1.首先準(zhǔn)備好相應(yīng)的jar包

2.修改apache-tomcat/conf/context.xml,在后面加上以下部分，以下部分可以在里面添加redis服務(wù)器密碼，但是在tomcat配置文件中也要相對(duì)應(yīng)

3.如何打算把項(xiàng)目做集群的話，需要修改tomcat的server.xml配置文件，保證集群里的tomcat服務(wù)器的端口都是唯一的

4.把準(zhǔn)備好的Redis的jar包導(dǎo)入tomcat的lib文件夾里，把需要跑的項(xiàng)目打包成war包，放到tomcat的webapps目錄下，需要保證各個(gè)tomcat的war包是相同的。5.配置Nginx：打開(kāi)conf/nginx.conf文件。我以?xún)膳_(tái)tomcat服務(wù)器為例，需要在該文件添加以下代碼

即配置對(duì)應(yīng)的端口和需要跑的項(xiàng)目。6.接下來(lái)配置項(xiàng)目里的sPRing-config.xml：在里面加入掃包的路徑<context:component-scan base-package="com.xxl.common.redis" />，在對(duì)應(yīng)的路徑加入以下代碼。

package com.xxl.common.redis;import org.springframework.cache.CacheManager;import org.springframework.cache.annotation.CachingConfigurerSupport;import org.springframework.cache.annotation.EnableCaching;import org.springframework.cache.interceptor.KeyGenerator;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.data.redis.cache.RedisCacheManager;import org.springframework.data.redis.connection.RedisConnectionFactory;import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.data.redis.serializer.StringRedisSerializer;import java.lang.reflect.Method;/** * 定義配置類(lèi)注入容器（@Configuration等價(jià)于xml的beans） 啟用緩存支持，定義一個(gè)RedisCacheManager管理bean *  * @author Administrator * */@Configuration@EnableCachingpublic class RedisCacheConfig extends CachingConfigurerSupport {    private static final String host = "127.0.0.1";    private static final int port = 6379;    //private static final String pwd = "abcd6666";    @Bean(name = "redisConnectionFactory")    public JedisConnectionFactory redisConnectionFactory() {        JedisConnectionFactory redisConnectionFactory = new JedisConnectionFactory();        redisConnectionFactory.setHostName(host);        redisConnectionFactory.setPort(port);        //redisConnectionFactory.setPassWord(pwd);        return redisConnectionFactory;    }    @Bean(name = "redisTemplate")    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory cf) {        RedisTemplate<String, String> redisTemplate = new RedisTemplate<String, String>();        redisTemplate.setConnectionFactory(cf);        redisTemplate.setKeySerializer(new StringRedisSerializer());        redisTemplate.setValueSerializer(new StringRedisSerializer());        redisTemplate.setHashKeySerializer(new StringRedisSerializer());        redisTemplate.setHashValueSerializer(new StringRedisSerializer());        return redisTemplate;    }    @Bean    public CacheManager cacheManager(RedisTemplate redisTemplate) {        RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);        cacheManager.setDefaultExpiration(7200);        return cacheManager;    }    /**     * 自定義緩存策略（保證key值的唯一性）     *      * @return     */    @Bean    public KeyGenerator customKeyGenerator() {        return new KeyGenerator() {            @Override            public Object generate(Object o, Method method, Object... objects) {                StringBuilder sb = new StringBuilder();                sb.append(o.getClass().getName());                sb.append(method.getName());                for (Object obj : objects) {                    sb.append(obj.toString());                }                return sb.toString();            }        };    }}
package com.xxl.common.redis;import org.springframework.context.applicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import org.springframework.data.redis.connection.RedisConnectionFactory;import org.springframework.data.redis.core.RedisTemplate;public class RedisService {        public static ApplicationContext ctx;        public static RedisConnectionFactory redisConnectionFactory;        public static RedisTemplate<String, String> redis;        public static void main(String[] args) {        ctx = new ClassPathXmlApplicationContext("spring-config.xml");        redis = ctx.getBean("redisTemplate", RedisTemplate.class);        redis.opsForHash().put("b", "1", "fff");        String key = (String) redis.opsForHash().get("b","1");        System.err.println(key);        //redis.delete(key);        //System.out.println(redis);        //redis.opsForValue().set("xman", "abc");        //System.err.println(redis.opsForValue().get("xman"));    }    }然后把兩個(gè)tomcat跑起來(lái)，再啟動(dòng)nginx和Redis服務(wù)器，進(jìn)入redis客戶(hù)端：redis-cli.exe。如果想做到登錄的唯一性可以在登錄里加入以下代碼
/**     * 緩存session到redis     */    void redisSession(UserInfo userInfoDB, String sessionId) {        // 將sessionid緩存到redis，防止一個(gè)賬戶(hù)多次登陸        if (null != redisTemplate.opsForValue().get(userInfoDB.getId() + "XxlUid")) {            String redisValue = (String) redisTemplate.opsForValue().get(userInfoDB.getId() + "XxlUid");            // 刪除之前用戶(hù)sessionid            redisTemplate.delete(redisValue);        }        redisTemplate.opsForValue().set(userInfoDB.getId() + "XxlUid", sessionId);    }
如果為了減輕數(shù)據(jù)庫(kù)端的負(fù)擔(dān)，優(yōu)化性能可以在業(yè)務(wù)層加入以下注解：
package com.xxl.common.bo;import java.util.List;import javax.annotation.Resource;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.cache.annotation.CacheEvict;import org.springframework.cache.annotation.Cacheable;import org.springframework.stereotype.Service;import com.xxl.common.dao.IRedisTestDao;import com.xxl.common.entity.RedisTest;@Service("redisTestBo")public class RedisTestBo implements IRedisTestBo {        private final Log logger = LogFactory.getLog(this.getClass());        @Resource      private IRedisTestDao redisTestDao;//下面注解表示除了第一次直接查詢(xún)數(shù)據(jù)庫(kù)以外，以后都是從redis數(shù)據(jù)庫(kù)里面讀取數(shù)據(jù)而不是MySQL數(shù)據(jù)庫(kù)，allEntries=true的//意思是對(duì)數(shù)據(jù)進(jìn)行了增刪改后更新到mysql數(shù)據(jù)庫(kù)    @CacheEvict(value = { "selectByCode"}, allEntries = true)    public int deleteByCode(String code) {        logger.debug("every body 一起嗨 // delete");        redisTestDao.deleteByCode(code);        return 1;    }    @CacheEvict(value = { "selectByCode"}, allEntries = true)    public int insert(RedisTest redisTest) {        logger.debug("every body 一起嗨 // add");        return redisTestDao.insert(redisTest);    }        @Cacheable("selectByCode")    public List<RedisTest> selectByCode(String code) {        logger.debug("every body 一起嗨 // read");        return redisTestDao.selectByCode(code);    }        @CacheEvict(value = { "selectByCode"}, allEntries = true)    public int updateById(RedisTest redisTest) {        logger.debug("every body 一起嗨 // update");        return redisTestDao.updateById(redisTest);    }    }