©2020-2024 ioDraw All rights reserved,
Privacy Policy
Redis的valus值的五种数据类型
问题：Windows下出现Could not connect to Redis at 127.0.0.1:6379: 由于目标计算机积极拒绝，无法连接。
解决方法为在Redis-x64-3.2.100目录下打开两个cmd窗口，分别输入 命令redis-server.exe redis.windows.conf
和 命令redis-cli ，即可成功连接。
字符串string操作命令
哈希hash操作命令
列表list操作命令
集合set操作命令
通用命令
使用Spring Data Redis操作Redis
springboot集成Redis
* 首先在maven的pom文件中引入 Spring Data Redis 模块，代码如下。 <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId> </dependency>
* 然后，在springboot的配置文件中写入redis配置，代码如下。 spring: application: name:redisdemo
#Redis相关配置 redis: host: localhost port: 6379 #password: database: 0 jedis:
#Redis 连接池配置 pool: max-active: 8 #最大连接数 max-idle: 4 #连接池中最大空闲连接 max-wait: 1ms
#连接池最大阻塞等待时间 min-idle: 0 #连接池中最小空闲连接
*
然后，处理keys的序列化问题，config中创建配置文件，其大致内容是更换redis对keys的序列化方式，然后返回RedisTemplate对象，放入Spring容器当中，代码如下。
/** * Redis配置类 */ @Configuration public class RedisConfig extends
CachingConfigurerSupport { @Bean public RedisTemplate<Object, Object>
redisTemplate(RedisConnectionFactory connectionFactory) { RedisTemplate<Object,
Object> 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; } }
* 最后，业务逻辑代码如下。 @SpringBootTest // SpringRunner 是 Spring Test 模块提供的一个测试运行器， //
它能够集成 Spring 框架和 JUnit，使得在测试过程中可以使用 Spring 的功能，如依赖注入、事务管理等。
@RunWith(SpringRunner.class) class RedisdemoApplicationTests { @Autowired
private RedisTemplate redisTemplate; @Test public void testString() {
redisTemplate.opsForValue().set("city123", "beijing"); } }
Spring Data Redis对Redis的具体操作
操作String类型数据
@Test public void testString(){
redisTemplate.opsForValue().set("city123","beijing"); String value = (String)
redisTemplate.opsForValue().get("city123"); System.out.println(value);
redisTemplate.opsForValue().set("key1","value1",10l, TimeUnit.SECONDS); Boolean
aBoolean = redisTemplate.opsForValue().setIfAbsent("city1234", "nanjing");
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<String> 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<String> 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<String> 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<String> 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()); }