# Redis在Java中的操作 #### 1.配置Jedis环境 \`\`\`java redis.clients jedis 2.8.0 \`\`\` #### 2.springboot项目配置redis环境 \`\`\`java org.springframework.boot spring-boot-starter-data-redis 3.1.2 compile \`\`\` #### 3.普通maven项目使用Jedis \`\`\`java public class JedisTest { @Test public void testRedis(){ //1.获取连接 Jedis jedis = new Jedis("localhost"); //2. 执行具体的操作 jedis.set("username","xiaoming"); String value = jedis.get("username"); System.out.println(value); jedis.hset("myhash","test1","bj"); String hValue = jedis.hget("myhash", "test1"); System.out.println(hValue); Set keys = jedis.keys("\*"); for(String key : keys){ System.out.println(key); } //3. 关闭连接 jedis.close(); } } \`\`\` #### 4.SpringBoot项目使用Jedis ##### 4.1 在application.yml中设置以下配置 \`\`\`java spring: application: #应用名称：可选 name: springdataredis_demo #Redis相关配置 redis: host: localhost port: 6379 #password: a1234567 database: 0 #操作的是0号数据库 jedis: #Redis.连接池配置 pool: max-active: 8 #最大连接数 maX-wait: 1ms #连接池最大阻塞等待时间 maX-id几e: 4 #连接池中的最大空闲连接 min-id几e: 0 #连接池中的最小空闲连接 \`\`\` ##### 4.2 Redis配置类(RedisConfig.java)：配置Redis的Key序列化器，values可不设，因为在java程序中输出时会自动反序列化 \`\`\`java /\*\* \* Redis配置类 \*/ @Configuration public class RedisConfig extends CachingConfigurerSupport { @Bean public RedisTemplate redisTemplate(RedisConnectionFactory connectionFactory) { RedisTemplate redisTemplate = new RedisTemplate\<\>(); //默认的Key序列化器为：JdkSerializationRedisSerializer redisTemplate.setKeySerializer(new StringRedisSerializer()); redisTemplate.setHashKeySerializer(new StringRedisSerializer()); redisTemplate.setConnectionFactory(connectionFactory); return redisTemplate; } } \`\`\` ##### 4.3 SpringBoot中使用Redis \`\`\`java @SpringBootTest @RunWith(SpringRunner.class) public class SpringDataRedisTest { @Autowired private RedisTemplate redisTemplate; /\*\* \* @description: 操作String类型数据 \* @param: \[\] \* @return: void \* @date: 2023/11/2 22:26 \*\*/ @Test public void testString(){ redisTemplate.opsForValue().set("city","beijing"); String value = (String) redisTemplate.opsForValue().get("city"); System.out.println(value); //SETEX key seconds value :设置指定key的值，并将key的过期时间设为seconds秒 redisTemplate.opsForValue().set("key1","value1",20l, TimeUnit.SECONDS); //SETNX key value :只有在key不存在时设置key的值 Boolean aBoolean = redisTemplate.opsForValue().setIfAbsent("name1", "xiaoming"); System.out.println(aBoolean); } /\*\* \* 操作Hash类型数据 \*/ @Test public void testHash(){ HashOperations hashOperations = redisTemplate.opsForHash(); //存值 hashOperations.put("002","name","xiaoming"); hashOperations.put("002","age","20"); hashOperations.put("002","address","bj"); //取值 String age = (String) hashOperations.get("002", "age"); System.out.println(age); //获得hash结构中的所有字段 Set keys = hashOperations.keys("002"); for (Object key : keys) { System.out.println(key); } //获得hash结构中的所有值 List values = hashOperations.values("002"); for (Object value : values) { System.out.println(value); } } /\*\* \* 操作List类型的数据 \*/ @Test public void testList(){ ListOperations listOperations = redisTemplate.opsForList(); //存值 listOperations.leftPush("mylist","a"); listOperations.leftPushAll("mylist","b","c","d"); //取值 List mylist = listOperations.range("mylist", 0, -1); for (String value : mylist) { System.out.println(value); } //获得列表长度 llen Long size = listOperations.size("mylist"); int lSize = size.intValue(); for (int i = 0; i \< lSize; i++) { //出队列 String element = (String) listOperations.rightPop("mylist"); System.out.println(element); } } /\*\* \* 操作Set类型的数据 \*/ @Test public void testSet(){ SetOperations setOperations = redisTemplate.opsForSet(); //存值 setOperations.add("myset","a","b","c","a"); //取值 Set myset = setOperations.members("myset"); for (String o : myset) { System.out.println(o); } //删除成员 setOperations.remove("myset","a","b"); //取值 myset = setOperations.members("myset"); for (String o : myset) { System.out.println(o); } } /\*\* \* 操作ZSet类型的数据 \*/ @Test public void testZset(){ ZSetOperations zSetOperations = redisTemplate.opsForZSet(); //存值 zSetOperations.add("myZset","a",10.0); zSetOperations.add("myZset","b",11.0); zSetOperations.add("myZset","c",12.0); zSetOperations.add("myZset","a",13.0); //取值 Set myZset = zSetOperations.range("myZset", 0, -1); for (String s : myZset) { System.out.println(s); } //修改分数 zSetOperations.incrementScore("myZset","b",20.0); //取值 myZset = zSetOperations.range("myZset", 0, -1); for (String s : myZset) { System.out.println(s); } //删除成员 zSetOperations.remove("myZset","a","b"); //取值 myZset = zSetOperations.range("myZset", 0, -1); for (String s : myZset) { System.out.println(s); } } /\*\* \* 通用操作，针对不同的数据类型都可以操作 \*/ @Test public void testCommon(){ //获取Redis中所有的key Set keys = redisTemplate.keys("\*"); for (String key : keys) { System.out.println(key); } //判断某个key是否存在 Boolean itcast = redisTemplate.hasKey("itcast"); System.out.println(itcast); //删除指定key redisTemplate.delete("myZset"); //获取指定key对应的value的数据类型 DataType dataType = redisTemplate.type("myset"); System.out.println(dataType.name()); } } \`\`\`