<dependency>

      <groupId>org.springframework.boot</groupId>

      <artifactId>spring-boot-starter-data-redis</artifactId>

</dependency>

  redis:

    host: 127.0.0.1

@Autowired

private RedisTemplate redisTemplate;

int i=1;

　　/**

     * 根据ID查询实体

     * @param id

     * @return

     */

    public Article findById(String id) {

        System.out.println("查询次数:"+i++);

        //先从缓存中查询当前对象

        Article article=(Article)redisTemplate.opsForValue().get("article_"+id);

        //如果没有取到

        if(article==null){

            //从数据库中查询

            article=articleDao.findById(id).get();

            //存入到缓存中

            redisTemplate.opsForValue().set("article_"+id,article);

        }

        return article;

    }

查询次数:1

Hibernate: select article0_.id as id1_0_0_, article0_.channelid as channeli2_0_0_ from tb_article article0_ where article0_.id=?

查询次数:2

查询次数:3

查询次数:4

    /**

     * 修改

     * @param article

     */

    public void update(Article article) {

        redisTemplate.delete("article_"+article.getId());

        articleDao.save(article);

    }

    /**

     * 删除

     * @param id

     */

    public void deleteById(String id) {

        redisTemplate.delete("article_"+id);

        articleDao.deleteById(id);

    }

查询次数:5
Hibernate: update tb_article set channelid=?, columnid=?, comment=?, content=?, createtime=?, image=?, ispublic=?, istop=?, state=?, thumbup=?, title=?, type=?, updatetime=?, url=?, userid=?, visits=? where id=?
查询次数:6
Hibernate: select article0_.id as id1_0_0_, article0_.channelid as channeli2_0_0_ from tb_article article0_ where article0_.id=?
查询次数:6
查询次数:7
查询次数:8
查询次数:9
查询次数:10
Hibernate: delete from tb_article where id=?
查询次数:11
Hibernate: select article0_.id as id1_0_0_, article0_.channelid as channeli2_0_0_ from tb_article article0_ where article0_.id=?

　　/**

     * 根据ID查询实体

     * @param id

     * @return

     */

    public Article findById(String id) {

        System.out.println("查询次数:"+i++);

        //先从缓存中查询当前对象

        Article article=(Article)redisTemplate.opsForValue().get("article_"+id);

        //如果没有取到

        if(article==null){

            //从数据库中查询

            article=articleDao.findById(id).get();

            //存入到缓存中

            redisTemplate.opsForValue().set("article_"+id,article,10, TimeUnit.SECONDS);

        }

        return article;

    }

查询次数:1

Hibernate: select article0_.id as id1_0_0_, article0_.channelid as channeli2_0_0_ from tb_article article0_ where article0_.id=?

查询次数:2

查询次数:3

查询次数:4

查询次数:5

查询次数:6

Hibernate: select article0_.id as id1_0_0_, article0_.channelid as channeli2_0_0_ from tb_article article0_ where article0_.id=?

查询次数:7

查询次数:8

查询次数:9

redisTemplate.opsForValue().set("test", "100",60*10,TimeUnit.SECONDS);//向redis里存入数据和设置缓存时间

redisTemplate.opsForValue().get("test")//根据key获取缓存中的val

redisTemplate.boundValueOps("test").increment(-1);//val做-1操作

redisTemplate.boundValueOps("test").increment(1);//val +1

redisTemplate.getExpire("test")//根据key获取过期时间

redisTemplate.getExpire("test",TimeUnit.SECONDS)//根据key获取过期时间并换算成指定单位

redisTemplate.delete("test");//根据key删除缓存

redisTemplate.hasKey("546545");//检查key是否存在，返回boolean值

redisTemplate.expire("red_123",1000 , TimeUnit.MILLISECONDS);//设置过期时间

redisTemplate.opsForSet().add("red_123", "1","2","3");//向指定key中存放set集合

redisTemplate.opsForSet().isMember("red_123", "1")//根据key查看集合中是否存在指定数据

redisTemplate.opsForSet().members("red_123");//根据key获取set集合