基於JavaEE的SSM框架集成redis，我的項目架構是SpringMVC+Spring+Mybatis 用maven管理 ，下面看代碼.
我的項目結構:(項目下載鏈接:https://pan.baidu.com/s/1dZCV0u4qDLg5mjZHqHerHg)
1. 在pom.xml文件引入redis依賴包
<!-- redis集成spring -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.4.2.RELEASE</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20150729</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.2</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.8.5</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>org.json</artifactId>
<version>chargebee-1.0</version>
</dependency>2.web.xml中引入Redis的配置文件
<!-- 配置Redis環境 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-redis.xml</param-value>
</context-param>3.redis配置文件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:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"
default-autowire="byName" >
<context:property-placeholder location="classpath*:/redis.properties" ignore-unresolvable="true"/>
<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="${redis.maxIdle}" />
<property name="maxTotal" value="${redis.maxActive}" />
<property name="maxWaitMillis" value="${redis.maxWait}" />
<property name="testOnBorrow" value="${redis.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.pass}" />
<property name="poolConfig" ref="poolConfig" />
</bean>
<bean id="stringSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
<!-- 開啓事務，可以通過transcational註解控制 -->
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="connectionFactory" />
<property name="keySerializer" ref="stringSerializer" />
<property name="enableTransactionSupport" value="true" />
</bean>
</beans>4.redis.properties配置文件
redis.host=redis地址
redis.pass=密碼
redis.port=6379
redis.maxIdle=300
redis.maxActive=300
redis.maxTotal=600
redis.maxWait=1000
redis.testOnBorrow=true5. Spring配置文件applicationContext.xml中引入Redis的配置文件
在項目啓動的時候會加載applicationContext-redis.xml文件，但是redis.properties需要配置，如下
<bean id="config"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:/redis.properties</value>
</list>
</property>
</bean>6. 創建RedisService工具類，方便調用
package com.base.redis;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
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;
import org.springframework.data.redis.serializer.JacksonJsonRedisSerializer;
import org.springframework.stereotype.Service;
import com.base.utils.StringUtils;
@Service
public class RedisService {
private Logger LOG = LoggerFactory.getLogger(RedisService.class);
@Autowired
private List<RedisTemplate<String, String>> redisTemplateList;
@Autowired
private RedisTemplate<String, String> redisTemplate;
/**
* 從緩存中刪除指定的key
* @param keys
*/
public void del(final String... keys) {
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
redisTemplate.execute(new RedisCallback<Long>() {
public Long doInRedis(RedisConnection connection) throws DataAccessException {
long result = 0;
for (int i = 0; i < keys.length; i++) {
result = connection.del(keys[i].getBytes());
}
return result;
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 重緩存中刪除指定的key 模式匹配，效率低
* @param keys
*/
public void delByReg(final String... keys) {
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
redisTemplate.execute(new RedisCallback<Long>() {
public Long doInRedis(RedisConnection connection) throws DataAccessException {
long result = 0;
for (int i = 0; i < keys.length; i++) {
Set<byte[]> keyset = connection.keys((keys[i] + "*").getBytes());
for (byte[] key : keyset) {
result = connection.del(key);
}
}
return result;
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 判斷一個鍵是否存在於緩存中
* @param key
* @return
*/
public boolean exists(final String key) {
Boolean result = false;
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
result = (Boolean) redisTemplate.execute(new RedisCallback<Object>() {
public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
return connection.exists(key.getBytes());
}
});
if (result) {
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
/**
* 向緩存中插入數據
* @param key
* @param value
* @param liveTime
*/
public void set(final byte[] key, final byte[] value, final long liveTime) {
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
redisTemplate.execute(new RedisCallback<Object>() {
public Long doInRedis(final RedisConnection connection) throws DataAccessException {
connection.set(key, value);
if (liveTime > 0) {
connection.expire(key, liveTime);
}
return 1L;
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
public <T> void set(String key, T value, long liveTime, Class<T> type) {
if (value == null)
return;
try {
JacksonJsonRedisSerializer<T> serializer = new JacksonJsonRedisSerializer<T>(type);
byte[] _value = serializer.serialize(value);
this.set(key.getBytes(), _value, liveTime);
} catch (Exception e) {
e.printStackTrace();
}
}
public void set(String key, String value, long liveTime) {
try {
this.set(key.getBytes(), value.getBytes("UTF-8"), liveTime);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
public <T> List<T> lRange(final String key, final Long begin, final Long end, final Class<T> type) {
return redisTemplate.execute(new RedisCallback<List<T>>() {
public List<T> doInRedis(RedisConnection connection) throws DataAccessException {
JacksonJsonRedisSerializer<T> serializer = new JacksonJsonRedisSerializer<T>(type);
List<T> list = new ArrayList<T>();
for (byte[] element : connection.lRange(key.getBytes(), begin, end)) {
T bean = serializer.deserialize(element);
list.add(bean);
}
return list;
}
});
}
/**
* 從緩存中獲取數據
* @param key
* @return
*/
public String get(final String key) {
String cacheValue = "";
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
cacheValue = redisTemplate.execute(new RedisCallback<String>() {
public String doInRedis(RedisConnection connection) throws DataAccessException {
try {
byte[] cacheBytes = connection.get(key.getBytes());
if (cacheBytes != null) {
String cacheStr = new String(cacheBytes, "utf-8");
return cacheStr;
}
} catch (Exception e) {
LOG.info(e.getMessage());
}
return "";
}
});
if (!StringUtils.isEmpty(cacheValue))
break;
} catch (Exception e) {
e.printStackTrace();
}
}
return cacheValue;
}
public <T> T get(final String key, final Class<T> clazz) {
T t = null;
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
t = redisTemplate.execute(new RedisCallback<T>() {
public T doInRedis(RedisConnection connection) throws DataAccessException {
byte[] data = connection.get(key.getBytes());
if (data != null)
return new JacksonJsonRedisSerializer<T>(clazz).deserialize(data);
return null;
}
});
if (t != null)
break;
}
return t;
}
public <T> Long rPush(final String key, final List<T> list, final Class<T> type, final long expire) {
if (list == null) {
return 0L;
}
return redisTemplate.execute(new RedisCallback<Long>() {
public Long doInRedis(RedisConnection connection) throws DataAccessException {
JacksonJsonRedisSerializer<T> serializer = new JacksonJsonRedisSerializer<T>(type);
connection.multi();
for (T value : list) {
connection.rPush(key.getBytes(), serializer.serialize(value));
}
if (expire > 0) {
connection.expire(key.getBytes(), expire);
}
connection.exec();
return new Long(list.size());
}
});
}
/**
* 清空緩存
*/
public void flushDB() {
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
redisTemplate.execute(new RedisCallback<String>() {
public String doInRedis(RedisConnection connection) throws DataAccessException {
connection.flushDb();
return "ok";
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 添加至有序集合
* @param key
* @param score
* @param value
*/
public void zadd(final byte[] key, final double score, final byte[] value) {
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
redisTemplate.execute(new RedisCallback<String>() {
public String doInRedis(RedisConnection connection) throws DataAccessException {
connection.zAdd(key, score, value);
return "ok";
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 按條件獲取有序集合元素子集
* @param key
* 有序集合key
* @param min
* 範圍最小值
* @param max
* 範圍最大值
* @param offset
* 從第0ffset+1個元素起
* @param count
* 返回上限
* @return
*/
public Set<byte[]> zRangeByScore(final byte[] key, final double min, final double max, final long offset,
final long count) {
Set<byte[]> set = null;
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
set = redisTemplate.execute(new RedisCallback<Set<byte[]>>() {
public Set<byte[]> doInRedis(RedisConnection connection) throws DataAccessException {
return connection.zRangeByScore(key, min, max, offset, count);
}
});
if (set != null) {
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
return set;
}
/**
* 添加指定map至緩存
* @param key map唯一標識
* @param hashes
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public void hMSet(final byte[] key, final Map<byte[], byte[]> hashes) {
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
redisTemplate.execute(new RedisCallback() {
public Object doInRedis(RedisConnection connection) throws DataAccessException {
connection.hMSet(key, hashes);
return null;
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 獲取指定map中指定鍵對應的值列表
* @param key map的唯一標識
* @param fields 鍵數組
* @return 值數組
*/
public List<byte[]> hMGet(final byte[] key, final byte[]... fields) {
List<byte[]> cacheValue = null;
for (RedisTemplate<String, String> redisTemplate : redisTemplateList) {
try {
cacheValue = redisTemplate.execute(new RedisCallback<List<byte[]>>() {
public List<byte[]> doInRedis(RedisConnection connection) throws DataAccessException {
return connection.hMGet(key, fields);
}
});
if (cacheValue != null) {
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
return cacheValue;
}
// getters and setters
public List<RedisTemplate<String, String>> getRedisTemplateList() {
return redisTemplateList;
}
public void setRedisTemplateList(List<RedisTemplate<String, String>> redisTemplateList) {
this.redisTemplateList = redisTemplateList;
}
}