1.首先准备好相应的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服务器密码，但是在tomcat配置文件中也要相对应
3.如何打算把项目做集群的话，需要修改tomcat的server.xml配置文件，保证集群里的tomcat服务器的端口都是唯一的
4.把准备好的Redis的jar包导入tomcat的lib文件夹里，把需要跑的项目打包成war包，放到tomcat的webapps目录下，需要保证各个tomcat的war包是相同的。5.配置Nginx：打开conf/nginx.conf文件。我以两台tomcat服务器为例，需要在该文件添加以下代码
即配置对应的端口和需要跑的项目。6.接下来配置项目里的sPRing-config.xml：在里面加入扫包的路径<context:component-scan base-package="com.xxl.common.redis" />，在对应的路径加入以下代码。
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;/** * 定义配置类注入容器（@Configuration等价于xml的beans） 启用缓存支持，定义一个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; } /** * 自定义缓存策略（保证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")); } }然后把两个tomcat跑起来，再启动nginx和Redis服务器，进入redis客户端：redis-cli.exe。如果想做到登录的唯一性可以在登录里加入以下代码/** * 缓存session到redis */ void redisSession(UserInfo userInfoDB, String sessionId) { // 将sessionid缓存到redis，防止一个账户多次登陆 if (null != redisTemplate.opsForValue().get(userInfoDB.getId() + "XxlUid")) { String redisValue = (String) redisTemplate.opsForValue().get(userInfoDB.getId() + "XxlUid"); // 删除之前用户sessionid redisTemplate.delete(redisValue); } redisTemplate.opsForValue().set(userInfoDB.getId() + "XxlUid", sessionId); }
如果为了减轻数据库端的负担，优化性能可以在业务层加入以下注解：
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询数据库以外，以后都是从redis数据库里面读取数据而不是MySQL数据库，allEntries=true的//意思是对数据进行了增删改后更新到mysql数据库 @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); } }
新闻热点
疑难解答
