redis一些配置数据redis.properties如下： #redis中心 redis.host=10.75.202.11 redis.port=6379 redis.password=123456 redis.maxIdle=100 redis.maxActive=300 redis.maxWait=1000 redis.testOnBorrow=true redis.timeout=100000 # 不需要加入缓存的类 targetNames=xxxRecordManager,xxxSetRecordManager,xxxStatisticsIdentificationManager # 不需要缓存的方法 methodNames= #设置缓存失效时间 com.service.impl.xxxRecordManager= 60 com.service.impl.xxxSetRecordManager= 60 defaultCacheExpireTime=3600 fep.local.cache.capacity =10000 要扫这些properties文件，在application.xml加入如下配置
<!-- 引入properties配置文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:properties/*.properties</value>
<!--要是有多个配置文件，只需在这里继续添加即可 -->
</list>
</property>
</bean>
3、一些工具类
package com.mucfc.msm.common;
import java.io.Serializable;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.apache.log4j.Logger;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
/**
* redis cache 工具类
*
*/
public final class RedisUtil {
private Logger logger = Logger.getLogger(RedisUtil.class);
private RedisTemplate<Serializable,Object> redisTemplate;
/**
* 批量删除对应的value
*
* @param keys
*/
public void remove(final String... keys) {
for (String key : keys) {
remove(key);
}
}
/**
* 批量删除key
*
* @param pattern
*/
public void removePattern(final String pattern) {
Set<Serializable> keys = redisTemplate.keys(pattern);
if (keys.size() > 0)
redisTemplate.delete(keys);
}
/**
* 删除对应的value
*
* @param key
*/
public void remove(final String key) {
if (exists(key)) {
redisTemplate.delete(key);
}
}
/**
* 判断缓存中是否有对应的value
*
* @param key
* @return
*/
public boolean exists(final String key) {
return redisTemplate.hasKey(key);
}
/**
* 读取缓存
*
* @param key
* @return
*/
public Object get(final String key) {
Object result = null;
ValueOperations<Serializable,Object> operations = redisTemplate
.opsForValue();
result = operations.get(key);
return result;
}
/**
* 写入缓存
*
* @param key
* @param value
* @return
*/
public boolean set(final String key,Object value) {
boolean result = false;
try {
ValueOperations<Serializable,Object> operations = redisTemplate
.opsForValue();
operations.set(key,value);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* 写入缓存
*
* @param key
* @param value
* @return
*/
public boolean set(final String key,Object value,Long expireTime) {
boolean result = false;
try {
ValueOperations<Serializable,value);
redisTemplate.expire(key,expireTime,TimeUnit.SECONDS);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
public void setRedisTemplate(
RedisTemplate<Serializable,Object> redisTemplate) {
this.redisTemplate = redisTemplate;
}
}
（2）MethodCacheInterceptor
package com.mucfc.msm.common;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.log4j.Logger;
public class MethodCacheInterceptor implements MethodInterceptor {
private Logger logger = Logger.getLogger(MethodCacheInterceptor.class);
private RedisUtil redisUtil;
private List<String> targetNamesList; // 不加入缓存的service名称
private List<String> methodNamesList; // 不加入缓存的方法名称
private Long defaultCacheExpireTime; // 缓存默认的过期时间
private Long xxxRecordManagerTime; //
private Long xxxSetRecordManagerTime; //
/**
* 初始化读取不需要加入缓存的类名和方法名称
*/
public MethodCacheInterceptor() {
try {
File f = new File("D:lunaJee-workspacemsmmsm_coresrcmainjavacommucfcmsmcommoncacheConf.properties");
//配置文件位置直接被写死，有需要自己修改下
InputStream in = new FileInputStream(f);
// InputStream in = getClass().getClassLoader().getResourceAsStream(
// "D:lunaJee-workspacemsmmsm_coresrcmainjavacommucfcmsmcommoncacheConf.properties");
Properties p = new Properties();
p.load(in);
// 分割字符串
String[] targetNames = p.getProperty("targetNames").split(",");
String[] methodNames = p.getProperty("methodNames").split(",");
// 加载过期时间设置
defaultCacheExpireTime = Long.valueOf(p.getProperty("defaultCacheExpireTime"));
xxxRecordManagerTime = Long.valueOf(p.getProperty("com.service.impl.xxxRecordManager"));
xxxSetRecordManagerTime = Long.valueOf(p.getProperty("com.service.impl.xxxSetRecordManager"));
// 创建list
targetNamesList = new ArrayList<String>(targetNames.length);
methodNamesList = new ArrayList<String>(methodNames.length);
Integer maxLen = targetNames.length > methodNames.length ? targetNames.length
: methodNames.length;
// 将不需要缓存的类名和方法名添加到list中
for (int i = 0; i < maxLen; i++) {
if (i < targetNames.length) {
targetNamesList.add(targetNames[i]);
}
if (i < methodNames.length) {
methodNamesList.add(methodNames[i]);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
Object value = null;
String targetName = invocation.getThis().getClass().getName();
String methodName = invocation.getMethod().getName();
// 不需要缓存的内容
//if (!isAddCache(StringUtil.subStrForLastDot(targetName),methodName)) {
if (!isAddCache(targetName,methodName)) {
// 执行方法返回结果
return invocation.proceed();
}
Object[] arguments = invocation.getArguments();
String key = getCacheKey(targetName,methodName,arguments);
System.out.println(key);
try {
// 判断是否有缓存
if (redisUtil.exists(key)) {
return redisUtil.get(key);
}
// 写入缓存
value = invocation.proceed();
if (value != null) {
final String tkey = key;
final Object tvalue = value;
new Thread(new Runnable() {
@Override
public void run() {
if (tkey.startsWith("com.service.impl.xxxRecordManager")) {
redisUtil.set(tkey,tvalue,xxxRecordManagerTime);
} else if (tkey.startsWith("com.service.impl.xxxSetRecordManager")) {
redisUtil.set(tkey,xxxSetRecordManagerTime);
} else {
redisUtil.set(tkey,defaultCacheExpireTime);
}
}
}).start();
}
} catch (Exception e) {
e.printStackTrace();
if (value == null) {
return invocation.proceed();
}
}
return value;
}
/**
* 是否加入缓存
*
* @return
*/
private boolean isAddCache(String targetName,String methodName) {
boolean flag = true;
if (targetNamesList.contains(targetName)
|| methodNamesList.contains(methodName)) {
flag = false;
}
return flag;
}
/**
* 创建缓存key
*
* @param targetName
* @param methodName
* @param arguments
*/
private String getCacheKey(String targetName,String methodName,Object[] arguments) {
StringBuffer sbu = new StringBuffer();
sbu.append(targetName).append("_").append(methodName);
if ((arguments != null) && (arguments.length != 0)) {
for (int i = 0; i < arguments.length; i++) {
sbu.append("_").append(arguments[i]);
}
}
return sbu.toString();
}
public void setRedisUtil(RedisUtil redisUtil) {
this.redisUtil = redisUtil;
}
}
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