Reuse StringRedisSerializer instance

Author: quaff

spring-session-data-redis/src/main/java/org/springframework/session/data/redis/config/annotation/web/http/AbstractRedisHttpSessionConfiguration.java

@@ -29,7 +29,6 @@
 import org.springframework.data.redis.connection.RedisConnectionFactory;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.serializer.RedisSerializer;
-import org.springframework.data.redis.serializer.StringRedisSerializer;
 import org.springframework.session.FlushMode;
 import org.springframework.session.MapSession;
 import org.springframework.session.SaveMode;
@@ -46,6 +45,7 @@
  *
  * @param <T> the {@link SessionRepository} type
  * @author Vedran Pavic
+ * @author Yanming Zhou
  * @since 3.0.0
  * @see RedisHttpSessionConfiguration
  * @see RedisIndexedHttpSessionConfiguration
@@ -153,8 +153,8 @@ public void setBeanClassLoader(ClassLoader classLoader) {
 
 	protected RedisTemplate<String, Object> createRedisTemplate() {
 		RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
-		redisTemplate.setKeySerializer(new StringRedisSerializer());
-		redisTemplate.setHashKeySerializer(new StringRedisSerializer());
+		redisTemplate.setKeySerializer(RedisSerializer.string());
+		redisTemplate.setHashKeySerializer(RedisSerializer.string());
 		if (getDefaultRedisSerializer() != null) {
 			redisTemplate.setDefaultSerializer(getDefaultRedisSerializer());
 		}

spring-session-data-redis/src/main/java/org/springframework/session/data/redis/config/annotation/web/server/RedisWebSessionConfiguration.java

@@ -37,7 +37,6 @@
 import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
 import org.springframework.data.redis.serializer.RedisSerializationContext;
 import org.springframework.data.redis.serializer.RedisSerializer;
-import org.springframework.data.redis.serializer.StringRedisSerializer;
 import org.springframework.session.MapSession;
 import org.springframework.session.SaveMode;
 import org.springframework.session.config.ReactiveSessionRepositoryCustomizer;
@@ -54,6 +53,7 @@
  * Bean.
  *
  * @author Vedran Pavic
+ * @author Yanming Zhou
  * @since 2.0.0
  * @see EnableRedisWebSession
  */
@@ -159,7 +159,7 @@ public void setImportMetadata(AnnotationMetadata importMetadata) {
 	}
 
 	private ReactiveRedisTemplate<String, Object> createReactiveRedisTemplate() {
-		RedisSerializer<String> keySerializer = new StringRedisSerializer();
+		RedisSerializer<String> keySerializer = RedisSerializer.string();
 		RedisSerializer<Object> defaultSerializer = (this.defaultRedisSerializer != null) ? this.defaultRedisSerializer
 				: new JdkSerializationRedisSerializer(this.classLoader);
 		RedisSerializationContext<String, Object> serializationContext = RedisSerializationContext