SpringBoot 整合 springDataRedis

一、添加依赖：

1 <dependency>
2             <groupId>org.springframework.boot</groupId>
3             <artifactId>spring-boot-starter-data-redis</artifactId>
4 </dependency>

二、redis 配置：

 1 #服务器数据库
 2 spring.redis.database=0
 3 
 4 #ip地址
 5 spring.redis.host=localhost
 6 
 7 #端口号
 8 spring.redis.port=6379
 9 
10 #密码
11 spring.redis.password=
12 
13 #客户端超时时间(毫秒)，默认是2000
14 spring.redis.timeout=6000
15 
16 #Redis 连接池
17 #连接池的最大连接数（0表示没有限制）
18 spring.redis.jedis.pool.max-active=100
19 
20 #连接池最大阻塞等待时间（0表示没有限制）
21 spring.redis.jedis.pool.max-wait=-1
22 
23 #连接池中最大空闲连接
24 spring.redis.jedis.pool.max-idle=10
25 
26 #连接池中最小空闲连接
27 spring.redis.jedis.pool.min-idle=0

三、RedisTemplate & StringRedisTemplate：前者默认使用JDKSerializationRedisSerializer序列化key-value，后者使用StringRedisSerializer序列化key-value。注意两者的数据不共享，只能管理自己的数据。StringRedisTemplate 继承了 RedisTemplate 设置了不同的序列化策略。

　　1、RedisTemplate：

 1 public class RedisTemplate<K, V> extends RedisAccessor implements RedisOperations<K, V>, BeanClassLoaderAware {
 2     private boolean enableTransactionSupport = false;
 3     private boolean exposeConnection = false;
 4     private boolean initialized = false;
 5     private boolean enableDefaultSerializer = true;
 6     ...
 7     public void afterPropertiesSet() {
 8         super.afterPropertiesSet();
 9         boolean defaultUsed = false;
10         if (this.defaultSerializer == null) {
11             this.defaultSerializer = new JdkSerializationRedisSerializer(this.classLoader != null ? this.classLoader : this.getClass().getClassLoader());
12         }
13       ...
14   }
15     ...
16 
17 }

　　2、StringRedisTemplate：

1 public class StringRedisTemplate extends RedisTemplate<String, String> {
2     public StringRedisTemplate() {
3         this.setKeySerializer(RedisSerializer.string());
4         this.setValueSerializer(RedisSerializer.string());
5         this.setHashKeySerializer(RedisSerializer.string());
6         this.setHashValueSerializer(RedisSerializer.string());
7     }
8         ...
9 }    

四、RedisTemplate & StringRedisTemplate 实战：

　　1、RedisTemplate & StringRedisTemplate ：使用默认的序列化策略，在存储上的差异

 1 @RestController
 2 public class RedisTemplateStringRedisTemplateDemo {
 3 
 4     @Autowired
 5     private RedisTemplate redisTemplate;
 6 
 7     @Autowired
 8     private StringRedisTemplate stringRedisTemplate;
 9 
10     @RequestMapping("/user/{id}") // id = 001
11     public String getUserById(@PathVariable(required = false,name = "id") String id){
12         Boolean keyExists = redisTemplate.hasKey(id);
13         User user = null;　　//User.calss implements Serializable 支持序列化
14         if(keyExists){
15             user =  (User)redisTemplate.opsForValue().get(id);// 获取对象
16             String userStr = stringRedisTemplate.opsForValue().get(id); //获取字符串
17             System.out.println("userStr" + userStr);
18         }else{
19             user = new User();
20             user.setAge("18");
21             user.setName("cxy");
22             user.setSex("男");
23             redisTemplate.opsForValue().set(id,  user);//默认使用JDKSerializationRedisSerializer序列化来存储key-value
24             stringRedisTemplate.opsForValue().set(id, user.toString());//使用StringRedisSerializer序列化存储key-value,所以在服务器中存储的是字符串
25         }
26         return user.toString();
27     }
28 
29 }

　　2、自定义序列化策略：

 1 @Configuration
 2 public class MyRedisTemplateConfig {
 3 
 4     @Bean("strRedisTemplate")
 5     public RedisTemplate<Object, Object> strRedisTemplate(RedisConnectionFactory redisConnectionFactory){
 6         RedisTemplate<Object,Object> template = new RedisTemplate<Object, Object>();
 7         template.setConnectionFactory(redisConnectionFactory);
 8         RedisSerializer<String> stringRedisSerializer = new StringRedisSerializer();
 9         template.setKeySerializer(stringRedisSerializer);// 修改key的存储方式为String
10         return template;
11     }
12 }

 1 @RestController
 2 public class RedisTemplateStringRedisTemplateDemo {
 3 
 4     @Autowired
 5     @Qualifier("strRedisTemplate")
 6     private RedisTemplate redisTemplate;
 7 
 8     //@Autowired
 9     //private StringRedisTemplate stringRedisTemplate;
10 
11     @RequestMapping("/user/{id}")
12     public String getUserById(@PathVariable(required = false,name = "id") String id){
13         Boolean keyExists = redisTemplate.hasKey(id);
14         User user = null;
15         if(keyExists){
16             user =  (User)redisTemplate.opsForValue().get(id);
17            // String userStr = stringRedisTemplate.opsForValue().get(id);
18            //System.out.println("userStr" + userStr);
19         }else{
20             user = new User();
21             user.setAge("18");
22             user.setName("cxy");
23             user.setSex("男");
24             redisTemplate.opsForValue().set(id,  user);
25             //stringRedisTemplate.opsForValue().set(id, user.toString());
26         }
27         return user.toString();
28     }
29 
30 }