Spring|SpringBoot学习（五）--SpringBoot集成redis缓存及redis客户端从零开始|spring|redis|缓存|redi

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本系列文章目录地址：http://blog.csdn.net/u011961421/article/details/79416510

简介 redis是一个高性能的key-value内存数据库，通常被称为数据结构服务器，因为值（value）可以是字符串(String), 哈希(Map), 列表(list), 集合(sets) 和有序集合(sorted sets)等类型，在如今系统不断追求高并发、高效率的大环境下，redis被广泛使用。
实战 redis官方版本为Linux版本，在官网下载解压即可，windows下安装redis请参考（http://blog.csdn.net/u011961421/article/details/78862249）。在实际工作中，申请到redis机器后，同样可以按以下方式配置，redis集群这里暂不拓展。
在前工程基础上（即前四个学习目录，工程git地址为https://github.com/15651037763/cms），SpringBoot本身对redis做了扩展，集成redis要简便的多。
1.pom.xml引入redis包

org.springframework.boot spring-boot-starter-redis

spring-boot-starter-redis也是对jedis做了封装。
2.配置redis
两种方式配置redis，第一种，在application.yml中加入redis配置：

spring: redis: database: 2 host: 127.0.0.1 port: 6379 #password timeout: 5000 pool: # 最大空闲连接数 max-idle: 8 # 最小空闲连接数 min-idle: 0 # 最大活跃连接数 max-active: 8 # 获取连接时的最大等待毫秒数(-1阻塞不确定的时间) max-wait: -1

【Spring|SpringBoot学习（五）--SpringBoot集成redis缓存及redis客户端】第二种方式可以通过@Configuration编写配置类：

@Configuration @EnableAutoConfiguration public class RedisConfiguration { private static final Logger log = LoggerFactory.getLogger(RedisConfiguration.class); @Bean public JedisPoolConfig jedisPoolConfig() { JedisPoolConfig pool = new JedisPoolConfig(); pool.setMaxIdle(8); pool.setMinIdle(0); pool.setMaxTotal(8); pool.setMaxWaitMillis(-1); log.info("JedisPoolConfig bean init success."); return pool; }@Bean public JedisConnectionFactory connectionFactory() { JedisConnectionFactory connectionFactory = new JedisConnectionFactory(); connectionFactory.setPoolConfig(jedisPoolConfig()); connectionFactory.setHostName("127.0.0.1"); connectionFactory.setDatabase(2); connectionFactory.setPort(6379); connectionFactory.setTimeout(5000); log.info("JedisConnectionFactory bean init success."); return connectionFactory; }@Bean public RedisTemplate redisTemplate() { log.info("RedisTemplate bean init success."); return new StringRedisTemplate(connectionFactory()); } }

未配置redis的情况下，jedis会查找默认本地和默认端口的连接，默认配置可以在Connection.class看到，如下：

public class Connection implements Closeable { private static final byte[][] EMPTY_ARGS = new byte[0][]; private String host = "localhost"; private int port = 6379; private Socket socket; private RedisOutputStream outputStream; private RedisInputStream inputStream; private int pipelinedCommands = 0; private int connectionTimeout = 2000; private int soTimeout = 2000; private boolean broken = false; private boolean ssl; private SSLSocketFactory sslSocketFactory; private SSLParameters sslParameters; private HostnameVerifier hostnameVerifier; public Connection() { }public Connection(String host) { this.host = host; } ... ...

3.封装StringRedisTemplate
StringRedisTemplate是Spring继承RedisTemplate基础上封装的操作模板，两者之间的区别可以参考（http://blog.csdn.net/notsaltedfish/article/details/75948281），为了方便自己使用，再做一次封装，也有利于了解StringRedisTemplate的API。

public class RedisManagerImpl implements RedisManager { @Autowired private StringRedisTemplate redisTemp; @Override public String getStr(String key) { return redisTemp.opsForValue().get(key); }@Override public String getSubStr(String key, long start, long end) { return redisTemp.opsForValue().get(key, start, end); }@Override public void setStr(String key, String value) { redisTemp.opsForValue().set(key, value); }@Override public void setStrAndExpire(String key, String value, long timeout) { redisTemp.opsForValue().set(key, value, timeout, TimeUnit.SECONDS); }@Override public void setStrAndCover(String key, String value, long offset) { redisTemp.opsForValue().set(key, value, offset); }@Override public boolean setStrIfAbsent(String key, String value) { return redisTemp.opsForValue().setIfAbsent(key, value); }@Override public void multiSetStr(Map params) { redisTemp.opsForValue().multiSet(params); }@Override public boolean multiSetStrIfAbsent(Map params) { return redisTemp.opsForValue().multiSetIfAbsent(params); }@Override public long getExpire(String key) { return redisTemp.getExpire(key); }@Override public boolean setExpire(String key, long timeout) { return redisTemp.expire(key, timeout, TimeUnit.SECONDS); }@Override public boolean hasKey(String key) { return redisTemp.hasKey(key); }@Override public void delete(String key) { redisTemp.delete(key); }@Override public void multiDelete(List keys) { redisTemp.delete(keys); }@Override public boolean renameKeyIfAbsent(String oldKey, String newKey) { return redisTemp.renameIfAbsent(oldKey, newKey); }@Override public boolean hasHashKey(String key, Object hashKey) { return redisTemp.opsForHash().hasKey(key, hashKey); }@Override public Object hashGet(String key, Object hashKey) { return redisTemp.opsForHash().get(key, hashKey); }@Override public Map getHashMap(String key) { return redisTemp.opsForHash().entries(key); }@Override public long hashDelete(String key, Object... hashKeys) { return redisTemp.opsForHash().delete(key, hashKeys); }@Override public void hashPut(String key, Object hashKey, Object hashValue) { redisTemp.opsForHash().put(key, hashKey, hashValue); }@Override public boolean hashPutIfAbsent(String key, Object hashKey, Object hashValue) { return redisTemp.opsForHash().putIfAbsent(key, hashKey, hashValue); }@Override public void setHashMap(String key, HashMap map) { redisTemp.opsForHash().putAll(key, map); }@Override public List getList(String key) { return redisTemp.opsForList().range(key, 0, -1); }@Override public void leftListPush(String key, String... values) { redisTemp.opsForList().leftPushAll(key, values); }@Override public void leftSetList(String key, List value) { redisTemp.opsForList().leftPushAll(key, value); }@Override public void rightListPush(String key, String... values) { redisTemp.opsForList().rightPushAll(key, values); }@Override public void rightSetList(String key, List value) { redisTemp.opsForList().rightPushAll(key, value); }@Override public String leftListPop(String key) { return redisTemp.opsForList().leftPop(key); }@Override public String rightListPop(String key) { return redisTemp.opsForList().rightPop(key); }@Override public void ListRemove(String key, long count, Object value) { redisTemp.opsForList().remove(key, count, value); } }

4.测试，编写Demo方法，验证redis，如下图

@RequestMapping(method = RequestMethod.GET, value = "https://www.it610.com/testRedis") @ResponseBody public String testRedis(String key) { System.out.println("入参key为:"+key); String s = ""; if(!StringUtils.isEmpty(key)) { s = "查询结果为:"+redisManager.getStr(key); } return s; }