1.pom.xml添加依赖：
<!-- 数据库session管理 -->
<dependency><groupId>org.springframework.session</groupId><artifactId>spring-session-jdbc</artifactId>
</dependency>
2.application.properties添加配置
spring.session.store-type=jdbc
3.需要在数据库中创建两张表：
DROP TABLE IF EXISTS SPRING_SESSION_ATTRIBUTES;
DROP TABLE IF EXISTS SPRING_SESSION;
CREATE TABLE SPRING_SESSION (PRIMARY_ID CHAR(36) NOT NULL,SESSION_ID CHAR(36) NOT NULL,CREATION_TIME BIGINT NOT NULL,LAST_ACCESS_TIME BIGINT NOT NULL,MAX_INACTIVE_INTERVAL INT NOT NULL,EXPIRY_TIME BIGINT NOT NULL,PRINCIPAL_NAME VARCHAR(100),CONSTRAINT SPRING_SESSION_PK PRIMARY KEY (PRIMARY_ID)
) ENGINE=INNODB ROW_FORMAT=DYNAMIC;CREATE UNIQUE INDEX SPRING_SESSION_IX1 ON SPRING_SESSION (SESSION_ID);
CREATE INDEX SPRING_SESSION_IX2 ON SPRING_SESSION (EXPIRY_TIME);
CREATE INDEX SPRING_SESSION_IX3 ON SPRING_SESSION (PRINCIPAL_NAME);CREATE TABLE SPRING_SESSION_ATTRIBUTES (SESSION_PRIMARY_ID CHAR(36) NOT NULL,ATTRIBUTE_NAME VARCHAR(200) NOT NULL,ATTRIBUTE_BYTES BLOB NOT NULL,CONSTRAINT SPRING_SESSION_ATTRIBUTES_PK PRIMARY KEY (SESSION_PRIMARY_ID, ATTRIBUTE_NAME),CONSTRAINT SPRING_SESSION_ATTRIBUTES_FK FOREIGN KEY (SESSION_PRIMARY_ID) REFERENCES SPRING_SESSION(PRIMARY_ID) ON DELETE CASCADE
) ENGINE=INNODB ROW_FORMAT=DYNAMIC;